Just moved into a 2100 sq. ft house 2 level built in 1952. The house has a brand new 4 ton 13 seer gas package unit. On the lower floor there is one 20x30 return air and the temp (72) stays fairly constant. The second story has two supply vents (1 on each end of the room), but it is 10 - 12 degrees warmer than the lower level. There is no return on the second floor.
My question is this...would adding a return to the second floor make much difference in the cooling of the space?
I believe it would have been better to put in a seperate unit for this floor, but the owner before me went ahead with this unit. I am just trying to do the best with what I have.
Any help would be great.