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Changing two air filters after 3 months: one was dirty but one was quite clean
tomtomtom
Member Posts: 35
I changed the filters last weekend. The big 30x20 filter in the lobby was quite dirty but the smaller 20x20 in the master bedroom was really clean (almost like new). Is this normal? Thanks!
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Thanks everyone! A tissue paper was sucked to the grille when I tested it so it's definitely working. Maybe it's cleaner in the bedroom which is closed most of the time0
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You have to think of your homes scorched air heating system like a farm tractor air filter.
It is pulling in huge amounts of return air into the intake plenum at a low pressure gradient and the
more dirt, dander and mites it pulls into the filter the more resistance and the more the increase in pressure gradient Hg occurs.
This reminds me of the place where I used to work. They were using an air handler to heat the building
and they had a full pallet of water valves in front of the air handlers intake air screen inlet.
They were told to remove the pallet of valves and store it somewhere else and for two days the air
in the shop was cleaner and warmer.
Then they put the pallet of valves back 2 days later blocking the air handler again saying: "We had no place to store the valves". It was absolutely "Genius".
You would be very surprised how changing a homes air filters would improve the air flow and air quality if they were changed every three weeks in a heating season or air conditioning season.
The only time the air ducts were cleaned in my parents home was just before dad sold it after 50 plus years so you can just imagine all the dust that was blowing through the "dust" work.
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