I recently purchased a new home and feel the A/C is running way too much. Set at 74 on an 85 low humidity day the A/C runs 45-50min per hour for 16 hours a day. After some quick searches I think the main factor is related to the return/filter sizes.
The house is 3300sq ft. The Furnace and A/C units are Carrier, the A/C is a 4 ton unit (24ABB348). I have multiple returns in the house feeding into one 24x10 return ending with a 16x24 Air filter at the furnace. I believe from reading this forum that my return/filter setup would be more in line with a 2ton unit. The calculations start getting a little confusing, but am I wrong in thinking that the ducts/filter should be almost double this size, obviously a load calc would determine much more accurately but is it possible that there is a scenario where this setup would actually work properly?
I have the HVAC company coming today to "take a look" and would like to at least have a better idea of the things we should look at.