is it always better to use a thicker filter in furnace?
Bob F wrote:
"dpb" wrote in message ...
james wrote:
My furnace was installed with a 16x20x1 pleated filter.
It looks like there is enough space to fit a 16x20x2 filter. This should last
longer and reduce air resistance.
Is there any reason not to?
How can doubling the thickness _reduce_ resistance?
It doubles the surface area.
?????
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