Wake Green Road - Attempt to renovate to Passivhaus standard
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as PDF This project is an attempt to take a 1920s detached house and make it as near to passivhaus as possible, although this probably means enerPHit (if we're lucky). 300mm external EPS on three sides, internal insulation on fourth (boundary) wall together with 300mm underfloor and full loft insulation. Air tight envelope design issues included eliminating thermal bridging at eaves level caused by the need to accommodate increased wall width, and the transition from internal to external insulation on the fourth wall. Planning requires reinstatement of appearance of front of property but the rear has been totally redesigned to maximise solar gain. Green roof on one-storey extension; solar (hot water) panels; greywater recycling unit for one shower/toilet; rainwater recycling rejected due to high environmental impact/not carbon neutral.
Wake Green Road - Attempt to renovate to Passivhaus standard : 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 | - | - | - |
|---|---|---|---|
| Natural gas use | - | - | - |
| Oil use | - | - | - |
| LPG use | - | - | - |
| Wood use | - | - | - |
| Other Fuel | - | - | - |
| Pre-development | Forecast | Measured | |
| Primary energy requirement | - | - | - |
|---|---|---|---|
| Annual CO₂ emissions | - | - | - |
| Annual space heat demand | - | - | - |
Renewable energy
| Electricity generation | Forecast | Measured |
|---|---|---|
| Renewables Technology | - | - |
| Other Renewables Tech | - | - |
| Electricity consumed by generation | - | - |
| Primary energy requirement offset by renewable generation | - | - |
| Annual CO₂ emissions offset by renewable generation | - | - |
Calculation and targets
| Whole house energy calculation method | |
|---|---|
| Other whole house calculation method | - |
| Energy target | Passivhaus |
| Other energy targets | - |
| Forecast heating load | - |
Airtightness
| Date | Result | |
| Pre-development air permeability test | - | - |
|---|---|---|
| Final air permeability test | - | - |
Project description
| Stage | Under construction |
|---|---|
| Start date | 14 March 2011 |
| Occupation date | 11 November 2011 |
| Location | Birmingham West Midlands England |
| Build type | Refurbishment |
| Building sector | Private Residential |
| Property type | Detached |
| Construction type | Solid Brick |
| Other construction type | EPS to be added |
| Party wall construction | |
| Floor area | 350 m² |
| Floor area calculation method | Approximate Floor Area |
| Building certification |
Project Team
| Organisation | |
|---|---|
| Project lead person | |
| Landlord or Client | |
| Architect | Helen Seymour-Smith |
| Mechanical & electrical consultant | |
| Energy consultant | |
| Structural engineer | Salisbury Structures |
| Quantity surveyor | |
| Consultant | |
| Contractor | Linford Building Ltd |
Design strategies
| Planned occupancy | Five people, one working from home |
|---|---|
| Space heating strategy | MVHR with backups (a) multifuel stoves x2; (b) underfloor heating (gas boiler) |
| Water heating strategy | Solar with gas boiler backup |
| Fuel strategy | MVHR; wood; solar; mains electriticy; mains gas |
| Renewable energy strategy | None as yet due to cost : design provides for installation at later date |
| Passive Solar strategy | Design provides for maximum solar gain from SW facing windows |
| Space cooling strategy | MVHR |
| Daylighting strategy | |
| Ventilation strategy | MVHR (winter) openable windows (summer) |
| Airtightness strategy | |
| Strategy for minimising thermal bridges | |
| Modelling strategy | |
| Insulation strategy | |
| Other relevant retrofit strategies | |
| Contextual information |
Building services
| Occupancy | |
|---|---|
| Space heating | |
| Hot water | |
| Ventilation | |
| Controls | |
| Cooking | |
| Lighting | |
| Appliances | |
| Renewable energy generation system | |
| Strategy for minimising thermal bridges |
Building construction
| Storeys | |
|---|---|
| Volume | - |
| Thermal fabric area | - |
| Roof description | |
| Roof U-value | - |
| Walls description | |
| Walls U-value | - |
| Party walls description | |
| Party walls U-value | - |
| Floor description | |
| Floor U-value | - |
| Glazed doors description | |
| Glazed doors U-value | - - |
| Opaque doors description | |
| Opaque doors U-value | - - |
| Windows description | |
| Windows U-value | - - |
| Windows energy transmittance (G-value) | - |
| Windows light transmittance | - |
| Rooflights description | |
| Rooflights light transmittance | - |
| Rooflights U-value | - |