new trane hvac system (how big should return be)
I'm not an HVAC expert but I've recently had an HVAC system installed in my row home (Trane TUD080R furnace and 2TTX4030 condenser). The job is near complete and by chance I had a guy in there the other day not associated with the company who installed it who told me the return for the unit is too small. He also mentioned that the thermostat should be on the first floor and not the second (top) floor. He said the way it is not, the coils will freeze because the unit can't draw enough from the return.
Is there any way I can find out how big the return should be?