I second JK's motion - we pretty much insist on blower door testing every foam job with which we are associated, and the results are often daunting - 100s, sometimes 1000s of wayward CFMs at 50 Pa, particularly with retrofits. (energyvanguard.com)
Using blower door tests and infrared cameras, energy audits measure air leaks and detect air infiltration or missing insulation. (nerdwallet.com)
The final blower door test result on the show house of 0.20 — coincidentally in both air changes per hour and m3 / hr / m2 at 50 Pascals — is one of the best results Passive House Plus has ever encountered, in particular for a masonry building. (passivehouseplus.ie)