Carrie tech suggest cheap filters?
Last Nov had new Carrier A/C17Seer,Gas Furn,Coil and Infinity Control installed. Memorial day,Control said coil frozen, change filter. Tech came out, defrosted coil, put complete puron charge. Then 1 week later, control said, replace filter again. Different tech came said, not to use pleated filter, to use "cheap 99cent ones) as the system is so sensitive. I don't get it. So what if I wanted to add a media filter, I guess that would not work? Also when system put in,(furnace with coil on top) is in hall closet with 20x20 return, they added another return 20x20 in hall ceiling-3 feet away, and disconnected the 16x20 return that was in living room in a wall cavity. Wouldn't I need that one too? and therefore have 3 return grills? Opinions please!