general guidelines for ducts and registers in finishing basement


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Old 04-07-06, 10:59 AM
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Question general guidelines for ducts and registers in finishing basement

What are some general rules-of-thumb out there for running new ducts and placing registers for finishing a basement?

I will be adding about 700 sq.ft. Mostly one big room divided by the staircase and a full bath.

For instance, I've heard that you should try to place registers near windows. Is that true? If so, why is that the case?

Thanks,
V
 
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Old 04-07-06, 03:21 PM
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Design of ductwork for FA heating or cooling systems is quite involved to to it correctly. It is not that a layperson can't do it but it will be tedious and time consuming without the computer programs to help.

You could try to obtain an ASHRAE (American Society of Heating, Refrigeration and Air conditioning Engineers) manual and reading the chapters pertaining to FA duct systems. You don't need the latest edition so you might try your public library or a used book store.

Heat outlet registers are usually placed under windows because windows are usually the area of greatest heat loss in a room. The concept is known as "Perimeter Heating" and it involves adding the heat at the point of greatest loss.
 
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Old 04-10-06, 04:17 AM
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Originally Posted by virgil
What are some general rules-of-thumb out there for running new ducts and placing registers for finishing a basement?
Supply register need to be located on the ceiling near the exterior walls. Try to limit the number of corners in the duct.

Cold air returns must be located near the floor and preferably opposite the supplies to provide the maximum air circulation.
 
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Old 04-12-06, 03:38 PM
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