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newly installed central ac Options Djavdet 05-26-2007
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Posted by Djavdet on May 26, 2007, 11:48 pm

> Hi,
> Do you have good air flow? What is blower size(in Hp)?
> My house is R2000 spec 2.4K sqf 2 story. 3 ton unit is just doing fine.- Hide
quoted text -
>

It looks like i got 1/2 Hp blower. It's 12 years old but heats the
house ok, i did not complain.
How fast can you get 10F drop in your house?
D


Posted by mm on May 27, 2007, 2:08 am

>
>> Hi,
>> Do you have good air flow? What is blower size(in Hp)?
>> My house is R2000 spec 2.4K sqf 2 story. 3 ton unit is just doing fine.- Hide
quoted text -
>>
>
>It looks like i got 1/2 Hp blower. It's 12 years old but heats the
>house ok, i did not complain.
>How fast can you get 10F drop in your house?
>D
How long did it take for your 5F and how much longer have you waited?

What was the temp outside today? What was it in your house at the
same time, after the AC had been on for at least 4** hours.


**I don't know how long it should take, and I don't even know how big
my ac is, although it's written down here somewhere.

Posted by Djavdet on May 27, 2007, 11:49 am
>
>
> >> Hi,
> >> Do you have good air flow? What is blower size(in Hp)?
> >> My house is R2000 spec 2.4K sqf 2 story. 3 ton unit is just doing fine.-
Hide quoted text -
>
> >It looks like i got 1/2 Hp blower. It's 12 years old but heats the
> >house ok, i did not complain.
> >How fast can you get 10F drop in your house?
> >D
>
> How long did it take for your 5F and how much longer have you waited?
>
> What was the temp outside today? What was it in your house at the
> same time, after the AC had been on for at least 4** hours.
>
> **I don't know how long it should take, and I don't even know how big
> my ac is, although it's written down here somewhere.

ac was on all day..outside temperature was 95F and inside is about 89F
it really started go down when outside temperature lowered..
so it all looked to me that the ac thing only can cool down the house
when the outside temperature is low enough...
that's i started questioning the whole installation...
D


Posted by CJT on May 26, 2007, 9:58 pm
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.

--
The e-mail address in our reply-to line is reversed in an attempt to
minimize spam. Our true address is of the form che...@prodigy.net.

Posted by Ralph Mowery on May 26, 2007, 11:10 pm

> 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
>
Depending on where you are located , a 2.5 ton unit should be enough if you
have good insulation in the house. This time of year it is maybe 85 to 90
deg in the hotter areas. You should be able to get to 70 deg without any
problem.

My house is slightly under 2000 sqft and I have a Trane 2.5 ton heatpump and
it has no problem getting to 74 deg on the 95 deg days of summer, and I keep
it on 70 to72 deg in the winter with no problem or having the heat strips
kick in.



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