I would like to vent my pellet stove which has a 3" flue and my gas floor furnace which has a 4" flue through my chimney which has an 8"x8" opening. Is it up to code to run two separate flue liners through a single chimney? Thank you.
rosebud said:I would like to vent my pellet stove which has a 3" flue and my gas floor furnace which has a 4" flue through my chimney which has an 8"x8" opening. Is it up to code to run two separate flue liners through a single chimney? Thank you.
DAKSY said:NO. From NFPA 211:
4.5.3 Space Surrounding Liner or Vent. The remaining space
surrounding a chimney liner, gas vent, special gas vent, or plastic
piping installed within a chimney flue shall not be used to
vent another appliance.
DAKSY said:NO. From NFPA 211:
4.5.3 Space Surrounding Liner or Vent. The remaining space
surrounding a chimney liner, gas vent, special gas vent, or plastic
piping installed within a chimney flue shall not be used to
vent another appliance.
rosebud said:Thanks for all the imput. It's an old house that I'm working on, so I'll need to have an inspector okay the gas line before a meter can be re-installed. I'll mention my idea to him when I meet him. And I'll be sure to ask about how the two liners should be capped if he does accept my proposal. (Though I would think that a similar issue regarding CO2 running down the second flue would arise with two clay liners running next to each other down a larger chimney.)
rosebud
DAKSY said:NO. From NFPA 211:
4.5.3 Space Surrounding Liner or Vent. The remaining space
surrounding a chimney liner, gas vent, special gas vent, or plastic
piping installed within a chimney flue shall not be used to
vent another appliance.
I dont think this has much bearing on the question of the OP, but my home has a Natural Gas Furnace, and a Natural Gas hot water heater, and both of them are vented into one single brick chimney. Two seperate gas appliances, venting into one chimney, and thats how the house was built. Every home I have seen that has furnace and hot water heater is always vented up into one chimney I've never seen two chimneys to vent two appliances.
I wouldnt think that using 2 seperate steel pipes in one brick liner would violate code, but I'm not an expert on this subject so it's best to ask your local code people.
We use essential cookies to make this site work, and optional cookies to enhance your experience.