Quote:
Originally Posted by dewilson58
What size???
MERV on Amazon is the way to go.
Should be $25 to $40.
Should change every six months.
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Carrier installer said unless you have a cat or dog, the 4"filter
that came with my system should be changed once a year.
I believe that because for you guys that change your filter every 3-6 months, remember those systems
don't run that much in the winter besides on cool days.
So in November to February you could be throwing out a slightly dirty filter.