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Posted by StarkShark on October 30, 2007, 9:34 am
> StarkShark wrote:
>> The heating and cooling in my house is functioning well. One room
>> upstairs is a little cool when the heat is on, a little warm when the
>> AC is on, but that's about it. It's a forced air system that was
>> installed to replace a gravity feed coal furnace.
>>
>> The system has two air returns. One in the living room, about 12
>> inches square, and a giant one in the kitchen, 24 X 30, or 720 square
>> inches. The duct in the kitchen is formed from two 10 inch deep
>> joists. As I see it, the joists form a return duct about 28 X 10, or
>> 280 square inches.
>>
>> With all else remaining the same, can I reduce the opening in the
>> floor to about 10 x 30, or 300 square inches without harming the
>> intake volume of the duct?
>>
>> To me, it looks like breathing through a straw. You can put a funnel
>> on the straw, but it won't make you get any more air through the
>> straw. So does the opening in the floor need to be so huge?
>>
>> I suspect it's so large only because the duct was that way when the
>> furnace was installed.
>> Thanks
>
> Just like writing code. Call your local HVAC guy and see what he
> thinks you should do. It's simple. A lot simpler than finding
> someone to write computer C++ Code.
>
I was trying to avoid paying a bunch of money for a 5 minute visit to get
the answer to a question I /thought/ was simple. I also thought I would
be asking HVAC guys in this group what they think I should do. The
answer is obvious: hire them.
I think I'll try that attitude in comp.lang hierarchy and see how far it
gets me. Or maybe in a computer repair forum on the web: "You want to
learn how to fix your hard drive? Call a pro and give up."
Thanks for the civil answer, anyway. I'll probably do that.
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