Technical Information
- Internal floor width 4.0m
- Internal height 2.4m at highest point
- Internal width 4.8m or 6.8m at widest point
- External footprint width 4.4m
- External width at widest point 5.4m
- External overall height 3.2m
- External height with floor at ground level (feet 0.5m below ground level) 2.7m
Wide
- Internal floor width 6.0m
- Internal height 2.4m at highest point
- Internal width 6.8m at widest point
- External footprint width 6.4m
- External width at widest point 7.4m
- External overall height 3.2m
- External height with floor at ground level (feet 0.5m below ground level) 2.7m
- Finnish spruce and birch plywood structure
- Sheep’s wool insulation with polyester anti-slump, permanently treated with Borax
- Breathable cloth and airtight, foil vapour control membranes
- Triple glazed glass units
- High-performance airtight windows
- High-performance airtight exterior doors
- Solid timber interior and exterior cladding
- Water-borne acrylic paints and lacquers
- Solvent-free adhesives
- Lime exterior render
- Water and root proof roofing membrane
Tech specs
Current UK regulations 2010 |
Future UK regulations 2016 |
Passivhaus requirements |
Standard building |
Green Unit |
|
Floor insulation |
0.25W/m²K |
TBD |
0.15W/m²K |
0.22W/m²K |
0.15W/m²K |
Wall insulation |
0.35W/m²K |
TBD |
0.15W/m²K |
0.3W/m²K |
0.15W/m²K |
Ceiling insulation |
0.25W/m²K |
TBD |
0.12W/m²K |
0.24W/m²K |
0.12W/m²K |
Airtightness |
10m³/hr/m² |
3m³/hr/m² |
0.6m³/hr/m² |
10+ m³/hr/m² |
0.6m³/hr/m² |
Air changes per hour |
10ach |
3ach |
0.6ach |
7ach |
variable to 10ach |
Air quality |
Medium |
Medium |
High, filtered |
Medium |
High, filtered |
Air moisture content |
30% – 60% |
30% – 60% |
35% – 55% |
Below 40% |
45% – 50% |
Comfort temperature |
Not specified |
Not specified |
17⁰ – 20⁰ |
22⁰ |
17⁰ – 19⁰ |
Annual energy use per annum |
Not specified |
39 – 46 kWh/m² |
15kWh/m² |
200 kWh/m² |
15kWh/m² |
Embodied energy |
Not measured |
44% – 60% reduction |
Minimum possible |
129 – 239 kW/m² |
81 kW/m² |
Recyclability |
No requirement |
No requirement |
Encouraged |
Low recyclability |
Fully recyclable |
Testing procedure |
SAP |
SAP |
Physical test |
SAP |
Physical test |