I have a 2334 sg. Foot log home it has 2 3.50 ton units 1 of the units runs twice as much as the other.these are brand new units been in house less than year.Had the heat and air company back out to my house 4 times can't really tell me why they have closed down some vents at units didn't really help.1 unit runs 1 side of house 1 runs the other.this is a 2 story house.Any help would be great.