Wouldn’t you think that Carrier uses a better filter in their units for a reason?
Call Munn’s Heating & A/C, have them service your HVAC system and do what they tell you. The more expensive 4-inch filters only had to be changed once a year. I’ve had Munn’s do our HVAC service twice a year for 17 years now and our HVAC still tests to the “as new” specs. Munn’s is great—professional, well-trained, and trustworthy.
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Politicians are like diapers--they should be changed frequently, and for the same reason.
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