DIY Chatroom Home Improvement Forum

DIY Chatroom Home Improvement Forum (http://www.diychatroom.com/)
-   HVAC (http://www.diychatroom.com/f17/)
-   -   Second Story house cooling question. (http://www.diychatroom.com/f17/second-story-house-cooling-question-50440/)

darktiger 08-07-2009 03:07 PM

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.

hvaclover 08-07-2009 06:50 PM

How big an area is the up stairs?

Plumber101 08-07-2009 09:18 PM

If this has an attic how much insulation is there?

darktiger 08-07-2009 11:39 PM

1100sqft more or less. The attic is pretty insulated. A good 3" of yellow fiberglass that looks blown in...

Plumber101 08-07-2009 11:43 PM

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

beenthere 08-08-2009 06:18 AM

Add radiant roof barrier, and get more insulation.

3" is a joke for an attic.

Scuba_Dave 08-08-2009 08:35 AM

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

JohnH1 08-08-2009 03:52 PM

4 Tons of cooling for 1100 sqft? Dosent that seem a little over kill guys.:eek: 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?

beenthere 08-08-2009 05:33 PM

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.

Plumber101 08-08-2009 07:21 PM

Quote:

Originally Posted by darktiger (Post 311609)
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

hvaclover 08-08-2009 08:14 PM

Quote:

Originally Posted by beenthere (Post 311963)
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:whistling2:

beenthere 08-08-2009 08:17 PM

Lol :)

JohnH1 08-08-2009 10:30 PM

Quote:

Originally Posted by beenthere (Post 311963)
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.:huh:


All times are GMT -5. The time now is 05:05 AM.


Copyright 2003-2014 Escalate Media LP. All Rights Reserved