Unless the combustion air is ducted. Given this is an attic in a residence, which is rarely know for excess air flow, how do they provide air in the first place?


At 12:13 PM 8/20/2010, you wrote:
Providing an enclosure could get a bit more complicated due to the need for
combustion air.  If the combustion air happens to be -20F, will the
enclosure really provide freeze protection?

Ed Kramer
Littleton, CO


> An enclosure may be the only alternative, not
> knowing the dimension of the units involved. It
> would just need to be an insulated box, since we
> are enclosing a furnace and residual heat would probably keep the space
> warm.

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Fire Protection Design/Consulting
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