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Inspecting HVAC Systems Topics include heating, venting, and air conditioning inspections.

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  #1  
Old 6/18/07, 5:58 PM
Vincent Wood Vincent Wood is offline
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Location: Flint, MI
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Default furnace return air duct

hi. i found a furnace in a ranch home full basement. The only return air
duct was running 3 ft off of the furnace with a filter sitting on top of
the open duct work. this is a up flow forced air furnace. there were no
return air ducts any were else. I said that a heating and cooling co.
should advise if this is proper. any comment?
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  #2  
Old 6/18/07, 7:02 PM
Jeffrey R. Pope, CMI's Avatar
Jeffrey R. Pope, CMI Jeffrey R. Pope, CMI is offline
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Default Re: furnace return air duct

Return-air cannot be taken from the same room as a gas-fired furnace. This is a serious safety hazard that needs to be corrected.



IF YOUR INSPECTOR IS NOT USING THERMAL IMAGING, YOU'RE NOT GETTING THE WHOLE PICTURE
Jeff Pope
JPI Home Inspection Service
Santa Clarita CA
(661) 212-0738
Santa Clarita Home Inspection
http://www.MyInspector.net


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  #3  
Old 6/18/07, 7:12 PM
Vincent Wood Vincent Wood is offline
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Default Re: furnace return air duct

Thanks I knew that return air was not sapose to be drawn from a basement
are. also that system must have very poor circulation. also a pressure
issue on the main level.
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  #4  
Old 6/18/07, 7:15 PM
Henry Valenzano, CMI's Avatar
Henry Valenzano, CMI Henry Valenzano, CMI is offline
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Default Re: furnace return air duct

Quote:
Originally Posted by vwood
hi. i found a furnace in a ranch home full basement. The only return air
duct was running 3 ft off of the furnace with a filter sitting on top of
the open duct work. this is a up flow forced air furnace. there were no
return air ducts any were else. I said that a heating and cooling co.
should advise if this is proper. any comment?
Colorado requires the return air to be at least 10 ft away from the unite in a open basement. If the furnace is in its own room you can not have a return in it.



Henry Valenzano CMI (Hank)
Double Check Home Inspection LLC.
www.DCHI.com Hank@DCHI.com 719-635-6425
Colorado Arms Repair : Gunsmith
www.ArmsRepair.com Henry@ArmsRepair.com
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  #5  
Old 6/19/07, 11:27 AM
David A. Andersen's Avatar
David A. Andersen David A. Andersen is offline
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Default Re: furnace return air duct

Quote:
the same room as a gas-fired furnace
Isn't that 10 feet from or from a room with insufficent volume for combustion air?
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  #6  
Old 6/19/07, 1:18 PM
Henry Valenzano, CMI's Avatar
Henry Valenzano, CMI Henry Valenzano, CMI is offline
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Default Re: furnace return air duct

Quote:
Originally Posted by dandersen
Isn't that 10 feet from or from a room with insufficent volume for combustion air?
There should never be insufficient combustion air. That would be a completely different problem. Return should never be within 10 ft of the unite if it is in a Open basement. and should never be in a enclosed furnace room even if it has enough combustion air. Furnaces with a sealed combustion chamber has another set of rules. General rule of thumb if it looks out of the ordinary or just not refer it to a licensed professional.



Henry Valenzano CMI (Hank)
Double Check Home Inspection LLC.
www.DCHI.com Hank@DCHI.com 719-635-6425
Colorado Arms Repair : Gunsmith
www.ArmsRepair.com Henry@ArmsRepair.com
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