Bourne Lane
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as PDF This is the first certified residential Passive House in Tonbridge. Built on an urban infill site, this high quality, low energy dwelling takes inspiration from the local brickmaking past, reflecting the dark clinker bricks used in some of the neighbouring historic buildings - sections of Siberian larch add further architectural interest. The design and layout respond to the slightly sloping site and a large quadruple-glazed roof window perfectly frames the view of a protected lime tree. An ASHP provides heating and hot water and 4kw of solar panels provide electricity. The measured air tightness is 0.34 ACH at 50Pa and fresh filtered air is brought into the building by a Paul Novus 300 MVHR. The structure is a highly insulated (Warmcell) timber frame sitting on an Isoquick 300mm-deep insulated slab. Natural and low/zero VOC materials, such as zero-added formaldehyde Smartply, keep the house healthy as well as comfortable. The zinc roof is 100% recyclable at the end of its life.
Bourne Lane : 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 | Occupied |
|---|---|
| Start date | |
| Occupation date | |
| Location | Tonbridge Kent England |
| Build type | New build |
| Building sector | Private Residential |
| Property type | Detached |
| Construction type | |
| Other construction type | |
| Party wall construction | |
| Floor area | 146.5 m² |
| Floor area calculation method | Treated Floor Area (PHPP) |
| Building certification |  Passivhaus certified building |
Project Team
| Organisation | |
|---|---|
| Project lead person | |
| Landlord or Client | |
| Architect | Studio KAP Architects |
| Mechanical & electrical consultant | |
| Energy consultant | Conker Conservation |
| Structural engineer | |
| Quantity surveyor | |
| Consultant | |
| Contractor |
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 | Ecodan 4kW Air source heat pump with 200l storage tank and underfloor heating |
| Hot water | Ecodan 4kW Air source heat pump with 200l storage tank and underfloor heating |
| Ventilation | Paul Novus 300 MVHR |
| Controls | |
| Cooking | |
| Lighting | |
| Appliances | |
| Renewable energy generation system | 4kW PV |
| Strategy for minimising thermal bridges |
Building construction
| Storeys | |
|---|---|
| Volume | - |
| Thermal fabric area | - |
| Roof description | Timber frame with 405mm warmcell insulation and 38mm knauf Omifit Slab |
| Roof U-value | 0.11 W/m² K |
| Walls description | Timber frame with 300mm warmcell insulation and 38-75mm knauf Omifit Slab |
| Walls U-value | 0.13 W/m² K |
| Party walls description | |
| Party walls U-value | - |
| Floor description | Concrete slab with 300mm Isoquick EPS insulation |
| Floor U-value | 0.11 W/m² K |
| 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 | - |