Djavdet wrote:

Hi everyone,
I got my central ac installed recently. i have nearly 2K sqf 2 story
house and contractor said that trane 2 1/2 ton should be enough to
cool it at summer time. They also said that they guarantee 20F
difference after ac is on. Well, i run it now and can't get even 5F
difference in the house.. i'm just wondering what is the normal
expectation from 2.5 ton unit should be? can it perform to cool down
temperature till 70F when outside temperature is 80-85F?
there is no icing on the pipes coming out from compressor i don't
know
there should be any ice at all...
i'm kinda disappointed with it especially remembering that i paid $4k
to install it....
Thanks
D

Whether or not it's an appropriate size depends on lots of factors.

You give no indication where you are, or what the humidity is.

The "20F difference" of which they speak is probably between the
inlet and outlet of the unit. If they've guaranteed it, and it's
not happening, then call them up and make them get it right.

All that said, I think you probably should be able to cool a well
insulated 2K ft^2 house effectively with that size unit in most parts of
the country. On really hot days it might run constantly, but that's
when it is most efficient.

As a point of reference, I have a somewhat larger house in Texas, and
my 4 ton unit is probably over-sized, judging by how little it runs.

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