For more than 25 years, the Minneapolis Blower Door has been recognized as the best designed and supported building airtightness testing system in the world. Combined with specialized accessories and complete testing procedures developed by The Energy Conservatory (TEC), The Minneapolis Blower Door is the system of choice for building science trainers, utility programs, energy raters and auditors, HVAC contractors, builders, insulation contractors and weatherization professionals.

We carry a full line of The Energy Conservatory's products...so call us if you can't find it! We offer recalibration and repair, call for more details.