Is it true that High Efficiency furnaces/air conditioners run better with the cheaper air filters?
Was told that the air filters with a lower MERV rating allow the furnace/air conditioner to get air more easily and makes them run more efficiently.
Said the higher rated filters trap more pollutants (dust, animal dander, etc), but that
better to use the better filters
by not filtering the air, more of this material can penetrate and potentially clog your evaporator/i.e. reduce its efficiency
that being said, no matter what filters you use they should be checked
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