Air-Tightness & Infiltration

Air leakage routes; testing (blower door); infiltration losses; design strategies to minimize.

10 min read · Jacob Willis, Net Zero Lead

Insulation slows conductive heat loss, but air leakage - uncontrolled draughts through gaps in the fabric - can waste just as much energy. A beautifully insulated but leaky building still feels cold and costs a fortune to heat.