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Furnace Filter Comparison
QUESTION:I am in the process of adding central air to an existing furnace
system. The system currently includes a Honeywell electronic air
cleaner made in 1976. As part of the addition, I am considering
replacing the old Honeywell with an Envirosept Electronic Furnace
Filter, which sounds pretty good just from browsing the Net.
My question is, would this new unit be much more effective (or less
effective) than the old one? I know the old one is working to some
extent, since I can see the dirt come off when it gets cleaned.
ANSWER: Media air filters typically filter the air better than standard
fiberglass filters. However they have much more resistance to air flow
than standard air filters. Typically, they reduce measured overall air
flow by 10% to 20%. If you add an AC coil to your existing furnace,
you will be reducing air flow some with it. The electronic air filters
usually have low resistance to air flow, I would stick with the
existing electronic filter. Electronic filters are usually more
effiient than media filters as well.
Remember: Air Conditioning begins with AIR!
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