I'm an architect and here's why eco homes need to pass the Blower Door Test

exterior of self build with timber cladding and blue windows
(Image credit: Mark Ashbee)

Knowing what a Blower Door Test is and how to prepare for one is a crucial part of any self builder of an eco home's journey.

There are many regulations to meet and boxes to check when it comes to building environmentally-friendly houses — especially if trying to achieve Passivhaus status — and understanding the Blower Door Test process is a good place to start.

Paul Testa

Architect Paul is the director of HEM Architects and a specialist in low-energy design. HEM Architects are well-versed in designing sustainable, energy-efficient new builds and extension schemes. He has also just completed an eco retrofit to his family home.

He taught the technology course for the MArch in Architecture at Sheffield University, and is a tutor for the Sustainable Architectural Studies Masters course. 

With contributions from