Gas Vent
Gas Vent

Adding a natural gas vent to a wood burning chimney?
is it possible to run a natural gas vent up a chimney using something like b vent or 4 inch pipe? What i have is a wood stove using my chimney that measures somthing like 8"x12", or close to that. I want to run a 4 inch pipe up the chimney for my gas furnace to keep the flu separate. Is this ok and is it possible? Would it be better to run it somewhere else?
I still want to use the wood stove and the furnace
It’s correct that this won’t meet code. With that being said it won’t fly for 2 reasons, the fact that you would be creating much more surface area within the chimney area that creosote could adhere to, and the heat would be more that the b-vent could handle. The alternative would be to have both separated within the chimney provided it’s large enough. B-vent would fly for the furnace, but you would need to check with the local authority having jurisdiction regarding the venting material for the wood stove. There is a multitude of venting material out there, so again a local contractor would know the code for your area. A local HVAC contractor would also be familiar with materials accepted for use in your area.
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