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Old 08-07-2009, 02:07 PM   #1
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Second Story house cooling question.


Okay I just bought this house and notice a difference in temperature between the 1st and 2nd floor.

Let me give some background. I live in Houston, TX so the humidity is high and temps can get to 102-104 every day. My two units outside are new (Goodman) Seer 13 4ton and seer 13 2.5ton. Downstairs cools perfectly. My house during the day does get hit with the sun all day.

I am use to 2nd story homes (like my last one) when I turn the temp to 75F on a hot day, it actually reaches 75. During a hot day upstairs can reach 86-87F. I have had the coils/air handler inspected/replaced one.

So my question is what would be the best way to cool off the top floor, or at least my big computer room.

1. Solar attic fan
2. Radiant barrier
3. Portable A/C and dehumidifier and turn on only when I am upstairs.

Any other suggestions? Thanks for your time.

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Old 08-07-2009, 05:50 PM   #2
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Second Story house cooling question.


How big an area is the up stairs?

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Old 08-07-2009, 08:18 PM   #3
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Second Story house cooling question.


If this has an attic how much insulation is there?
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Old 08-07-2009, 10:39 PM   #4
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Second Story house cooling question.


1100sqft more or less. The attic is pretty insulated. A good 3" of yellow fiberglass that looks blown in...
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Old 08-07-2009, 10:43 PM   #5
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Second Story house cooling question.


3 inch of insulation is about an R-12/13 you need to be in the area of R-38. About 12" of blown insulation would help. You would be suprised what another 9 or 10 inches will do.

1 inch of blown insulation equals approx R-3
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Old 08-08-2009, 05:18 AM   #6
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Second Story house cooling question.


Add radiant roof barrier, and get more insulation.

3" is a joke for an attic.
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Old 08-08-2009, 07:35 AM   #7
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Second Story house cooling question.


I'm in the North & I have 12" of insulation = R38
More for heat retention in the winter
But without it the summer sun will bake the 2nd floor
If there are any soffit vents make sure you do not block them
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Old 08-08-2009, 02:52 PM   #8
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Second Story house cooling question.


4 Tons of cooling for 1100 sqft? Dosent that seem a little over kill guys. You should have no problem cooling but maby a problem controlling humidity due to short cycling. It sounds like you may have somthing not operating correctly. What is the temp drop from the return to the supply?
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Old 08-08-2009, 04:33 PM   #9
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Second Story house cooling question.


I don't see that he said the 4 ton unit does the 110 sq ft.

But, I do see that he says the outdoor units are new.
Taking that to mean they are mismatched to some old air handlers.
Which could be causing trouble.
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Old 08-08-2009, 06:21 PM   #10
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Second Story house cooling question.


Quote:
Originally Posted by darktiger View Post
Okay I just bought this house and notice a difference in temperature between the 1st and 2nd floor.

Let me give some background. I live in Houston, TX so the humidity is high and temps can get to 102-104 every day. My two units outside are new (Goodman) Seer 13 4ton and seer 13 2.5ton. Downstairs cools perfectly. My house during the day does get hit with the sun all day.

I am use to 2nd story homes (like my last one) when I turn the temp to 75F on a hot day, it actually reaches 75. During a hot day upstairs can reach 86-87F. I have had the coils/air handler inspected/replaced one.

So my question is what would be the best way to cool off the top floor, or at least my big computer room.

1. Solar attic fan
2. Radiant barrier
3. Portable A/C and dehumidifier and turn on only when I am upstairs.

Any other suggestions? Thanks for your time.

I take it as 4 tn downstairs and 2.5 upstairs
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Old 08-08-2009, 07:14 PM   #11
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Second Story house cooling question.


Quote:
Originally Posted by beenthere View Post
I don't see that he said the 4 ton unit does the 110 sq ft.

But, I do see that he says the outdoor units are new.
Taking that to mean they are mismatched to some old air handlers.
Which could be causing trouble.

He didn't say 110 sqft
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Old 08-08-2009, 07:17 PM   #12
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Second Story house cooling question.


Lol
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Old 08-08-2009, 09:30 PM   #13
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Second Story house cooling question.


Quote:
Originally Posted by beenthere View Post
I don't see that he said the 4 ton unit does the 110 sq ft.

But, I do see that he says the outdoor units are new.
Taking that to mean they are mismatched to some old air handlers.
Which could be causing trouble.
I missed the period between (13 2.5ton).( Downstairs cools perfectly) I need to slow down my reading.

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