The Washington State Department of Commerce has released, "Evergreen Sustainable Development Standard Version 3.0." Below are notes as related to residential airtightness testing:
Section 5.11: Airchange on...Read More
By Colin Genge, President, Retrotec Inc.
Even though blower door and duct testing has been around since the ‘80s, there’s still the occasional question about the necessity of air leakage testing versus just going through with visual inspections. This is sometimes followed with arguments about equipment expense, training time, or that homeowner money could be better spent elsewhere – the “bang for your buck” model.
Duct leakage to outdoors tests are needed, even if duct work is within the conditioned space
If ducts are installed completely within the conditioned space do we need to test them? The International Energy Conservation Code (IECC) requires we only test duct work if it is outside the conditioned space, such as an un-...Read More
Theatrical smoke is a very effective way to find leaks in a duct system. A quick check will point out smoke as it spills from pressurized leak locations. Leaks in attics and crawlspaces that can be hard-to-detect are no problem with this method. This type of detection is called theatrical for a...Read More