Hanley, Stoke-On-Trent
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as PDF A whole house retrofit is achieved through detailed application of passivhaus principles to the refurbishment of a C19th terrace house, which prioritise insulation of the fabric, achieving excellent air tightness with a minimal space heating requirement, and whole house heat recovery ventilation. The aim is to make the house easy to inhabit with a low carbon footprint. The existing building has been carefully surveyed, and proposed fabric and services have been analysed using the Passive House Planning Package, which allows designers to test assumptions thoroughly, and a free exchange of ideas between architect, service engineer and contractor has allowed proposed design details to be well integrated, and assessed for practicality.
Retrofit for the future ZA114U
Hanley, Stoke-On-Trent : 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 | 1732.5 kWh/yr | 962.5 kWh/yr | 4296 kWh/yr |
|---|---|---|---|
| Natural gas use | 38725.5 kWh/yr | 2348.5 kWh/yr | 5446 kWh/yr |
| Oil use | - | - | - |
| LPG use | - | - | - |
| Wood use | - | - | - |
| Other Fuel | - | - | - |
| Pre-development | Forecast | Measured | |
| Primary energy requirement | 765 kWh/m².yr | 80 kWh/m².yr | 266 kWh/m².yr |
|---|---|---|---|
| Annual CO₂ emissions | 141 kg CO₂/m².yr | 16 kg CO₂/m².yr | 57 kg CO₂/m².yr |
| Annual space heat demand | - | 21 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 | 80 kWh/m².yr | 266 kWh/m².yr |
| Annual CO₂ emissions offset by renewable generation | 16 kg CO₂/m².yr | 57 kg CO₂/m².yr |
Calculation and targets
| Whole house energy calculation method | PHPP |
|---|---|
| Other whole house calculation method | - |
| Energy target | Retrofit for the Future |
| Other energy targets | - |
| Forecast heating load | 12 W/m² demand |
Airtightness
| Date | Result | |
| Pre-development air permeability test | - | 10.44m³/m².hr @ 50 Pascals |
|---|---|---|
| Final air permeability test | - | 4.27m³/m².hr @ 50 Pascals |
Project description
| Stage | Under construction |
|---|---|
| Start date | 01 June 2010 |
| Occupation date | 01 October 2010 |
| Location | Hanley, Stoke-On-Trent Staffordshire England |
| Build type | Refurbishment |
| Building sector | Public Residential |
| Property type | Mid Terrace |
| Construction type | Solid Brick |
| Other construction type | 215mm Thick Solid Walls |
| Party wall construction | Solid Brick Wall |
| Floor area | 63.9 m² |
| Floor area calculation method | Treated Floor Area (PHPP) |
| Building certification |
Project Team
| Organisation | Sanctuary Group |
|---|---|
| Project lead person | Cath Jordan, Sanctuary Group |
| Landlord or Client | Sanctuary Group |
| Architect | Anne Thorne Architects Partnership |
| Mechanical & electrical consultant | King Shaw Associates |
| Energy consultant | Eight Associates |
| Structural engineer | King Shaw Associates |
| Quantity surveyor | McBains Cooper |
| Consultant | Building Sciences Ltd |
| Contractor | J & S Seddon Ltd |
Design strategies
| Planned occupancy | Max. 3 person house 2 small existing bedrooms(10m2, 9.5m2) (couple with child / single parent with up to 2 children) |
|---|---|
| Space heating strategy | Heating via the MVHR system using a Water Heater battery connected to the integrated solar thermal/gas burner unit. MVHR by Maico (Passivhaus Certified) |
| Water heating strategy | Gas Solar Unit with integrated solar thermal panels (by Rotex) 6sqm Solar Thermal Panels to front roof (South-West Facing) Solar Thermal Panels provide 82% of DHW & 25% of Space Heating |
| Fuel strategy | Mains Gas Mains Electricity |
| Renewable energy strategy | Solar Thermal Panels provide 82% of DHW & 25% of Space Heating |
| Passive Solar strategy | Compact size and orientation of existing terrace proves a challenge to increase internal solar gain for the house, therefore no additional measures adopted. |
| Space cooling strategy | Summer - Natural Ventilation (openable windows) night purging during hot weather. |
| Daylighting strategy | Passivhaus certified Triple-glazed windows, roof-light to provide additional daylight to rear dining kitchen to achieve minimum average daylight factor of at least 2% |
| Ventilation strategy | Passivhaus Certified high efficiency Whole House Mechanical Ventilation Heat Recovery system. |
| Airtightness strategy | Continuous air-tight layer internally Internal membranes lapped into plaster finishes Plaster taken between first floor joists. Membranes pre-sealed to new windows and doors, details to AECB gold standard. Precompletion testing |
| Strategy for minimising thermal bridges | Thermal bridges eliminated by continuous internal insulation to walls, floor and roofs. Thermally insulating clay block work to re-built rear extension New thermally broken windows installed with thermal bridge-free details to reveals internally. |
| Modelling strategy | Passiv Haus Planning Package 2007 (English Version) SAP 2005 (version 9.81) also modeled Hevacomp modelling also used by M&E Engineer |
| Insulation strategy | Scheme design to allow for extra insulation thicknesses. Hydroscopic Sheepswool to internal solid and party walls Expanded Polystyrene to Solid Cellulose insulation or sheepswool to roof/ceiling (No phenolic foam insulants have been specified ( reduce off-gassing, better carbon payback). Existing External Walls = 0.143 W/m2K Re-built Extension Walls = 0.120 W/m2K New Solid Floor = 0.094 W/m2K Roof = 0.098 W/m2K |
| Other relevant retrofit strategies | |
| 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 |