Name:   John C - Subject:   spray foam Date:   12/21/2016 11:22:41 AM (updated 12/21/2016 11:26:20 AM)

MrHodja, Sorry, I don't have any tips on stale air. I would leave that to the pros because I don't really understand the issue and have heard varying opinions on both sides. I can say in my particular case, all of our windows are the old aluminum kind. When the wind is blowing we can feel it inside, so I am not worried at this point about stale air or the "sick house" thing. If we end up fixing the windows, we would probably get that test (I can't remember the official name of it) but they come and shut all the doors and windows. Then they set up a seal on a particular door and then pressurize with air in order to test how well the home retains the air. It is commonly done in new construction, and then also in energy audit tests.   After I typed all this I googled it, it's a blower door test: https://www.energy.gov/energysaver/blower-door-tests