On 7 Nov 2006 13:15:45 -0800, "Alex" wrote:
wrote:
There's no harm in having an oversize unit for a year until you do the
addition. The bigger question is, did they do a manual J to figure
out what size you needed? 4 tons sounds like a hell of a lot of
capacity for 2100 sq ft. average construction house. Also, they should
have verified that they can get proper ducting to the new area as well,
figured out how it's gonna be done, etc, so that it can be integrated
in. I would have made sure of that, so there are no surprises later on.
Ducting to the garage shouldn't be a problem... the attic is pretty
much open and the duct work from what I can tell can be easily patched
in.

As for the 4 ton for 2100 square feet, it's my understanding that 1 ton
is suggested per 500 square feet, so 4 tons for 2000 square feet. Is
this not correct? We're at 1660sqft now, and the AC is installed and
working. It's blowing more air then I thought, but the intsallers said
once the addition is added that will go away.

My house is no doubt completely different than yours (built in 1930
with full basement, 2 floors, and full attic), but for the 2,450
square feet we have, our AC is a 3-ton unit, so I agree with Trader4
on the opinion that you may have bought an oversized unit for your
ultimate house.