[Greenbuilding] Source of Combustion Air

[Clarke Olsen]

    All combustion devices need air, wether a fireplace, an ancient 
boiler, or
    a high efficiency heater; you should pipe it in to the unit one way 
or another.
    Clarke Olsen

On Apr 12, 2007, at 10:04 AM, Drew A. Gillett, P.E. wrote:
> and why would you have anything else?
> ----- Original Message -----
> From: "Steve Houlihan" <sho11 at comcast.net>
> To: "'Greenbuilder list'" <greenbuilding at listserv.repp.org>
> Sent: Thursday, April 12, 2007 12:01 AM
> Subject: [Greenbuilding] Source of Combustion Air
>
>
>> With all this talk about whether to include a basement in the building
>> envelope I wonder where a furnace in the enclosed basement gets 
>> combustion
>> air.  If it takes it from the conditioned space and the furnace flue
>> exhausts to the outside then it creates a negative pressure in the 
>> house.
>> It could get it from the outside only if it is a high efficiency 
>> furnace.
>>
>> Steve
>>
>>