Exhibition House: A user`s guide
Contents
1. 11 Building services overview 12 Keeping the house warm 12 Keeping the house cool 13 How to keep water bills down 14 How to keep electric bills down 14 The building services in detail 14 Refit rearrangement and demolition considerations 19 Altering the fabric of the building 19 Altering the structure of the building 19 Lifetime Homes adaptations 19 Design for demolition 20 The garden 21 Overview 21 Terrace and lawn 21 Garden shed 21 Clothes dryer 21 Water butts 21 Composting bins 21 Cold frame 21 Raised beds 21 Surface water drainage 21 10 00 Local amenity information 22 10 01 Refuse 22 10 02 Public transport 22 10 03 Cycle routes 22 10 04 Car parking 22 10 05 Location of essential services 22 11 00 Emergency information and procedures 23 11 01 Location of emergency information 23 11 02 Location of utility isolation 23 11 03 Contact information 23 2 00 Key data Address Exhibition House Exhibition Mews Bordon Hampshire GU35 OGY Responsibility of Lee Burn East Hampshire District Council Position Facilities manager Users guide issue number 1st edition Date January 2013 This users guide should be kept at all times in Exhibition house study Electronic version available from www whitehillbordon com Prepared by lan McKay of BBM Sustain able Design Limited2. Guide design consultant Peter Brawne Matter 3 00 Introduction 3 01 Purpose of user guide This Users Guide sits alongside the Operations and Maintenance Manual O amp M Manual prepared by Westridge Construction who built the house The users guide provides an overview of the ideas behind the design of the house its energy and resource efficient strategies as well as descriptions of how elements are made and how they work In the interests of making it user friendly the guide has been conceived to communicate predominantly through illustrations and photographs with supporting written descriptions and an notations The householder should also be aware that if carrying out maintenance and material alterations to the building fabric and or electrical and mechani cal services of the property there is a digital appendix to the User Guide with a schedule of user guide updates Use this document to record the nature date and responsibility for the work The master electronic version of this Microsoft Office document is held at East Hampshire District Council Penns Place Petersfield Hampshire GU31 4EX 3 02 Project vision In order to demonstrate to existing and future residents of Whitehill and Bordon that green living can be enjoyable the Eco town team commissioned Riches Hawley Mikhail to design a two bed room four person exhibition house to demonstrate the opportunities of living a ze
3. Description This is the section of roof over the north facing pitch of the house The roof consists of engineered timber i beams tgi joists which are sandwiched between oriented strand board OSB to form pre fabricated cassettes The upper face has a breather membrane which beads water but allows water vapour to escape the construction Chestnut shakes form the outer roof finish The joists are infilled with Warmcell celulose insulation The sec tion has a plasterboard finish to the underside fixed to softwood battens which forms a service zone but where it encloses the attic space there is no plasterboard finish and the foil backing of the soffit insulation is exposed Watch points The taped foil backing of the roof insulation forms the vapour barrier and air tightness membrane of the building If you inadvertently puncture the foil backing reseal immediately with suitable foil tape U Value 0 079W m K Construction build up 1 Sweet chestnut shakes 2 Reinforced bitumen membrane interlay 3 Treated ex38x25mm sw battens and counter battens as provides min 50mm clear ventila tion 4 Vapour permeable roof underlay Pro clima Solitex Plus 5 18mm oriented strand board outer sheathing layer OSB3 6 400mm deep timber i beam rafter 7 Blown in gypsum impregnated recycled news print insulation 8 9mm oriented strand board outer sheathing layer OSB3 9 Polyurethane soffit insulation Kingspan Koolth
4. gt o uu P Oo NSS od N AAN N i im o o gt gt LO e CN e pt Nm 1 T AS Qiii mnn Qiii tnn Understanding the basic principles behind the low energy design of the house will help the homeowner interact and control the various technologies as well as exploit the most energy efficient modes of operation 4 01 Materials Buildings impact the environment when they are built when they are in use and finally when they are demolished With good design we can minimize these impacts at every stage of the energy lifecycle of the house Starting with the energy and environmental impact of how the house was built the design ers have opted mainly for materials that have been grown such as timber products There is generally far less energy involved in making buildings out of wood than say brick and concrete The material itself is renewable it can be re grown and wood products lock carbon out of the atmosphere through photosynthesis as a result of which wood has no carbon emissions 4 02 Services The house has been designed to nurture low carbon lifestyles for its inhabitants It incorporates simple tech nologies such as the external clothes line a bike store to support low carbon transport recycling storage in the kitchen and garden shed and a garden design which supports the growing of food and recycling of food waste The home working study points to a more flexible and efficient way of wor
5. Building services overview e J LA L LJ L e e e L e e e LJ LJ e L e e LJ e L e L LJ LJ e LJ 4 LJ v eee 0 0 0 0000000000000006000060 9 0 0 In this section we outline overall workings of the heating cooling ventilation water and electrical systems of the house as well as detailed operational information for the specific ele ments incorporated into the design These include Winter garden Tromb wall Heat store and hot water cylinder Solar thermal and solar PV panels Awadukt MVHR Mains and rainwater storage tank Essential and non essential electrical circuits LED lighting The electrical controls Monitoring strategy left Some of the main heating systems of Exhibition house can be seen on the south elevation solar electric photovoltaic panels solar thermal panels winter garden sliding sun screen tromb wall inter seasonal heat store OooaRWN by 77 WL WMA LLM 277 7 p above Passive heating of the house is provided by convected warmed air in the winter garden and from radiant heat from the tromb wall into the evening 7 01 Keeping the house warm The design of the exhibition house is based on the princi ple of first focusing on minimizing energy demand When it comes to keeping the house warm in winter this means slowing down the rate of heat loss from inside to outside To d
6. main exhibition building is the refurbishment of the existing Edwardian former fire station designed by BBM Sustainable Design The building is now the Eco station with exhibition space a lecture theatre and office space There will also be exhibitions of history and local ecol ogy and an adjacent old stable block has been retained The refurbishment has focused on improving the thermal performance of the building adding in sulation to some of the floors walls and roof as well as installing new energy efficient gas boilers In 2013 the construction of three ter raced houses will commence These will demonstrate how eco homes can be affordable and provide a model for future homes in the town Radian Hous ing Group is the client for this project working with Ash Sakula Architects The final project will be the refurbish ment of the existing drill tower It will be clad in solar panels and contribute to the energy efficiency of the Eco station Together these projects should provide a learning resource for the Eco town and beyond 3 4 00 Overview of the house and sustainability features CN d 13 a Ground floor V north d First floor Loft The rooms in the house are organised to respond to both the environmental and exhibition requirements of the brief A central cir
7. screed e Aplatform wall climbing lift can be fitted to access the master bedroom and living room A knock out floor panel has been fitted beneath the floor finish with joist trimmers to suit Details of the panel s location can be seen in the plans accompanying the O amp M Manual e A horizontal chair hoist can be fitted between the master bedroom and the bathroom Details of the route can be seen in the plans accompanying the O amp M Manual 8 04 Design for demolition A site waste minimisation plan helped to reduce material waste during construction and avoided waste streams to landfill However the plan went further and identified how the construction of the building can be demolished and salvaged to maximum potential The matrix from this document is copied below e Ground floor slab design with large voids on plan to mini mise use of concrete and use site waste spoil to backfill the voids e Brickwork Lime mortar has been specified to enable salvage of brick and blockwork in future e Timber frame Using careful demolition methods it should be possible to salvage much of the timber frame compo nents e New roof steelwork and lintels Bolted connections have been used wherever practicable to enable future salvage and reuse e Aluzinc standing seam roof Easily salvagable and highly recyclable Cork floors Can be easily salvaged to provide energy from waste Entrance matting C S Products are sourced locally wh
8. to the MVHR unit In the process the air is subjected to the ambient thermal mass of the ground so it either warms up very cold winter air or chills down very hot summer air If further top up energy is needed there is a hot water heating coil that can be activated to warm the supply air duct in very cold weather Again this is done automatically to maintain the termperature set by the house thermostat It is important for the household to understand the basic 17 7 00 Building services overview 7 05 The building services in detail principle of how the MVHR system operates It does not work effectively if windows and doors are left ajar or wide open Therefore it is important to let the MVHR do all the ventila tion This is the case even in the summer If you need extra ventilation for example if you have been doing a lot of cooking or there are a lot people in the house you can select the boost mode You can access the MVHR controls in the bathroom Medium speed Boost Timer Low speed Mains and rainwater storage tank The mains water enters the house near the kitchen sink and you will find the stop cock for the incoming water in this loca tion All the hot and cold water feeds in the house are direct from the mains and therefore under high pressure The excep tions are the ground floor toilet cistern and washing machine These are fed by a rainwater harvesting tank in the bathroom cupboard The r
9. 1420 477111 website www bordondoctors com Pinehill Surgery Pinehill Road Bordon GU35 OBS tel 01420 477968 website www pinehillsurgery co uk Mill Chase Leisure Centre Mill Chase Road Bordon GU35 OER tel 01420 472549 website www dcleisurecentres co uk Forest Community Centre Pinehill Road Bordon GU35 OBS tel 01420 488978 website www forestcommunitycentre co uk All Saints C Of E Church High St Headley GU35 8PP tel 01428 717321 website www headleyallsaints org uk 23 11 00 Emergency information and procedures 11 01 Location of emergency information For emergency information please refer to the accompanying O amp M manuals in section 13 and 18 and associated manufac turer s literature for intruder alarm smoke heat detectors and remote control switch 11 02 Location of utility isolation e Mains electricity Entrance hall cupboard e Photovoltaic panels DC shut off is left of inverter in loft AC shut off is right of inverter in loft Mains water Stopcock under kitchen sink e Rainwater Stopcock under rainwater harvesting tank BT master socket Entrance hall cupboard For further information on the location and isolation of utilities please refer to the accompanying O amp M manuals record drawings 11 04 Contact information Building owner East Hampshire District Council Facilities manager Lee Burn East Hampshire District Council Fire alarm service provider Sout
10. House on Exhi a users guide ts M how to achieve energy efficiency and low running cos A TAI LTI hii EFFEEF iilii ii ADAAN CONALL M URN th i i mt LET d d HTN i it i LH Kar RAE AR le d nm 7 i ili AUI lll MITT L m f LL TB a y A x CPU ee zn e pA 7 V4 12 1 1 00 Contents 1 00 2 00 3 00 3 01 3 02 4 00 4 01 4 02 4 03 5 00 5 01 9 02 5 03 5 04 5 05 5 06 5 07 5 08 5 09 5 10 5 11 95 12 5 13 5 14 5 15 6 00 6 01 6 02 6 03 6 04 7 00 7 01 7 02 7 03 7 04 7 05 8 00 8 01 8 02 8 03 8 04 9 00 9 01 9 02 9 03 9 04 9 05 9 06 9 07 9 08 9 09 Contents Key data 1 Introduction 2 Purpose of users guide 2 Project vision 2 Overview of the house and sustainability features 3 Materials 4 Services 4 Rennovation and demolition 5 Building fabric overview 6 Masonry plinth wall 6 Timber structure 6 Timber cladding 6 Chestnut shakes 6 Tromb wall 7 Air tightness membrane 7 Floor screeds 7 Cork and carpet floor finishes 7 Sweet chestnut shingle roof 8 Solar panel roof 8 External wall 8 Tromb wall 9 Wall window junction 9 Ground floor construction 10 Upper floor external wall junction 10 Joinery overview 11 Single leaf external doors 11 Sliding folding doors 11 Windows 11 Sliding sun shade
11. ainwater harvesting tank works without any electrical pumps relying entirely on gravity For this reason it is a very effective low carbon technology The tank is fed from the north roof pitch of the house via a diverter on the rainwater down pipe It has an overflow back into the downpipe and also a ball valve within the tank that automatically tops up the tank if it gets too low with mains water From time to time perhaps once every six months it may be necessary to inspect the divert pipe into the tank The stainless steel cover on the diverter can be removed by lifting it upwards This will expose the diverter pipe which can be unclipped It may be preferable to remove the cover on the tank itself and rod through the inlet pipe from the inside Any sediment or other obstructive material can be washed out into the downpipe above left The rainwater storage tank in the bathroom cupboard works on gravity and feeds the ground floor WC above right The rainwater diverter for the tank is located at high level on the north elevation downpipe and is concealed by the stainless steel slieve it is removable by lifting upwards and this allows access to the plastic diverter kit which from time to time will need inspecting and cleaning LED lighting The house is lit entirely by LED Light Emitting Diode technology LED lights have for many years been extremely expensive given off rather harsh glaring light and their use has been
12. below the structural lines of the outer and inner walls In between there is no slab but rather infilled hardcore upon which the insulated floor build up sits The floor is covered in cork tiles that are warm to touch and form a tight interface with the thermal mass of the floor screed Watch points There is no underfloor heating within the screed but there is a steel mesh reinforcing grid The cork floor has an integral varnish and was laid with two further coats of water based acrylic varnish This coating will over time wear thin and the homeowner should be vigilant of areas that start to show a dull matt appearance This is where the varnish has completely worn through The cork should be cleaned with wire wool and resealed immediately For quick repairs to the worn areas mask off the area concerned to the nearest tile joints and reap ply a suitable quick drying clear floor varnish such as Bona Traffik After many years of use you may chose to refresh the whole floor finish first prepar ing the surface by rubbing back with wire wool and then applying one or two coats of the floor varnish U Value 0 08W m K Construction build up 1 4 5mm thick cork tile with acrylic varnish 2 75mm sand cement screed 3 500 gauge polythene damp proof membrane 4 2 layers of 120mm thick Celotex XR4000 insulation 5 1200 gauge Visqueen Ecomembrane damp proof membrane 6 50mm sand blinding layer 7 150mm thick well consoli
13. can be accessed from Service 13 bus and Farnham and Haslemere Stations can be accessed from the Service 18 bus 10 03 Cycle routes Leisure centre For the latest cycle route information visit http www cycle route com http www sustrans org uk Community centre 10 04Car parking The house includes off street parking for one car with suf ficient free space to provide ease of access for wheelchair users The garden shed also includes a car charging point for electric cars inside the lockable bin store facing the drive Place of worship 10 05 Location of essential services One Stop is located about five minutes walk south on Camp Road A325 Tesco is located about five minutes drive south on Camp Road A325 Bordon Post Office is located about five minutes walk south on Camp Road Lloyd s bank is located immediately adjacent the site Cash points are also located at the Whitehill Bordon Tesco The local Tesco has a small pharmacy Bordon Infant School Bordon Hampshire tel 01420 472358 website www bordoninfantschool ik org Weyford Infant School and Nursery Bordon Hampshire tel 01420 472119 website www weyford inf hants sch uk Bordon Junior School Budds La Bordon GU35 0JB tel 01420 472145 website www bordon junior hants sch uk Chase Community Hospital Conde Way Bordon Hampshire GU35 0YZ tel 01420 488801 Forest Surgery 60 Forest Road Bordon Hampshire GU35 OBP tel 0
14. cessible including a ramped access to the raised beds on the south and west side of the garden ideal for wheelchair users 9 02 Terrace and lawn The paved terrace extends into the winter garden affording semi sheltered external space and thus projects the living space into the garden Together with the lawn these areas can be used for relaxing in or supporting limited forms of play 9 03 Garden shed The garden shed accommodates wheelie bins a car charging point and a cycle stand 9 04 Clothes dryer The whirly gig clothes dryer behind the garden store allows the occupants to air dry washed clothes without the use of an energy hungry tumble dryer If using a freestanding clothes dryer the winter garden is also an ideal place to dry clothes regardless of weather 9 05 Water butts The garden shed is fitted with a pair of large water butts which can be used to water the garden and car washing The householder should periodically inspect the diverter pipes to clear any blockages which might restrict rainwater collection raised beds M 9 06 Composting bins cold frame There are a pair of compositing bins in the garden which allow the householder to turn food waste into nutrient rich compost for use on the garden Not all food is suitable for this form of composting Meat onions and citrus fruit are among a range of foodstuffs requiring an alternative means of dis posal The compost bin has two compartm
15. culation route allows easy movement of the public as for an exhibition In terms of reducing the demand for energy to heat the house the sedentary spaces the living room dining area main bedroom and study are located in the warmest part of the house These south facing rooms ben efit from two passive design features built into the south facing wall a winter garden and a tromb wall The kitchen bathrooms and the entrance hall are in the coldest part of the house forming a buffer to the walls that face north and therefore don t benefit from the warmth of the sun The winter garden traps heat between two layers of glass in winter while in summer the outer layer of glazing can be left permanently open providing a covered area at ground floor for a table and chairs and a balcony off the mas ter bedroom at first floor level The tromb wall works from the sun heating an area of clay blocks that provide thermal mass which stores and radiates heat internally a timber screen gives shade so the wall does not over heat in the summer The open circulation not only creates views to different floors but it also acts as a route for passive ventilation to all the rooms At the centre of the stair Exhibition house floor plans at a scale of 1 200 A D Driveway Entrance lobby Hall Accessible W C Living room Iromb wall W
16. dated hardcore 8 Original sub ground as excavated 5 15 Upper floor external wall junction Description The junction of the intermediate floors and external walls is critical again because of the continuity achieved with the vapour control and air tightness membrane The wall cassettes were assembled above and below the floor insertion which itself is spaced with an engineered Kerto edge beam Unusually for a suspended timber floor the upper floors include a sand and cement screed laid between softwood battens which is sealed with a heavy layer of latex levelling screed The cork floor finish is laid on the screed Watch points The upper floor ceilings are formed with a 12 5mm plasterboard ceiling fixed to a 25mm deep softwood batten which forms a service void Any changes to the wiring in the ceiling can make use of this wiring space See ground floor construction above for details of looking after the cork floor finish U Value N A Construction build up 1 4 5mm thick cork tile with acrylic varnish on latex levelling compound 2 Sand and cement screed laid between ex50 50mm softwood battens 500 gauge polythene damp proof membrane Engineered timber i joist Galvanised metal joist hanger 100mm thick mineral wool acoustic insulating slab 12 5mm plasterboard and plaster skim Decorated softwood skirting Service zone formed with 25mm deep soft wood battens 10 9mm oriented strand board inner sheath
17. e external wall window and door junctions are a Critical part of the exhibition house construction The reveals are formed by two back to back tgi wall studs lining all four sides of the aperture The cavity between the studs is infilled with mineral wool The outer face of the studs is lined in 18mm thick OSB This part of the wall also shows the Kerto engineered timber edge beam which forms a window door lintel and in other areas where there is an oversailing upper floor it forms the floor edge beam Watch points How the vapour control and air tightness mem brane attaches to the door and window frames is critical for the junction of external joinery elements and apertures in the external wall This is done with specialist air tightness tape If and when any of the doors and windows are replaced it is vital for the air tightness taping to be redone around the newly inserted unit This will entail removal of the plasterboard reveals and sills in order to achieve a successful reinstatement there is a risk that further drying may cause cracks to work through the clay plaster finish particularly during transitions of solar intensity The clay plaster is through coloured meaning it is not painted If the plaster becomes tired and stained over time use a Suitable clay paint product Do not use conventional emulsion The brise soleil is fixed with stainless steel screws which allows the screen to be removed for maintenance i
18. ecycling tank which serves the ground floor toilet flush and washing machine e water efficient taps low water use bath 140 litre rain water butts for watering the garden and car washing Using these features will help the homeowner reduce water consumption and bills 7 04 How to keep electric bills down The house has a number of features that help the homeown er lower electricity use These include e 100 per cent use of LED lighting 321 watts total lighting capacity e 15 solar electric photovoltaic panels on the south roof which generate up to 3 525KW of peak output e asmart meter which helps encourage the homeowner to use less electricity and receive more feed in tariff pay ment e essential and non essential electrical circuits within the house so that power can be switched off with the push of a single button when leaving the house for all the non es sential elements eb iin above The winter garden has been designed to trap useful solar gain in the winter months bottom and to release unwanted solar gain in the summer months top with the outer glazing designed to be left open 7 05 The building services in detail Winter garden The winter garden is part of the passive solar heating strat egy of the house It works by trapping the sun s heat between the inner treble glazing and outer layers of glass double glazing which can flow into the main spaces of the interior by op
19. ening its inner doors and windows he householder needs to familiarise themselves with how the winter garden works through the year as it has the potential to make a lot of heat very quickly particularly in the intermediate seasons spring and autumn as well as in the summer Cold weather mode e Night time keep all vents closed e Overcast keep all vents closed e Sunny open inner vents only when the winter garden air temperature has been sufficiently heated to make it beneficial to the rest of the house ll Warm weather mode e Night time keep all vents closed e Overcast keep all vents closed e Broken cloud and sun open inner vents only when the winter garden air temperature has been sufficiently heated to make it beneficial to the rest of the house but if the main spaces are getting too hot close the inner line of vents and open the first floor outer vents e Sunny keep the outer line of vents closed the inner line 15 7 00 Building services overview 7 05 The building services in detail of vents open and rely on the MVHR to keep the spaces cool or if really hot close the inner line of vents and open the outer line of vents lll Hot weather mode e Night time keep outer vents open and inner vents closed and rely on MVHR to keep the spaces cool e Day time keep outer vents open and inner vents closed and rely on MVHR to keep the spaces cool The inner line of glazing is designed as both the main thermal l
20. ens and counter battens 3 Breather membrane 4 18mm oriented strand board outer sheathing layer OSB3 5 Engineered timber i stud 6 Blown in gypsum impregnated recycled news print insulation 7 9mm oriented strand board inner sheathing layer OSB3 Vapour control breather membrane Mineral wool service void insulation 0 12 5mm plasterboard and plaster skim on 25mm deep softwood battens 11 Brick plinth outer leaf 12 2x 100mm phenolic foam insulation 13 100mm blockwork TOD 9 5 00 Building fabric overview 5 12 Trombe wall Description The technical operation of the tromb wall is described in more detail in section 7 0 It has three elements the wall itself which is a 200mm thick unfired clay block stacked with clay mortar Its inner face is sheathed in a through coloured clay plaster not painted The middle layer is the glazing element and sits on the outside face of the wall forming a sealed air cavity The glazing itself is a polycarbonate sheet infilled with aerogel This element helps retard heat loss to the outside The outer layer is the sun shading device or brise soleil It is made from the same timber as the rest of the cladding Watch points The construction of the wall is experimental as the unfired clay blocks are being used as a dynamic solar heat store which has not been tested before As the blocks have only been ambiently dried 5 13 Wall window junction Description Th
21. ents which allow one compartment to be rotted down and then utilised while the other side is being filled The heap will need to be turned occasionally The householder should obtain further informa tion on how to successfully operate a compost bin from local garden centres relevant books and websites 9 07 Cold frame The inclusion of a cold frame allows the householder to extend the growing season of the garden and enjoy the harvest of home grown fruit and vegetables from earlier in the gardener s calendar The cold frame is used to harden off tender seedlings before planting out The householder should obtain further information on how to successfully operate the cold frame from local garden centres relevant books and websites 9 08 Raised beds The raised beds around the garden are easier to maintain than traditional beds The extra height afforded requires less strenuous effort to tend the preparing of soil planting out and weeding 9 09 Surface water drainage The garden design including the hard standing areas have been designed to be free draining and to help avoid exces sive volumes of water being directed into the local surface water disposal system The surface water drains connect to a soakaway located on the far side of Exhibition Mews See the O amp M Manual for more information on below ground drainage 22 10 00 Local amenities 10 01 Refuse The house has a number of design features which a
22. er early spring when the underground heat store energy is starting to wane from an electric emersion heater at the base of the tank 7 02 Keeping the house cool The house will maintain excellent thermal comfort conditions automatically without much active control required by the oc cupier Most of this work is done by the insulation used in the outer fabric of the building It helps keep the house warm in winter but also helps keep it cool in summer However in very hot weather and to avoid the interior overheating it is best to keep the winter garden outer glazed doors open It should be left like a covered porch or loggia Keep the outer first floor windows open too The inner line of glazing of the winter garden should remain shaded from summer sun There is also a sliding solar shade on the living room south side window which again should be deployed only if the house is starting to overheat in high summer It is a good idea to keep the mechanical ventilation system running as the underground air feed pipe known as an earth pipe or Awadukt will bring fresh cool air into the house above In hot weather the first floor glazing can be left on permanent vent and the outer set of ground floor doors can be left in the open position 14 7 00 Building services overview 7 3 How to keep water bills down The house has a number of features which help the home owner lower water use These include e rainwater r
23. erever possible and the aluminium content of the mats are 100 recyclable C S entrance matting systems are easily refurbished by re stripping the carpet sections only Balustades Timber components can be easily salvaged for energy from waste Ironmongery Refer to architect s door schedule and Styletech ironmongery schedule for individual items lronmongery should predominantly be salvagable within a reasonable lifespan of the intended use of the building Sanitary fittings The specified products should predomi nantly be salvagable within a reasonable lifespan of the intended use of the building Insulation materials The blown in insulation will in theory be possible for reuse Otherwise it is biodegradable The mineral fibre quilt and rigid foam insulation boards should predominantly be salvagable within a reasonable lifespan of the intended use of the building 21 9 00 The garden M e ir dre pu y at go bins ec e m at eS heat store i ET 9 01 Overview The garden has been designed to compliment the future thinking of the house itself and offers a glimpse of the kind of landscape that will be required to support a low carbon lifestyle Thus it functions on a number of levels e As a place of repose and play e As a means of growing fruit and vegetables for the household e As a means of supporting other aspects of a low carbon lifestyle The garden has also been designed to be fully ac
24. erm K7 with integral vapour control membrane with taped joints 10 Vapour control membrane as 9 11 12 5mm plasterboard and plaster skim on 25mm deep softwood battens 5 10 Solar panel roof Description This is the section of roof over the south facing pitch of the house The roof structure is the same as the north facing pitch but differs in having a roof finish of solar thermal and solar photovotaic panels These are fixed to a standing seam metal roof mounted on gapped softwood boards ventilating to the underside of the metal sheet The metal sheet is aluminium coated in galvanized zinc Watch points The taped foil backing of the roof insulation forms the vapour barrier and air tightness membrane of the building If you inadvertently puncture the foil backing reseal immediately with suitable foil tape U Value 0 079W m K Construction build up Solar thermal or solar photovoltaic panels Fixing rail Aluzinc standing seam metal roof Gapped softwood boarding Softwood battens forming ventilated cavity Vapour permeable roof underlay Pro clima Solitex Plus 18mm oriented strand board outer sheathing layer OSB3 8 Engineered timber i beam rafter 9 Blown in gypsum impregnated recycled news print insulation 10 9mm oriented strand board inner sheathing layer OSB3 11 Polyurethane soffit insulation Kingspan Kooltherm K7 with integral vapour control membrane with taped joints 12 Vapour contr
25. hern Alarm Services 25 Cradle Hill Rd Seaford East Sussex BN25 3JE tel 01323 899634 Security alarm service provider Languards Alarms 217 Preston Road Brighton East Sussex BN1 6SA tel 01273 561883 Contractor s aftercare manager Andre Hayler of Westridge Construction email a hayler wcluk co uk tel 01580 830600 mobile 07968 514694 WHITEHILL amp BORDON TOWN
26. ht The solar thermal has a drain back system for the circulating fluid do not remove the blue container as the system is designed to emergency discharge if overheating occurs Solar thermal and solar photovoltaic panels The south pitch of the house accommodates fifteen solar photovoltaic panels producing up to 3 525KW of peak output and additionally six solar thermal water heating panels The photovoltaic panels provide a direct current DC to the inverter in the loft the red and black box which in turn converts the power into alternating current AC so it can be fed into the utility provider s power network as well as for use around the house The house was supplied with a smart meter by the energy company so the homeowner can be fairly compensated for the amount of energy sent into the grid in addition receive the associated feed in tariff FIT The inverter records the daily as well as cumulative power gener ated in kilowatt hours The ventilation system The MVHR unit in the loft automatically controls the ventila tion of the house with a very low power fan The incoming fresh air supply passes through an Awadukt or earth pipe It is a very long and wide air duct which starts with an air inlet turret located behind the bike shed then buried underground around the perimeter of the house before passing under the ground floor slab and rising up through the core of the staircase and into the loft where it connects
27. ibition house trials a range of different and innova tive technologies which has led to a complex set of electrical controls for the heat and power networks These controls are in various locations Ground floor electrical cupboard e the fuse boards for both the essential and non essential electrical circuits e the telephone master sockets the monitoring equipment data receiver and transmitter e some of the monitoring sub meters the intruder alarm Bathroom cupboard e main mechanical installation control panel with consumer interface e Sub meter for immersion heater heating coil and other mechanical systems e sub meter for solar thermal array e solar thermal control panel above There are a number of check meters throughout the house as part of the monitoring being carried out on Exhibtion house Two are visible in the above image either side of the solar thermal control panel Monitoring Strategy The exhibition house has been fitted with numerous moni toring devices These installations record energy use and energy generation as well as atmospheric and meteorological data This information will in turn help determine how effec tive the various technologies have been in the completed house A full list of the monitoring equipment installed includ ing locations on the house plans can be found in the O amp M manuals 19 8 00 Refit rearrangement and demolition considerations This section includes im
28. id the Food shops householder in efficiently sorting and dealing with refuse The kitchen sink unit contains three separate recycling recep tacles which allow for the sorting of recyclable materials The garden has a composting bin which will deal with some food Post box office waste materials see section 9 06 Finally there is the garden shed which has ample provision for wheelie bin storage Bank cash points The Bordon Household Waste Recycling Centre HWRC is located at Station Road Pharmacy Bordon GU35 OLG Schools For an up to date schedule of refuse collection times vist http www easthants gov uk ehdc recyclingandwaste nsf 10 02Public transport Buses Service 13 Provides an hourly service connecting Basingstoke Alton Kingsley Lindford Bordon Whitehill Liphook Service 18 Provides an hourly service connecting Aldershot Farnham Bordon Whitehill Lindford masiemere Medical centres Service 73 Operates on Wednesdays and connects White hill and Bordon to Petersfield via Liss and Greatham Details of the timetables for service 13 and service 73 can be found in the Travel Guide for Bordon Whitehill and Liphook http www3 hants gov uk Trains Whitehill amp Bordon does not currently have a rail station There are rail link services from Portsmouth to London via Liphook and Haslemere or to London line via Alton and Farnham Alton and Liphook Stations
29. ine of the building and is fully securable such that the outer glazing can be left fully open even if you are leaving the house Use the Teleflex winders to open and close the up per inner line of windows Tromb wall The tromb wall has no moving parts and it has its own built in means of solar control in the form of an outer louvered sunscreen Whilst the winter garden provides beneficial solar heat by day the tromb wall stores solar energy from the day and releases heat after the sun has set The tromb wall itself is made up of three specific elements The inner leaf is the unfired clay block wall which has an amazing capacity to store heat The second and middle ele ment is the glazing panel Unlike earlier forms of tromb wall this one uses a super insulating polycarbonate panel filled with aerogel which allows light to pass through and onto the clay block wall but retards heat loss in the other direction The third and outer element is the sunshade which allows winter sun onto the polycarbonate panel but proportionally less and less as the sun climbs through its solar calendar until during the middle of the day in high summer the glazed element will be in full shade With this innovative blend of features it is hoped the house s tromb wall will overcome the problems associated with early trials of this technology in this climate namely overheating during the summer and stopping excessive heat loss late into the nigh
30. ing layer OSB3 11 Vapour control breather membrane VCL taped to window door with proprietary air tightness tape system 12 VCL lapped around outer edge of floor cas sette 13 Blown in gypsum impregnated recycled news print insulation 14 Kerto engineered timber edge beam o o Ao oo 11 6 00 Joinery overview 6 01 Single leaf external doors There are two types of external doors used in the exhibition house The single leaf entrance doors are from the Nordan NTech range and are highly insulative and very well sealed In the front door lobby it is the inner doorset that forms the true thermal line and air tightness seal for the main interior With the kitchen doors it is the outer door performing this role It is important to keep the inner front door and outer kitchen door closed to maximise the efficiency of the MVHR system see section 7 0 for more information The construction of the doors is timber sandwich panel with a micro porous wood stain and triple glazed vision panels See the O amp M manual for details of colour 6 02 Sliding folding doors The second type of external door is the sliding folding doors to the winter garden These are supplied by ID Systems and use Sunflex sliding folding door gear The inner set of doors are designed as the true thermal and air tightness line of the house see section 7 0 The outer doors are double glazed and the inner doors are triple glazed The construct
31. inter garden Kitchen diner Shed storage 10 Bin store 11 Water collection 12 Garden 13 Inter seasonal heat store underground 14 Main bathroom 15 Bedroom 1 16 Void 17 Mezzanine level 18 Bedroom 2 19 Services cupboard 20 Outline of possible future Lifetime Homes lift access 21 Attic 22 Photovoltaic and solar thermal panels on standing seam metal roof 23 Sweet chestnut shingle roof 00 00o0Na2 case is a service duct connecting to the mechanical ventilation unit The ground floor is fully wheelchair accessible conforming to the require ments of Lifetime Homes This standard comprises 16 design criteria that can be universally applied to new homes to make them more convenient and accessible to the broadest range of homeowners including elderly people and those with physical disabilities It in cludes future adaptation features which are explained in section 8 0 The design has considered future changes to the house and allows for demolition and salvage 4 00 Overview of the house and sustainability features section A A Section B B Section D D o o O O gt gt m Q ND S amp A Z wj i ied
32. ion of the doors are softwood timber with a micro po rous wood stain and double and triple glazed vision panels See the O amp M manual for details of colour 6 03 Windows The windows are from the Nordan NTech range and are highly insulative and very well sealed Many of them have tilt and turn operation and more details of their operation can be found in the O amp M manual Whilst the windows are openable and do have restrictors they do not have trickle vents and it is recommended that all ventilation through the year is done through the MVHR unit The construction of the windows is thermally broken timber frames with a micro porous wood stain and triple glazed vision panels See the O amp M manual for details of colour One exception to the windows is the outer set of windows to the winter garden at first floor level These are double glazed units supplied by ID Systems Periodic checks of the silicone mastic joint of the sills should be carried out about once every six months to ensure integrity Replace with a suitable high perform ance sealant 6 04 Sliding sun shade The south facing living room window incorporates a sliding sun shade It is built out of the same material as the rest of the cladding glue laminated coppiced sweet chestnut See section 5 0 for more details The system uses traditional sash weights and pulleys all of which can be accessed by removing the adjacent verti cal cladding battens 12 7 00
33. king where daily commuting can be avoided near left above Exhibtion house is predomi nantly built out of prefabricated timber Build ing in timber is good for the environment as there is minimal processing energy required and in itself it is a form of carbon locking near left bottom Exhibtion house is ex ternally clad in glue laminated lengths of coppiced sweet chestnut which is grown and manufactured in the Sussex Weald far left The coppiced technique of harvest ing timber benefits from a mature root stock to regenerate the timber at a far greater rate than that of conventional logging far left As such it is regarded as the fastest way of growing hardwood and locking carbon 9 4 00 Overview of the house and sustainability features There is also an electric car charging point fitted within the bike shed While it utilizes daytime energy produced by the solar photovoltaic panels on the roof of the house it will provide truly low carbon transport It also has a range of energy systems which can help the homeowner cut down on utility bills See section 7 0 The most important aspect of designing a low energy house is first to ensure you have reduced the demand for heat and power In the Exhibition house this means really thick walls roofs and floors filled with thermal insulation So much insulation in fact that the house effectively will not need any form of artificial space heating input f
34. limited to decorative or secondary light sources as overall light power lux has been poor A new generation of this technology has overcome many of the past shortcomings and the lights in the exhibition house are a demonstration of the various applications they can be put to from discrete recessed ceiling mounted lights or small surface mounted fittings These new lights have the benefits of instant start up time good colour rendering and incredibly long lamp life 18 7 00 Building services overview above The electrical cupboard in the hall contains the main fuse boards for the essential and non essential electrical circuits The master off switch of the non essential circuits above right can be found in the entrance lobby 7 05 The building services in detail Essential and non essentail electrical circuits To help the household lead a low carbon lifestyle the house has a useful energy saving feature which is basically a master power off switch near the front door The idea being is that you can turn off all the lights and all non essential power sockets from a single point as you leave the house Those appliances and electrical systems on the essential electrical circuit remain on left The house has a fire alarm control switch located in the entrance hall left The house has an intruder alarm control panel located in the entrance lobby Electrical controls The exh
35. n The Volatile Organic Compounds in Paints Varnishes and Vehicle Refinish ing Products Regulations 2012 For more information on considering low environmental impact construction and energy saving technology refer to the following links www greenspec co uk www energysavingtrust org uk garden accessable for wheelchair users ax waste sorting bins wheelchair users N I a lt s 900mm min width stair with continuous handrail ground floor living space potential for entrance level bed space door layout and sizes to afford ease of access by ILAZ unam d drying facility m i rainwater butts external clothes ee SN future shower fitting l wide car space for wheelchair access and level approach to front door entrance level wc bedroom and bathroom E ETUR water eH for ceiling mounted nos chair hoist between g wheelchair accessible fittings feshold acces Ground floor outline of trimmed floor panel to allow First flo
36. n absolute minimum The membrane performs this role along with a range of tapes and grommets or eyelets as seen in the photo 5 07 Floor screeds The sand and cement screeds on the floors provide thermal mass preserving stable internal comfort conditions As a result occupants should remain cool even when air temperatures are rising above normal comfort conditions Thermal mass is important for helping to iron out fluctuations in air temperature It becomes particularly important in very hot weather where outside air brought into the house exceeds normal comfort conditions If the fabric of the house can absorb excess heat it acts as a buffer in those extreme weather scenarios 5 08 Cork and carpet floor finishes The cork floor finish has excellent eco credentials cork can be harvested from the same tree for about 200 years and no trees are cut down to extract the material The floors have been finished with two extra coats of acrylic varnish From time to time it will become necessary to reapply a coat of varnish The carpet is from UK producer Axminster from their Swaledale range It is made using wool from Swaledale sheep which is a hardy breed with an inherent amount of natural grey fibre in the pile which can be distinguished in the lighter colours of this minimally processed carpet Swaledale is thought to be the first accredited carbon neutral carpet 5 00 Building fabric overview 5 09 Sweet chestnut shingle roof
37. n four manageable panels U Value 0 277W m2K Construction build up Glue laminated coppiced sweet chestnut Polycarbonate panel filled with aerogel 120mm air gap 200mm thick unfired clay block wall 15mm thick clay plaster finish p II Construction build up 1 Glue laminated coppiced sweet chestnut clad ding 2 Softwood battens and counter battens 3 Kerto engineered timber lintel 4 Blown in gypsum impregnated recycled news print insulation 5 18mm oriented strand board outer sheathing layer OSB3 reveal lining 6 Vapour control breather membrane taped to window door with proprietary air tightness tape system Treble glazed panel Nordan NTech Window frame Nordan NTech 24mm medium density firbreboard MDF decorated window sill board 10 Engineered timber i stud back to back 11 Polyester powder coated aluminium 12 18mm oriented strand board outer sheathing layer OSB3 13 Example cable or pipe penetration sealed with an air tightness gromit 14 12 5mm plasterboard and plaster skim 15 Service zone formed with 25mm deep soft wood battens 16 100mm blockwork 17 2x 100mm phenolic foam insulation 18 Brick plinth outer leaf o N 5 00 Building fabric overview 10 5 14 Ground floor construction Description The ground floor slab is relatively unique in that it is not formed with a solid concrete slab but instead is formed over in situ cast concrete strips
38. ng continuous planks that reduce warp ing The timber has been treated with a penetrating oil which retards the leaching of natural tanins The tanin is a natural preservative but it can lead to tea coloured staining if cuts or penetrations are made to the cladding and are left untreated The sweet chestnut comes from the Sussex Weald SVAD ILI DM LA di 5 04 Chestnut shakes ee T N TRRS ER PE Woo The roof cladding on the north pitch is untreated chestnut shakes In normal condi 7T y 7 7 ore Sy tions the material is likely to provide a weatherproof finish for upwards of fifty years py Uy das s LL LLEVE BEL T dd Lama a 7 5 00 Building fabric overview 5 05 Trombe wall The tromb wall provides the house with a thermal store daytime solar energy is radiated into the interior providing evening warmth to rooms The natural clayblocks and clay plaster come from the Freshfield Lane Brickworks in East Sussex The outer glazed panel consists of a multi skin polycarbonate panel filled with aerogel which is a new generation of super insulation materials which allows the sun s radi ant energy to penetrate through to the clay blocks but inhibits escaping convected heat 9 06 Air tightness membrane The inside face of the timber structure is clad in an air tightness and vapour control membrane In a super insulated house with a mechnical ventilation system with heat recovery MVHR it is essential to reduce air leakage to a
39. o this the house is filled with thick layers of insulation in the roof outer walls and ground floor as well as super efficient triple glazed windows Through most of the cold months the space heating will be provided by a mix of the heat of the sun through the glazing the living activities of the occupants and from domestic appli ances and electrical devices The house can generate heat without burning gas oil or wood It does this with passive solar design to capture winter sun angles The south facade accommodates two special passive solar design technologies the winter garden and the tromb wall The winter garden is designed to trap winter sun rays which heat up the air within the outer and inner glazing This warmed air can then be let into the house via windows and doors but closed off as night falls and before the heat energy starts to flow out of the glazed space The tromb wall also traps the suns rays and converts the energy into heat Unlike the winter garden the tromb wall is designed to bring heat into the house after the sun has gone down It has a massive clay block inner leaf which is warmed 13 7 00 Building services overview on the outside by day and this energy slowly migrates to the inside face where it will gently emit radiant heat into the liv ing room and master bedroom The innovative construction also includes a middle leaf which is a polycarbonate glazed panel filled with aerogel a super in
40. ol membrane as 9 13 12 5mm plasterboard and plaster skim on 25mm deep softwood battens oS eh N 5 11 External wall Description The external walls are constructed of the same timber system as the roof The inside face is clad in plasterboard on softwood battens which forms a 25mm deep service void The vapour control and air tightness membrane sits behind the service zone The outer cladding is glue laminated cop piced sweet chestnut and black stained softwood battens and counter battens This forms a ventila tion zone and it is backed by a black breather membrane which beads water but allows water vapour to escape the construction Watch points You can run new wiring within the service zone behind the plasterboard but avoid penetrating the vapour control and air tightness membrane Use self adhesive wiring clips If new penetrations are required through the wall use a suitable self sealing grommet as it passes through the membrane The chestnut cladding is sealed with 2 coats of DEKS D1 saturator Oil Owatol Ltd It is important that any new penetrations or cuts in the cladding are sealed with a penetrating oil to avoid tanin stains black tea in colour Chestnut reacts badly with certain metals so only use stainless steel fixings U Value 0 092WW m 2K timber frame 0 12WW m2K brick plinth Construction build up 1 Glue laminated coppiced sweet chestnut clad ding 2 Softwood batt
41. or fitting of chair lift above Exhibtion house has a number of design features which conform to the requirements of Lifetime Homes and Code for Sustainable Homes in blue which allows particularly for future adaptation for those with mobility impairment 20 8 00 Refit rearrangement and demolition considerations 8 02 Altering the structure of the building Proposals to alter any of the floors walls or roof of the build ing should be first checked by a suitably qualified structural engineer before any work begins The house is a timber frame construction and is relatively easy to adapt There are a number structural posts and beams in addition to the engi neered timber joists rafters and external wall studs Please refer to the manufacturer s drawings in the O amp M manuals 8 03 Lifetime Homes adaptations The house has been designed to conform to the require ments of Lifetime Homes which is a design standard incor porating 16 design criteria that can be universally applied to new homes to make them more convenient and accessible to the broadest range of homeowners including elderly people and those with physical disability There are three main adaptations anticipated in the design e A floor gulley to allow the ground floor WC to be used as a shower room In addition to fitting the shower valves the floor would need to be relaid with anti slip welded vinyl flooring with coved upstands and falls formed in the
42. or all but the very dullest and coldest days of the year You can read more detail on the materials and construction of the exhibi tion house in sections 5 0 and 6 0 SS S a a U a imi a The house also makes its own energy both passively and actively It uses the sun s energy to produce heat and elec trical energy and it collects rainwater for use in the flushing of the downstairs WC and washing machine It has water efficient sanitary fittings LED lighting technology and a power OFF button by the front door which you can press when you want to turn off all the left on lights and non essential power sockets in the house You can read more on building services in section 7 0 4 03 Renovation and Demolition Buildings are a valuable resource for society as a whole and they must be capable of adaptation for new uses If and when their useful life comes to an end then the constituent parts of the construction and all the fittings need to be salvaged in such a way so as to maximize potential for re use in other buildings or some form of recycling CONVENTIONAL House ECO HOUSE The exhibition house has been de signed to be environmentally safe and easy to salvage top The inter seasonal heat store is buried deep in the ground the base is about 4 5m below the garden It is seen here during construction bottom These diagrams show the principles behind making a building like Exhibtion hou
43. portant informa tion pertaining to future adaptations of the building including features aimed at minimising environmental impact and maximising salvage potential for the building if and when it is demollished The building has also been designed to conform to the requirements of Lifetime Homes including provisions for future alterations The house has been designed to minimise the environmental impacts of disposal 8 01 Altering the fabric of the building There are a number of key elements of the building that must be given careful consideration during alteration work Of particular note are the external walls and roof where high perform ance vapour control and air tightness membranes help protect the timber frame structure from what is known as interstitial condensation and excessive ventilation heat loss which would alter the effectiveness of the building s ven tilation heat recovery See section 5 0 for details of where the membranes are located in the construction and section 7 0 for an overview of how the ventila tion system works If replacing windows or doors on the external envelope it is important to rein state air tightness taping See sections 5 0 The homeowner is encouraged to source materials for any DIY project ensuring timber products are from a Forest Stewardship Council FSC certi fied source and paints stains and var nishes comply with the Volatile Organic Compounds VOC limits stipulated i
44. ro carbon and sustainable lifestyle as well as a showcase for some of the technologies that such a lifestyle would include BBM Sustainable Design were appointed to prepare the specification and construction information whilst re taining the initial concept of the house Our brief required the house to be designed as an exhibit open to the public for a year and then in the future it would become a family home The project has provided a rare opportu nity to test new design solutions and technologies for carbon neutral living without losing sight of the role that de sign plays in creating a liveable home we wanted visible demonstrations of energy use and technologies but not at the expense of a comfortable and pleasant living environment Learning from the design and construc tion process for the exhibition house doesn t end when the building work is over This is why we have commis sioned a User s Manual The different technologies photovoltaic panels so lar thermal panels inter seasonal heat store rainwater harvesting mechani cal ventilation and heat recovery unit require some understanding in order to achieve the best performance from the home We want future occupants and visitors to understand how the house works and that management and main tenance is as important as design and construction The exhibition house is one of six exhi bition buildings on the former Ministry of Defence fire station site The
45. se super insulated whereby most of the space heating requirements are met by well controlled solar gain and the day to day living activities of the occupants 5 00 Building fabric overview This section describes the construction of the house with an overview of the prin ciples behind different materials and construction elements what purposes they serve and detailed drawings showing the fabric of the building Look out for the watch points giving information about upkeep and maintenance 9 01 Masonry plinth wall The plinth wall lifts the timber structure off the ground keeping it clear of ground water and rain splashes The photo opposite shows the wall from above at the junction of the draught lobby and living room wall with the east facing external wall The facing brick full cavity fill polystyrene insulation and concrete block inner leaf can clearly be seen The bricks are sourced from the Feshfield Lane Brickworks in East Sussex 5 02 Timber structure Above the plinth wall the house is constructed of prefabricated timber frame cas settes The photo shows the western gable at the south corner The engineered timber studs and rafters can be seen between the Oriented Strand Board OSB sheathing Soft wood plates separate the upper and lower sections of the cas settes 5 03 Timber cladding The cladding of the house is made from coppiced sweet chestnut which has been cut and glue laminated together to form lo
46. sulating material which allows light and solar energy to pass through whilst providing thermal insulation This restricts heat loss at night from the trombe wall Its outer layer is a solar shading device which is designed to allow winter sun to penetrate the glazed panel but keep it predominantly shaded in the warmer months to prevent overheating of the interior The house is equipped with a mechanical ventilation system which has a special heat recovery feature Known as me chanical ventilation and heat recovery MVHR this electrical box of fans and filters is installed in the loft and connected to four air ducts These pipes supply air to the living spaces of the house and remove warm moist air from the wet spaces bathroom WC and kitchen The system automatically controls the ventilation of the house and is able to extract ap preciable heat from the stale outgoing air and transfer it into the fresh incoming air The house has a large array of solar thermal panels which use the sun s energy to heat water and this heat is collected into a giant 9 000 litre underground insulated heat store which acts like a thermal battery It will store excess solar energy from the summer months for use in the lean winter months It works in conjunction with a traditional hot water cylinder inside the house and this maintains the water at the correct temperature either directly from the solar panels from the underground heat store or perhaps in late wint
47. t LEC REAR m zd E j x mi Pi Heat store and hot water cylinder The single biggest innovation in the Exhibition house is the underground inter seasonal heat store IHS It acts like a giant heat battery conserving excess solar heat from the summer months so that it can be used in the depths of winter It is buried 5m in the ground in the garden The concrete tank holds 9 000 litres of water at temperatures of up to 90 Celsius The control system in the bathroom cupboard will automatically draw heat from the store in the winter when the solar thermal panels do not make enough heat to get the domestic hot water supply the water that comes out of the taps up to temperature It is calculated that the IHS will provide useful heat for the house until January February From this point until the solar thermal panels start to make meaningful heat for the house perhaps around March April the electric immersion heater fitted inside the hot water cylinder in the loft will provide the eo e s a d S 5 LE 2 j EN JAN JUNE DES above This diagram illustrates the energy generated through a typi cal solar year relative to the heating demands of a household The dotted line denotes the available solar energy and the two dash lines denote the domestic hot water demand flat and the space heating demand Note that there is surplus solar energy through the summer months but not eno
48. ugh in the winter months Thus the idea for stor ing the excess solar energy in an underground heat store has been adopted at Exhibtion house 16 7 00 Building services overview 7 05 The building services in detail required top up heating The system has been designed to be self regulating The homeowner may want to increase or decrease the tempera ture of the hot water and this can be done by adjusting the programme on the control system The inter seasonal heat store IHS is accessed via a manhole in the garden about two thirds the way up the curved ramp There is no need for frequent access however should the homeowner need to provide access to the IHS it is important to Ensure the operative entering the chamber is suitably certified to access the chamber and that they have the necessary breathing apparatus Ensure the water level has been pumped out to a level where access is safe Ensure the temperature of the water is at safe levels turn off the supply of heat to the tank well in advance of accessing the tank For more information on the IHS and the health and safety issues please refer to the O amp M manual above left The inverter red box converts the DC current from the PV panels into AC current and the LCD screen shows current energy generation and a cumulative tally in kilowatt hours The DC isola tor switch is visible just to the left and the AC isolator is visible just below above rig
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