The London council of Ealing has appointed McLaren Construction to deliver 188 new homes following the Passivhaus principles.
Passivhaus buildings must follow strict energy efficient design standards to maintain an almost constant temperature.
They are designed to have a continuous airtight outer shell. Leakage through any gaps must be less than 0.6 of the total house volume, per hour, at 50 Pascals pressure. This rate is known as Air Changes per Hour (ACH50), measured in a process known as a blower door test.
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