How often should I need to change my furnace/central air filter? - furnace air filters
My furnace and the same central airways. How often should the filter? (I use the 3M brand Filtrete).
The inspector said that once every 3 months, installed the man who said a central air conditioning, once a month.
Furnace Air Filters How Often Should I Need To Change My Furnace/central Air Filter?
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