Reply by Rich

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Posted on My 1st Bill Since New AC Installed - WAS:100% Positive Flow AC in the Shop

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5989 posts in 1474 days

#1 posted 06-21-2017 09:06 PM

Well, like you said, it’s not efficient. You can take in air for the AC from anywhere with custom ductwork. The advantage of a closed system is that you are recirculating cooler air that’s already been dehumidified. With an open system, you’ll be cooling/dehumidifying outside air, so the cost to operate is going to be significantly higher.

I can appreciate your not wanting to be changing filters all the time, but is it possible to construct a multi-stage filter with a large, cheap fiberglass first stage filter that could be taken off and knocked clean? You could then taper down to a pleated filter to keep the AC innards clean.

-- Half of what we read or hear about finishing is right. We just don’t know which half! — Bob Flexner

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