Re:equal to 81 years or regular use.
You don’t believe it?
Consider that 16 of Clinton and Obama hangers on smoking dope and what not took a helluva filtering running 24/7/365.
Which leads to the question, “What was the bill for Fabreeze over that period?”
People just vape it now. No smell, easier on the lungs too
Their assumption seems to be that the a/c system is only designed to run 8 hrs. per day. A commercial system, is made to operate 24/7.
https://www.whitehousehistory.org/keeping-cool-in-the-white-house