I have a 3-year-old Trane HVAC furnace and AC system for my house (tuned & cleaned yearly). When the filter is brand new the unit works great, and is appropriately sized for my home.
However, after about 3 months I find the unit will sometimes have hard a time keeping up during extreme cold (for North Texas) 20-30 degrees, or extreme hot 95+. The outside air vent is also set to lockout during those extreme temps, so no outside air is coming in the house.
Once I replace the filter, it will go back to working fine. I have tried both OEM Honeywell & 3M filters (Merv 11), and the 4" filters say they are supposed to last 12 months! My house is kept very clean - is this just marketing lies, or is there another reason these filters are only lasting me 3 months?
Thanks!
However, after about 3 months I find the unit will sometimes have hard a time keeping up during extreme cold (for North Texas) 20-30 degrees, or extreme hot 95+. The outside air vent is also set to lockout during those extreme temps, so no outside air is coming in the house.
Once I replace the filter, it will go back to working fine. I have tried both OEM Honeywell & 3M filters (Merv 11), and the 4" filters say they are supposed to last 12 months! My house is kept very clean - is this just marketing lies, or is there another reason these filters are only lasting me 3 months?
Thanks!