[Greenbuilding] masonry stove flue - run inside or take outside?

[Norbert Senf]

At 04:12 PM 2/9/2009 -0500, RONALD CASCIO wrote:
>Not only would they loose allot of heat to the 
>outdoors, more of the flue gasses would condense 
>at the lower temperatures and it would not draw as well.
>
>Keep it inside, if at all possible, for all kinds of reasons

What Ron said.

However, the only condensible in the flue gas is 
water, so that's what would condense. You need 
tar in the flue gas before you can get creosote, no matter how
cold the gas. You get creosote from smoldering 
combustion (no flame) and soot from flaming 
combustion (heh, heh, aka carbon black, or lamp black).
A masonry heater is never, ever, put into smolder 
mode unless you are operating it way off the scale.

If you absolutely have to have an outside chimney 
(there better be a REALLY good reason), under no 
circumstances make it masonry. It has to
be insulated low mass stainless. You will have 
issues with cold starts, that you should have a plan for dealing with.

Norbert


-------------------------------------------
Norbert Senf---------- mheat(at)heatkit.com
Masonry Stove Builders
25 Brouse Rd.
RR 5, Shawville------- www.heatkit.com
Québec J0X 2Y0-------- fax:-----819.647.6082
---------------------- voice:---819.647.5092