venting through a floor and attic.

I need to know what the stand off is i.e distance from double insulated pipe required around a pipe chase and I guess just the distance need to pass through floors and ceilings? I am in Massachusetts and I'm reading the code book but it is rather difficult to understand.

begreen said:

Typically it's 2".

By double-wall insulated, you mean the shiny stainless pipe like DuraTech, right?

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Yes, and I need to pass through the floor and create a chase in order to vent through the roof properly. I also need to know once I'm in the attic space is there a space requirement from the floor to the roof.

webbie said:

This is specified in the instructions for the particular insulated pipe and is usually 2".
MA. does not have it's own codes in this regard....you have to install as per the manual.

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Okay would that be the pipe manufacturer or the stove? and the two inches is to a standard wall space i.e wood framing and sheet rock or is that 2' to a non-combustible shielding.

webbie said:

The pipe manual, not the stove one, is what you should use. 2" is fairly standard, although some may be less. If I were doing a chase, I'd enlarge it slightly (maybe 2 1/2") to allow for tolerances in the pipe and the fittings. Some crazy inspector could call you out for being 1 7/8" in some spots!

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Thank you I appreciate that.

webbie said:

The pipe manual, not the stove one, is what you should use. 2" is fairly standard, although some may be less. If I were doing a chase, I'd enlarge it slightly (maybe 2 1/2") to allow for tolerances in the pipe and the fittings. Some crazy inspector could call you out for being 1 7/8" in some spots!

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Is there any way to get away from having to be 10' away with the vent pipe, it really limit me to where I can install the stove. s the a shield or something? Since my understanding is you mu be 10 feet way horizontally to the nearest structure and then two fee above that. This seems really over kill to me but hey what do I know. I want to do it by code for all the obvious reasons but I can see why people cut corners the restrictions really bind you in some cases.