Canolfan Hyddgen
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as PDF Canolfan Hyddgen - built in 2008 & occupied in January 2009 - is the UKs 1st certified Passivhaus office building located in Machynlleth, Wales. As a BREEAM excellent Multi-occupancy building with over 15 tenants it provides Bi lingual IT provision for the adjacent school, night classes, adult learning, meeting rooms, drop-in centre and council service point. JPW led the design team and partnered with the Client to satisfy a brief which demanded a building which could maximise revenue through flexible/continous use and minimise running costs via energy efficiency to create a environmentally & financially sustainable facility. Consultation with stakeholders at the earliest opportunity embedded a passivhaus approach into a design focused on local natural aesthetics & materials. On going monitoring, regular servicing and induction of building users has enabled continual reduction of energy consumption below predicted for the last 4 years.
Canolfan Hyddgen : 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 | 01 January 2009 |
| Location | Machynlleth Powys Wales |
| Build type | New build |
| Building sector | Commercial |
| Property type | Detached |
| Construction type | Other |
| Other construction type | External Timber Frame Envelope |
| Party wall construction | |
| Floor area | 410 m² |
| Floor area calculation method | Treated Floor Area (PHPP) |
| Building certification |  Passivhaus certified building |
Project Team
| Organisation | JPW Construction |
|---|---|
| Project lead person | John Williamson |
| Landlord or Client | Powys County Council |
| Architect | JPW Construction |
| Mechanical & electrical consultant | |
| Energy consultant | |
| Structural engineer | |
| Quantity surveyor | |
| Consultant | JPW Construction |
| Contractor | C. Sneade |
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 | |
| Ventilation | |
| Controls | |
| Cooking | |
| Lighting | |
| Appliances | |
| Renewable energy generation system | |
| Strategy for minimising thermal bridges |
Building construction
| Storeys | |
|---|---|
| Volume | - |
| Thermal fabric area | - |
| Roof description | |
| Roof U-value | - |
| Walls description | |
| Walls U-value | - |
| Party walls description | |
| Party walls U-value | - |
| Floor description | |
| Floor U-value | - |
| 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 | - |