Chief Dick Posted October 28, 2007 Share Posted October 28, 2007 Just got my hands on a nice wood burning stove for my detached garage. So now I need to flue it. I know I need to go triple wall through the roof. The stove has an 8" output for vent pipe. Was wondering if it's ok to reduce it to 6" pipe and go triple wall all the way up. The cost difference between 8" and 6" pipe is pretty significant. Anyone with experience in this area? I thought about going triple wall through the roof and double wall from the stove to the roof piece. Quote Link to comment Share on other sites More sharing options...
catdog Posted October 29, 2007 Share Posted October 29, 2007 Bump I'm in a very similar situation Quote Link to comment Share on other sites More sharing options...
gardenthug Posted October 29, 2007 Share Posted October 29, 2007 Just got my hands on a nice wood burning stove for my detached garage. So now I need to flue it. I know I need to go triple wall through the roof. The stove has an 8" output for vent pipe. Was wondering if it's ok to reduce it to 6" pipe and go triple wall all the way up. The cost difference between 8" and 6" pipe is pretty significant. Anyone with experience in this area? I thought about going triple wall through the roof and double wall from the stove to the roof piece. I'm in nearing the end of a complete restoration for a 1930's bungalow. I have encountered numerous problems. I found that Yahoo questions was an awesome asset. Just go to the home repair section and ask the same question. Quote Link to comment Share on other sites More sharing options...
Footballjoe Posted October 29, 2007 Share Posted October 29, 2007 I would call your local city inspector. You do not need to give your name or anything, just find out the local codes. On someting like this you want to meet code requirement in case of fire so that your insurance will pay. Quote Link to comment Share on other sites More sharing options...
Yukon Cornelius Posted October 29, 2007 Share Posted October 29, 2007 I would call your local city inspector. You do not need to give your name or anything, just find out the local codes. On someting like this you want to meet code requirement in case of fire so that your insurance will pay. wurd Quote Link to comment Share on other sites More sharing options...
Tford Posted October 29, 2007 Share Posted October 29, 2007 (edited) Maybe, maybe not depends on the size of the stove I suppose. Your flue is designed to minimze backpressure on the stove exhaust. While 6" pipe and 8" pipe seem close enough, the throughput area is almost double for 8" pipe (~50.2 square inches) than that of 6" pipe (~28.3 square inches). Exhaust backpressure is really no different for an engine than it is for a fireplace. The more backpressure you have on the exhaust, the less efficient your unit is. Will 6" work? Probably. Is it the best thing for the stove? Probably not. Do you have a blower? If so, then you will probably be fine. That being said, your local building code will likely have a standard that you must adhere to, first and foremost. Your fire chief or town planner should have the regulations for you. If you don't get any good info from them (or they tell you that it varies with the stove), I'd call the stove manufacturer and ask to speak with the engineer. Edit: In Canada, regulations state that the chimney flue diameter should equal the stove outlet. Not sure how it is where you are. Edited October 29, 2007 by Tford Quote Link to comment Share on other sites More sharing options...
Brewer Posted October 29, 2007 Share Posted October 29, 2007 I wouldn't neck it down from 8" to 6". You need a good draft to keep things working properly. Also, I'm sure that the NYS and PA building codes prohibit you from dropping down in size from the stove outlet to the flue, so that is probably a fairly common code requirement. Put a wood stove in my basement last year and had to go with the 8". The building inspector mentioned that it had to be set a cerain height above the floor in unfinished basements and garages. Best to check with your code officials. Quote Link to comment Share on other sites More sharing options...
Yukon Cornelius Posted October 30, 2007 Share Posted October 30, 2007 Best to check with your code officials. wurd they be turds Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.