When is mechanical ventilation needed in a non-airtight home? Read on for a data-driven answer….

The need for mechanical ventilation in non-airtight homes is much debated and rarely answered. This experiment at Envirotecture director Andy Marlow’s own home provides much needed data on the issue, read on here


Andy joined Dick Clarke at Envirotecture as a young architect, gaining significant experience in designing genuinely sustainable buildings, both residential and non-residential, in Australia and overseas. After a stint at a large corporate practice, Andy returned to Envirotecture as a director in 2014. He went on to found Passivhaus Design & Construct in 2020, in order to make Passivhaus performance more accessible for more people.
Occasional news, ideas and invites.
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