I recently built a wood stove for a friends garage and are having problems with smoke filling up the garage where it is not drawing properly. It was built using an old vat. It is 30" around and about 5 to 6 foot tall. It has a 6" flue going straight up out from the top then to a 45 through the wall and then back up. Is 6" to small? Any help would be appreciated, thank you.
How do I determine what size flue pipe to use on my homemade wood stove?
- Thread starter Blue55b
- Start date
-
Active since 1995, Hearth.com is THE place on the internet for free information and advice about wood stoves, pellet stoves and other energy saving equipment.
We strive to provide opinions, articles, discussions and history related to Hearth Products and in a more general sense, energy issues.
We promote the EFFICIENT, RESPONSIBLE, CLEAN and SAFE use of all fuels, whether renewable or fossil.
- Status
That's alot of firebox. I linked a calculator for bbq pits, It gives an idea of flue dimensions.
http://www.feldoncentral.com/bbqcalculator.html
http://www.feldoncentral.com/bbqcalculator.html
That is a lot of firebox for 6", most of that size are run on at least 8", sounds like your draft is suffering if you are getting smoke spillage. I would try extending your pipe another couple feet and see if that helps.
Are you using single wall then converting to Class A?
Are you using single wall then converting to Class A?
lhuffhines
Member
FWIW, on our Stoves and Furnaces we use a 6" flue on units that are 7.1 Cf fireboxes or less. More than that and we use an 8" flue. We do offer one stove that is a 3.5 with an 8" flue.
Well with that size firebox I would say you are in the 12" to 14" range for the flue. No way that 6" will work.
1/4" is a lot of steel to warm up. in my experience building bbq pits with heavy steel, it takes a lot of heat to remove moisture and heat the steel to temp. if this garage is not kept at temp and is allowed to cool completely there may be considerable condensation inside that system. can you build a small hot fire directly under flue? I assume it's a top vent without baffles. Think path of least resistance until all that steel is 200 deg or higher. I would think it would draw like a rocket stove once it's hot. maybe post some pics of the stove and flue.
Yeah but this one is 25 cubic feet.
I am curious what material the firebox is made of. What type of clearance do you have? what size space are you trying to heat?
Maybe my math is wrong but a circumference of 30" is a radius of 4.77"
4.77x4.77x72"x3.14= 2.98 cuft (5143 cu in)
That's if he truly meant "30 around" , if it's 30" diameter then he is up around 29 cu ft.
Have tried a small hot fire for warm up purposes with no luck. I will post pics tomorrow.
Yeah you need a much much larger stack on that. What material is the firebox? What clearances to combustibles do you have? and what size space is this meant to heat?
How big Is this garage your trying to heat with this monster? Basically you have 10 large wood stoves venting through 1 pipe. Any pics of this beast? He's gonna need a cord of wood every time he wants to change his oil
- Status
