1" Furnace filter interval changes
What I find peculiar are statements like:
https://filterbuy.com/how-often-do-i-re ... ac-filter/
"As your filter traps more dirt, dust, and allergens from the air, filter efficiency decreases. Find out below if you should be replacing your filter more often. "
Well, no. As the filter traps more junk, the efficiency of the filter actually increases as it now can capture smaller particles than as designed.
So while the above is biased, how often should we be changing 1" furnace filters?