Onslow Gardens
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as PDF EnerPHit in Muswell Hill with ground floor rear extension. A 4 bedroom house over four floors with an unusual existing layout which was reconfigured.
Onslow Gardens : 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 | - | 20 kWh/m².yr | 20 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 | - | - |
| Annual CO₂ emissions offset by renewable generation | - | - |
Calculation and targets
| Whole house energy calculation method | PHPP |
|---|---|
| Other whole house calculation method | - |
| Energy target | EnerPHit |
| Other energy targets | - |
| Forecast heating load | 12 W/m² demand |
Airtightness
| Date | Result | |
| Pre-development air permeability test | - | - |
|---|---|---|
| Final air permeability test | - | - |
Project description
| Stage | Occupied |
|---|---|
| Start date | 01 October 2017 |
| Occupation date | 01 December 2017 |
| Location | London London England |
| Build type | Refurbishment |
| Building sector | Private Residential |
| Property type | Semi-Detached |
| Construction type | Solid Brick |
| Other construction type | |
| Party wall construction | |
| Floor area | 246 m² |
| Floor area calculation method | Treated Floor Area (PHPP) |
| Building certification |  Passivhaus certified building |
Project Team
| Organisation | |
|---|---|
| Project lead person | Dominic ORiordan |
| Landlord or Client | Private |
| Architect | Dominic ORiordan |
| Mechanical & electrical consultant | Hagop Heath-Matossian |
| Energy consultant | |
| Structural engineer | Form London |
| Quantity surveyor | |
| Consultant | |
| Contractor | Bow Tie Construction |
Design strategies
| Planned occupancy | |
|---|---|
| Space heating strategy | |
| Water heating strategy | |
| Fuel strategy | |
| Renewable energy strategy | |
| Passive Solar strategy | |
| Space cooling strategy | |
| Daylighting strategy | |
| Ventilation strategy | |
| Airtightness strategy | |
| Strategy for minimising thermal bridges | |
| Modelling strategy | |
| Insulation strategy | |
| Other relevant retrofit strategies | |
| Contextual information |
Building services
| Occupancy | |
|---|---|
| Space heating | |
| Hot water | New System boiler 27kW |
| Ventilation | Paul, Novus 450Ventilation system with heat recovery system with an efficiency of 90%. The air handler is located on the ground floor near the entrance door within the building envelope. |
| Controls | |
| Cooking | |
| Lighting | |
| Appliances | |
| Renewable energy generation system | |
| Strategy for minimising thermal bridges |
Building construction
| Storeys | 4 |
|---|---|
| Volume | - |
| Thermal fabric area | - |
| Roof description | Pitched roof - 200mm Xtratherm EPS, flat roof 200mm Kingspan TR7 |
| Roof U-value | 0.11 W/m² K |
| Walls description | 200mm Jablite EPS, 150mm XPS below ground, Icynene sprayfoam used in some key areas of basement to overlap external wall insulatin and slab insulation |
| Walls U-value | 0.16 W/m² K |
| Party walls description | |
| Party walls U-value | - |
| Floor description | 180mm Kingspan TF70 |
| Floor U-value | 0.11 W/m² K |
| Glazed doors description | |
| Glazed doors U-value | - - |
| Opaque doors description | |
| Opaque doors U-value | 0.59 W/m² K uninstalled |
| Windows description | RATIONEL AURAPLUS TRIPLE GLAZED WINDOW4-20-4-18-6,8 Energy Std TghU g-value = 0.53 W/(m2K)g -value = 52 %Rationel, AURAPLUSExt: RAL9010 - Pure white / Int: RAL9010 - Pure WhiteGroove for window boardU w-value = 1.24 W/(m2K) |
| Windows U-value | 0.52 W/m² K - |
| Windows energy transmittance (G-value) | - |
| Windows light transmittance | - |
| Rooflights description | |
| Rooflights light transmittance | - |
| Rooflights U-value | - |