tankless venting


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Old 11-24-18, 04:30 PM
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tankless venting

I was considering one of the 500$
on demand propane hot water units. It would need to be vented thru a 14 inch thick straw bale insulated wall.
No framing inside this wall. Its timber framed.
So I would need to fit a one pipe,2 passageway, intake and exhaust thru this wall.
If the outer pipe cold air passage was insulated with 1 inch of ceramic insulation on the outside would the temps be under say 120F on the outside wall of the outside passage? I know the inner passage venting would be hot...what do you think?
 
 

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