A furnace filter should be changed about once every three months. A furnace filter should be changed more often in the event of pollen, construction dust, cold spells, or other amplifying factors.
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Someone changing out HVAC filter in unit - Bill Oxford/Getty Images There's nothing better than feeling that first blast of warm air when you finally give in and crank up the furnace because of the ...
Q: I turned on my furnace for the first time this year, and it made the whole house smell musty. I checked the filter and found it caked with dust, so I replaced it with a new filter, and the indoor ...
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