In most cases a step up is also fine.
What size flue pipe for wood stove.
Once these clearances are met you must convert your stove pipe to class a chimney pipe for proper venting of your stove.
12 4 4 1 the cross sectional area of the flue shall not be less than the cross sectional area of the appliance flue collar unless specified by the appliance manufacturer.
Double wall stove pipe on the other hand requires only 8 inches of clearance from the ceiling and 6 inches from a wall.
Supervent 24 in l x 6 in dia black insulated steel stove pipe.
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The building regulations require that the minimum flue size for stoves are as follows.
So the regs recommend a minimum flue size of 150mm for any stove on which wood could be burnt unless it is defra exempt.
Should the size of the flue be reduced at the back of the stove or continue to use the 8 inch stove pipe and reduce the flue to 6 inch at the thimble that goes into the chimney any advice will be appreciated.
However increasing the flue to a size larger than the stove s collar or flue flange is.
That said if the stove you have chosen is defra exempt and has a 125mm outlet then a 125mm diameter flue may be used.
As a general rule the diameter of the chimney should match the flue collar on your wood stove.
The original flue size was 8 inch.
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But keep in mind that most likely you need to obtain a building permit and inspections for installing any new heater anywhere don t view that as a stumbling block but.
Will it operate properly on the 6 inch flue.
Up to 20kw burning smokeless fuel minimum 125mm diameter.
Use black painted flue pipes.
Flue pipe joints should overlap 30 mm 1 1 4 in each joint in the assembly must be fastened with at least three screws.
It s not just stove pipe size you need to consider but proper fire rating of the flue or chimney materials clearances from combustibles cleanout access and code.
Imperial 24 in l x 8 in dia black steel stove pipe.
The way wood stoves and fireplaces work a correct match on fitting the flue size to the appliance is a must.
Galvanized flue pipes must not be used because the coatings vaporize at high temperatures and release dangerous gases.
That s worth remembering because many non defra exempt stoves come with a 125mm flue outlet which then requires upsizing to 150mm.
If the stove is defra exempt and has a 125mm outlet then a 125mm diameter flue may be used.
Per nfpa 211 the industry standard for residential style wood stoves.
Imperial 6 in x 6 in 90 degree black steel stove pipe elbow.
6 7 and 8 inch diameter flue pipes must be at least 24 gauge in thickness.
Up to 30kw burning any fuel minimum 150mm diameter.
For example a single wall stove pipe requires 18 inches of clearance from ceilings or walls.