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Author Topic: Pre heated air for draft intake??  (Read 2739 times)

clydem

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Pre heated air for draft intake??
« on: January 07, 2012, 10:56:55 PM »
Would a OWB  burn more efficiently if the air let in by the draft damper was pre heated somehow?  Possibly heated by the stack gas?

Just a thought,  It comes from 33 years working in a coal fired power plant.

later
Clyde
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Re: Pre heated air for draft intake??
« Reply #1 on: January 08, 2012, 06:28:02 AM »
We do the same thing where I work heated forced draft air means we dont have to burn as much fuel as we would with Ambeint air temp. :)
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Bull

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Re: Pre heated air for draft intake??
« Reply #2 on: January 08, 2012, 06:48:52 AM »
Welcome to the site clydem
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mcarter

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Re: Pre heated air for draft intake??
« Reply #3 on: January 09, 2012, 09:15:43 AM »
This is interesting, I opened the rear door of my OWB and felt a good amount of heat in that small space escape out.  I wondered if I was losing heat out of my OWB but maybe it was designed this way to sort of preheat the draft air?

yoder or scott have any input on this?

Michael
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Scott7m

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Re: Pre heated air for draft intake??
« Reply #4 on: January 09, 2012, 05:17:47 PM »
Yea preheated air should give you more efficiency.   Garn furnaces do this but most do not. 
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