The ventilation roller coaster
You might think the current ASHRAE 62.2 Standard is very controversial and the ventilation rate is fixed. A quick look at the history of ventilation indicates the current disagreement over 62.2 Standard is rather calm…
Continue ReadingThe history of the blower door
The blower door as we know and love it today springs from technology first used in Sweden in 1977, where it was actually a blower window. The idea migrated to the United States with Ake…
Continue ReadingBlower Door Testing
Diagnose problems in the building envelope with this simple, reliable tool. Air flowing in and out of a building can cause lots of problems; in fact, air leakage can account for 30 percent to 50 percent of the…
Continue ReadingAirtightness testing and the 2009 and 2012 IECC
The adoption of residential building codes that require more energy efficiency is one of the most exciting developments in state energy policy during the past four years. Over 30 states have now adopted codes that meet or exceed the energy efficiency requirements of the model…
Continue ReadingTightest house in the world confirmed using Minneapolis Blower Door™ System
The tightest house in the world is located in Dillingham, Alaska. In March 2013, a blower door test was conducted and measured .05 Air Changes per Hour at 50 Pascals of pressure (ACH50), which is…
Continue Reading