Unit 1 Wellington Lane, Bristol, BS6 5PY
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as PDF Demmolition of an old warehouse and construction of a new timber frame three, bedroom house built to the AECBs silver standard.
Unit 1 Wellington Lane, Bristol, BS6 5PY : Project images
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Energy and fuel use
Measured data from renewable generation is not yet available.
Fuel use
| Pre-development | Forecast | Measured | |
| Electricity use | - | 2271 kWh/yr | - |
|---|---|---|---|
| Natural gas use | - | 1538 kWh/yr | - |
| Oil use | - | - | - |
| LPG use | - | - | - |
| Wood use | - | - | - |
| Other Fuel | - | - | - |
| Pre-development | Forecast | Measured | |
| Primary energy requirement | - | 82 kWh/m².yr | - |
|---|---|---|---|
| Annual CO₂ emissions | - | 18 kg CO₂/m².yr | - |
| Annual space heat demand | - | 17 kWh/m².yr | - |
Renewable energy
| Electricity generation | Forecast | Measured |
|---|---|---|
| Renewables Technology | - | - |
| Other Renewables Tech | - | - |
| Electricity consumed by generation | - | - |
| Primary energy requirement offset by renewable generation | 82 kWh/m².yr | - |
| Annual CO₂ emissions offset by renewable generation | 18 kg CO₂/m².yr | - |
Calculation and targets
| Whole house energy calculation method | PHPP |
|---|---|
| Other whole house calculation method | - |
| Energy target | AECB Silver |
| Other energy targets | - |
| Forecast heating load | 8 W/m² demand |
Airtightness
| Date | Result | |
| Pre-development air permeability test | - | - |
|---|---|---|
| Final air permeability test | 06 December 2016 | 0.66m³/m².hr @ 50 Pascals |
Project description
| Stage | Occupied |
|---|---|
| Start date | 04 April 2016 |
| Occupation date | 02 January 2017 |
| Location | Bristol Bristol England |
| Build type | New build |
| Building sector | Private Residential |
| Property type | Mid Terrace |
| Construction type | Softwood frame |
| Other construction type | |
| Party wall construction | |
| Floor area | 91.35 m² |
| Floor area calculation method | Treated Floor Area (PHPP) |
| Building certification |  AECB silver standard certified building |
Project Team
| Organisation | Earthwise Construction Ltd |
|---|---|
| Project lead person | Ben East |
| Landlord or Client | Nick Easton & Ellie Sans |
| Architect | Lawrence Duck |
| Mechanical & electrical consultant | Green Building Store |
| Energy consultant | Peers Sadler |
| Structural engineer | Rise Structures Ltd |
| Quantity surveyor | N/A |
| Consultant | Encraft Ltd |
| Contractor | Earthwise Construction Ltd |
Design strategies
| Planned occupancy | Two people, out to work during the day time |
|---|---|
| Space heating strategy | Gas fired boiler supplying two floor heaters in first floor. MVHR system supplying recoverd heat to bedrooms/dinning room |
| Water heating strategy | Gas system boiler and hot water store |
| Fuel strategy | Mains Gas, Mains electricty |
| Renewable energy strategy | Cables installed for a 1,47 KWp array to be fitted at a later date |
| Passive Solar strategy | As the building was built between two existing dwellings, the window/doors are located on the north/south side and where optimised using PHPP |
| Space cooling strategy | Natural ventilation for most of the cooling season. Solar shades to be fitted to main windows/doors on south elevation to prevent overheating. |
| Daylighting strategy | Large quad glazed outfights where fitted to the main roof to supply the kitchen/dining roof with adequate daylight, a glass floor was installed in the first floor zone to bring daylight into the hallway and small high level windows where fitted in the ground floor wall facing the street to bring adequate daylight into the ground floor bedroom. |
| Ventilation strategy | Comfort ventilation with heat recovery (winter)Openable windows (summer) |
| Airtightness strategy | Intello Plus airtight membrane fixed to internal face of external timber frame walls, taped at joints/junctions. Alutrix airtight membrane glued to external face of plywood deck/roof structure, taped to internal airtight membrane using airtight tape.Floor fitted with visqueen membrane and wall membranes tapped to floor.Window/door junctions taped to internal membrane using airtight tape.Air pressure test results of 0.57 m3/(hr.m2) @ 50 pa |
| Strategy for minimising thermal bridges | Continuous insulation maintained throughout to minimise thermal bridges. |
| Modelling strategy | Whole house modelling was undertaken in PHPP |
| Insulation strategy | Walls:300mm of mineral wool insulation fitted between I joists with 60mm of wood fibre insulation fitted over the external face to achieve a U value of: 0.115 W/mK).Roof insulation comprising of 220mm of PIR insulation fitted externally over airtight deck, to achieve a U-Value of 0.098 W/mKFloor: 250mm of PIR insulation fitted over concrete sub floor, to achieve a U-Value of 0.107 W/mK |
| Other relevant retrofit strategies | |
| Contextual information | Compact site with planning conditions on the height of the dwelling, provided technical challenges to achieve the AECB silver standard. |
Building services
| Occupancy | Two people, at work during the day |
|---|---|
| Space heating | Gas system boiler and hot water store installed, providing heating to two floor radiators installed in first floor. Occupants have noticed that ground floor rooms are slightly colder in winter, therefore they are looking at installing a water filled heating loop, to provide some post heating to the incoming air supplied by the MVHR unit. |
| Hot water | Hot water provided by the gas system boiler. |
| Ventilation | PAUL Focus 200 MVHR unit fitted:Technical data: Capacity: 45-200 m3/h at 150Pa 93-95% Heat recovery (Passivhaus certified: 91%) electrical efficiency: 0.31 W/(m3h) |
| Controls | Nest smart digital thermostat control for heating.touch screen controling MVHR with three settings. |
| Cooking | Induction hob & electric oven |
| Lighting | 100% LED fittings through out. |
| Appliances | A+ kenwood amercian style fridge/freezer.A+ rated washing machine |
| Renewable energy generation system | Solar ready, P.V to be fitted at a later date. |
| Strategy for minimising thermal bridges | Thermal bridge free construction junctions have been aimed for |
Building construction
| Storeys | 2 |
|---|---|
| Volume | 228m³ |
| Thermal fabric area | 32939 m² |
| Roof description | 200mmx 50mm timber rafters, decked with 18mm osb3 boards, Alutrix air/vapour control glued to face of plywood, with 220mm of PIR insluation fitted over & single ply membrane glued to face of insulation. |
| Roof U-value | 0.10 W/m² K |
| Walls description | From Inside- External face:Plaster skim,Plasterboard, batten service zone,12.5mm VapAirtight boards, 300mm I studs filled with mineral wool insulation, 60mm woodfiber insulation, lime render |
| Walls U-value | 0.12 W/m² K |
| Party walls description | Party walls from Internal-ExternalLime Plaster, 60mm of wood fiber insulation, 220mm studs filled with mineral wool & cement board. |
| Party walls U-value | 0.11 W/m² K |
| Floor description | From Internal- ExternalEnginnered wood flooring layed over 22mm chipboard deck, 250mm of PIR insulation layed on Visqueen membrane, onto new concrete slab. |
| Floor U-value | 0.10 W/m² K |
| Glazed doors description | Ideal Combi Futura + doors fitted |
| Glazed doors U-value | 0.92 W/m² K installed |
| Opaque doors description | |
| Opaque doors U-value | - - |
| Windows description | Ideal Combi Futura Plus windows fitted |
| Windows U-value | 0.95 W/m² K installed |
| Windows energy transmittance (G-value) | 62 % |
| Windows light transmittance | 77% |
| Rooflights description | Fakro quad glazed rooflights |
| Rooflights light transmittance | - |
| Rooflights U-value | 1.06 W/m² K |
Unit 1 Wellington Lane, Bristol, BS6 5PY : Download Files
02_Wellington_Lane_Acceptance_Airtightness_Testing_Report.pdf (2.1 MB) 160311_3D_views.pdf (450.02 KB) Building_Users_Manual_v2.pdf (509.46 KB) PHPP_Verfication_Sheet.pdf (239.36 KB) TEC005_Standard_Wall_and_Floor_Types.pdf (275.1 KB) TEC007_Standard_Junctions.pdf (264.08 KB) TEC010_Detailed_Ground_Floor.pdf (441.69 KB) TEC020_First_Floor_Detailed_Plan.pdf (438.13 KB) TEC030_Detailed_Section_01.pdf (386.93 KB) TEC040_Detailed_Elevation_01.pdf (230.34 KB)