Passivhaus Site, Whittier Road, Leicester

The Passivhaus standard

The key criteria for Passivhaus certification are:

Space Heating Demand ≤ 15k Wh/m2yr

Heating Load ≤ 10 W/m2

Primary Energy Demand ≤ 120kWh/m2yr

Airtightness target 0.6ACH(n50)

Frequency of overheating ≤ 10% over 25°C

Dwellings on the Saffron Acres site are certified according to the heating load criterion which in this case is more achievable than the heating demand criterion. Four different specifications were proposed in order to ensure that all dwellings achieve the Passivhaus standard.

Assent were delighted to be given the opportunity to be part of this very innovative and exciting scheme.