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  #1  
Old 2/2/08, 11:06 PM
Rusty Keith Rusty Keith is offline
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Default Vent Question

Gas furnice in upstairs encolsed area-fresh air vents go from enclosed area into attic area. Is this OK or should it vent to outside?
Thanks, I need this info ASAP
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  #2  
Old 2/2/08, 11:14 PM
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James Budrow James Budrow is offline
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Default Re: Vent Question

Yes thats ok.



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  #3  
Old 2/3/08, 5:36 AM
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Robert Sole Robert Sole is offline
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Default Re: Vent Question

It's OK as long as the attic has proper ventilation. It would have to be changed if the attic were insulated and the vents sealed as they are starting to do in some homes now.



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  #4  
Old 2/3/08, 5:57 AM
Larry D. Kage Larry D. Kage is offline
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Default Re: Vent Question

Combustion air...?



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Old 2/3/08, 5:59 AM
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Barry Adair Barry Adair is offline
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Default Re: Vent Question

Quote:
Originally Posted by rkeith
Gas furnice in upstairs encolsed area-fresh air vents go from enclosed area into attic area. Is this OK or should it vent to outside?
Thanks, I need this info ASAP
What kind/size of enclosed area and how many floors between it and the attic?

This all depends on the size of installed unit, vent sizing, their location should be 2 hi/lo, what other gas appliances are in the proximety...there are supposed to be a manual/instructions present for all gas fired appliances...if they aren't onsite I note as a deficiency and take down as much info (model/serial) about the unit and check it out back at the office...before sending report to client

probably not ASAP as you wanted but more info will be required before answered without this and photos



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  #6  
Old 2/3/08, 6:13 AM
Larry D. Kage Larry D. Kage is offline
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Default Re: Vent Question

Quote:
Originally Posted by lkage
Combustion air...?
The furnace we recently installed in my house enclosed area needed 1 sq. inch of combustion air (split high and low) per 4000 btu input of all gas appliances in that enclosed area if run in vertically. And double that if run in horizontally. We came direct from outside.

Edited:

I checked for my Rheem and the exact wording is:

"Each opening shall communicate directly, or by ducts, to the outdoors or spaces (crawl or attic) that communicate with the outdoors."



____________________________________________
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Lake Ann (Traverse City), Michigan 49650
231 929 3525


Professional Inspector and Infrared Thermographer serving the Traverse City, Michigan area and beyond.


ITC/FLIR CERTIFIED BUILDING SCIENCES THERMOGRAPHER

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Last edited by lkage; 2/3/08 at 6:23 AM..
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  #7  
Old 2/3/08, 6:19 AM
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David P. Valley David P. Valley is offline
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Default Re: Vent Question

Quote:
Originally Posted by rkeith
Gas furnice in upstairs encolsed area-fresh air vents go from enclosed area into attic area. Is this OK or should it vent to outside?
Thanks, I need this info ASAP
As stated already, the attic is fine for combustion air as long as it's vented properly. Gable end vents are not considered adequate with todays tighter homes.

A properly vented attic is basically....outside.
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  #8  
Old 2/3/08, 11:26 AM
Rusty Keith Rusty Keith is offline
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Default Re: Vent Question

THANKS EVERYONE! It is worth the membership dues to have access to this knowledge base.
Rusty
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