Lena Gardens
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as PDF Victorean Terrace, Passiv haus specification, heat demand 9 kWh/m2/annum, conservation area, triple glazed sash windows, passiv haus specification, special ground heat exchanger for ventilation, all thermal bridges removed, joists seperated from external walls. four floors plus 1/2 cellar all habitable areas.
Lena Gardens : Project images
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Fuel use
| Pre-development | Forecast | Measured | |
| Electricity use | 50 kWh/yr | - | - |
|---|---|---|---|
| Natural gas use | - | - | - |
| Oil use | - | - | - |
| LPG use | - | - | - |
| Wood use | - | - | - |
| mains gas | - | - | - |
| Pre-development | Forecast | Measured | |
| Primary energy requirement | 1 kWh/m².yr | - | - |
|---|---|---|---|
| Annual CO₂ emissions | - | - | - |
| Annual space heat demand | 2502 kWh/m².yr | 9 kWh/m².yr | - |
Renewable energy
| Electricity generation | Forecast | Measured |
|---|---|---|
| Solar pv | - | - |
| 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 | |
| Other energy targets | - |
| Forecast heating load | - |
Airtightness
| Date | Result | |
| Pre-development air permeability test | - | 250m³/m².hr @ 50 Pascals |
|---|---|---|
| Final air permeability test | 12 August 2010 | - |
Project description
| Stage | Under construction |
|---|---|
| Start date | 01 February 2010 |
| Occupation date | 16 July 2010 |
| Location | Hammersmith London England |
| Build type | Refurbishment |
| Building sector | Private Residential |
| Property type | Mid Terrace |
| Construction type | Solid Brick |
| Other construction type | |
| Party wall construction | |
| Floor area | 235 m² |
| Floor area calculation method | Treated Floor Area (PHPP) |
| Building certification |
Project Team
| Organisation | Builder/Designer plus architect plus design technician |
|---|---|
| Project lead person | Philip Proffit |
| Landlord or Client | Tom Pakenham |
| Architect | Tom MacMillan-Scott |
| Mechanical & electrical consultant | Ryder Strategies Europe Ltd |
| Energy consultant | Ryder Strategies Europe Ltd |
| Structural engineer | Brian Jams RSJ Associates |
| Quantity surveyor | None |
| Consultant | None |
| Contractor | Ryder Strategies Europe Ltd |
Design strategies
| Planned occupancy | 16 Aug 2010 |
|---|---|
| Space heating strategy | Heat Exchanger with heat recovery, pre-ground to air heat exchanger, additional 1.5 kW heater in outlet from heat revovery unit, by-pass on heat recovery exchanger. Heat pump from ventilation exhaust. |
| Water heating strategy | Solar drain back system with back-up heat pump from ventilation exhaust. 600l storage. |
| Fuel strategy | Electicity, plus gas hob |
| Renewable energy strategy | Solar pv panels |
| Passive Solar strategy | Passive gain through windows, internal blinds. Window designed andbuilt by Ryder Strategies Europe limited to look exactly like sash from the outside, but with 0.58 U value glass and insulated frames plus air-tight. |
| Space cooling strategy | Automatic ventilation on top floor, windows open during overheating times, air to ground heating to overide summer cooling |
| Daylighting strategy | |
| Ventilation strategy | Ground to air heat exchanger, followed by heat revovery heat exchanger driven by two balanced fans |
| Airtightness strategy | Very stric set of priciples and rules with drawing details at difficult connections etc Removal of all chimneys with external chimney stack outside insulation envelope above loft extension. |
| Strategy for minimising thermal bridges | All thermal bridges have been dealt with and calculated |
| Modelling strategy | PHPP used as main development tool for the design of the building |
| Insulation strategy | 0.1 internal insulation external floor walls and roof. Insulatioon of party walls |
| Other relevant retrofit strategies | Complete separation of joists from external walls to eleimate condensation/thermal bridging. Kitchen side extension built with Steico studs and clad with brick. |
| Contextual information | Building has a number of unique design features. Design has not been compromised by loss of space from insulation, removal of chimney breasts almost balances out floor space lost by insulation. Windows and conservation was a major issue so we desinged and built our own windows. |
Building services
| Occupancy | " Adults + 2 Children |
|---|---|
| Space heating | 1.4 kW heat pum in ventilation |
| Hot water | 70% solar and reat heat 1.4 kW heat pump |
| Ventilation | Counterflow heat exchanger, plus pre-heat exchanger ground to air, plus auto by-pass on heat both exchangers |
| Controls | Central thermostat processor |
| Cooking | Gas/Electric |
| Lighting | LED, plus low energy lights |
| Appliances | |
| Renewable energy generation system | Solar pv on roof by Green Tomato Energy |
| Strategy for minimising thermal bridges | Identify, design and modify |
Building construction
| Storeys | 4 |
|---|---|
| Volume | 569m³ |
| Thermal fabric area | - |
| Roof description | Slate and zinc |
| Roof U-value | 0.10 W/m² K |
| Walls description | Solid brick plus 180mm Phenolic insulation on external walls, roof, 200mm on floor, (PU insulation) |
| Walls U-value | 0.10 W/m² K |
| Party walls description | double and triple solid brick, 50mm phenolic insulation |
| Party walls U-value | 0.26 W/m² K |
| Floor description | Various, Concrete slab with 200mm PU insulation, ventilated suspended with 200mm PU on top of joists, 150mm PU insulation in 1/2 cellar |
| Floor U-value | 0.10 W/m² K |
| Glazed doors description | Triple glazed air tight |
| Glazed doors U-value | 0.80 W/m² K - |
| Opaque doors description | Not designed yet, front door identicle in apopearence to original with two triple glazed panels |
| Opaque doors U-value | 0.70 W/m² K - |
| Windows description | Triple glazed and airtight sash look alike, insulated airtight frames |
| Windows U-value | 0.80 W/m² K - |
| Windows energy transmittance (G-value) | - |
| Windows light transmittance | - |
| Rooflights description | Triple glazed Velux |
| Rooflights light transmittance | - |
| Rooflights U-value | - |