A2Dominion- North Harrow
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as PDF Retrofit of 2 x Semi detached houses via external insulation allowing tenant to remain in residence during construction
Retrofit for the future ZA568E
A2Dominion- North Harrow : 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 | 197 kWh/yr | 572 kWh/yr | - |
|---|---|---|---|
| Natural gas use | 213 kWh/yr | 532 kWh/yr | - |
| Oil use | - | - | - |
| LPG use | - | - | - |
| Wood use | - | - | - |
| Other Fuel | - | - | - |
| Pre-development | Forecast | Measured | |
| Primary energy requirement | 5 kWh/m².yr | 14 kWh/m².yr | - |
|---|---|---|---|
| Annual CO₂ emissions | 1 kg CO₂/m².yr | 3 kg CO₂/m².yr | - |
| Annual space heat demand | - | 31 kWh/m².yr | - |
Renewable energy
| Electricity generation | Forecast | Measured |
|---|---|---|
| Photovoltaic panels | 4 kWh/yr | - |
| solar thermal panels | 10 kWh/yr | - |
| Electricity consumed by generation | - | - |
| Primary energy requirement offset by renewable generation | 14 kWh/m².yr | - |
| Annual CO₂ emissions offset by renewable generation | 3 kg CO₂/m².yr | - |
Calculation and targets
| Whole house energy calculation method | SAP |
|---|---|
| Other whole house calculation method | - |
| Energy target | Retrofit for the Future |
| Other energy targets | - |
| Forecast heating load | 53 W/m² demand |
Airtightness
| Date | Result | |
| Pre-development air permeability test | - | - |
|---|---|---|
| Final air permeability test | - | - |
Project description
| Stage | Under construction |
|---|---|
| Start date | 08 March 2010 |
| Occupation date | 21 April 2010 |
| Location | Harrow London England |
| Build type | Refurbishment |
| Building sector | Public Residential |
| Property type | Semi-Detached |
| Construction type | Solid Brick |
| Other construction type | Uninsulated, pebble dashed finish |
| Party wall construction | solid brick |
| Floor area | 144.5 m² |
| Floor area calculation method | Treated Floor Area (PHPP) |
| Building certification |
Project Team
| Organisation | Breyer Group PLC |
|---|---|
| Project lead person | Breyer Group |
| Landlord or Client | A2Dominion |
| Architect | Cole Thompson Anders |
| Mechanical & electrical consultant | ZBP |
| Energy consultant | ZBP |
| Structural engineer | |
| Quantity surveyor | Breyer Group |
| Consultant | |
| Contractor | Breyer Group |
Design strategies
| Planned occupancy | 5 x people. |
|---|---|
| Space heating strategy | High efficiency gas fired boiler |
| Water heating strategy | As above plus solar hot water panels |
| Fuel strategy | High efficiency gas fired boiler |
| Renewable energy strategy | Roof mounted PV and Solar hot water panels |
| Passive Solar strategy | |
| Space cooling strategy | |
| Daylighting strategy | Glazing position and size as existing |
| Ventilation strategy | Passivent with trickle vents to glazing |
| Airtightness strategy | 4 m3/hr/m2 |
| Strategy for minimising thermal bridges | Overlapping insulation. External insulation covering existing building fabric ensures limited thermal bridges |
| Modelling strategy | SAP |
| Insulation strategy | External insulation throughout, with ground floor insulation to raised ground floor |
| Other relevant retrofit strategies | Ready for immediate roll out. No decant required, no planning permission required, no technologies specified with tenant interaction, no specialist materials of limited availability.. |
| Contextual information |
Building services
| Occupancy | NULL |
|---|---|
| Space heating | NULL |
| Hot water | NULL |
| Ventilation | NULL |
| Controls | NULL |
| Cooking | NULL |
| Lighting | NULL |
| Appliances | NULL |
| Renewable energy generation system | NULL |
| Strategy for minimising thermal bridges | NULL |
Building construction
| Storeys | |
|---|---|
| Volume | - |
| Thermal fabric area | - |
| Roof description | NULL |
| Roof U-value | 0.00 W/m² K |
| Walls description | NULL |
| Walls U-value | 0.00 W/m² K |
| Party walls description | NULL |
| Party walls U-value | 0.00 W/m² K |
| Floor description | NULL |
| Floor U-value | 0.00 W/m² K |
| Glazed doors description | NULL |
| Glazed doors U-value | 0.00 W/m² K - |
| Opaque doors description | NULL |
| Opaque doors U-value | 0.00 W/m² K - |
| Windows description | NULL |
| Windows U-value | 0.00 W/m² K - |
| Windows energy transmittance (G-value) | - |
| Windows light transmittance | - |
| Rooflights description | NULL |
| Rooflights light transmittance | - |
| Rooflights U-value | 0.00 W/m² K |