Blower door tests help improve homes' energy efficiency

Even with a newly-constructed home, common leaks around sill plates, windows and doors, receptacles and switch boxes can seriously decrease energy efficiency and increase the operating costs of the home. The solution is a blower door test – a performance diagnostic tool to measure the air tightness of buildings.

Conducted by a certified energy advisor, a calibrated fan is used to temporarily create negative air pressure in the home, allowing outside air to flow through any unsealed openings or cracks. Builders and their subtrades now can easily see, correct and then design building construction practices to eliminate recurring issues of air leakage in the building envelope.

Combined with a properly designed mechanical ventilation system, air leakage reduction is the largest opportunity to improve comfort and energy efficiency in new home construction.