The home's sustainable design integrates with its urban setting by shifting the house's position for optimal solar energy. A slatted timber screen-wall provides privacy while maximising sunlight. The simple rectangular plan with a skewed roof creates double-height spaces for solar collection, ensuring energy efficiency and comfort.

Thermal envelope

Exterior wall: plastered concrete blockwork inner leaf, graphite enhanced bonded bead (0.033 W/mK) with basalt wall ties to 250mm cavity, rendered concrete block outer leaf.
U-value = 0.127 W/(m²K) 

Basement floor/floor slab: Tiles on concrete screed 100mm with underfloorheating, 150mm P.I.R. insulation (0.022 W/mK) on concrete raft foundation.
U-value = 0.14 W/(m²K) 

Roof: Plasterboard on 88mm mineral wool cross-battened insulated service cavity (0.044 W/mK), airtight membrane, 350mm timber joist and rafter with mineral wool (0.044 W/mK), wood fibre board 32mm, breather membrane and ventilated battens under zinc roofing.
U-value = 0.112 W/(m²K) 

Mechanical systems

Ventilation: Blauberg Ventilatoren GmbH Germany, Komfort EC SB350 S11
Ventilation for supply and extract air.
Airflow rate < 600 m3/h
Recuperative Heat exchanger 79 % Heat recovery rate

Heating installation: EHST17/20/30D Mitsubishi Electric Ecodan Split units FTc6 cylinders, SUZ-SWM40/60/80VA (R32) air source heat pump.

Domestic hot water: EHST17/20/30D Mitsubishi Electric Ecodan Split units FTc6 cylinders, SUZ-SWM40/60/80VA (R32) air source heat pump.

PHPP values

PE demand (non-renewable Primary Energy): 54 kWh /(m²a ) on heating installation, domestic hot water, household electricity and auxiliary electricity calculated according to PHPP 

PER demand (renewable Primary Energy): 30 kWh /(m²a ) on heating installation, domestic hot water, household electricity and auxiliary electricity calculated according to PHPP