In most cases a step up is also fine.
Chimney vent pipe size.
A 6 inch stove requires a 6 inch flue.
Of duraplus chimney pipe sold separately and features the necessary items for a through the wall vertical chimney installation including a chimney pipe with two insulating layers consisting of a ceramic blanket plus air space.
In most cases you ll need a combination of different length pipes for proper venting.
After that add any height needed above the chimney chase for a storm collar and chimney cap.
Depending on the manufacturer you will need to add the item to your cart and perhaps begin the checkout process.
The venting capacity of a rectangular or square masonry flue if translated directly into actual or measured square inches of cross section is less than a round chimney flue of the same square inches of venting capacity.
To see the price.
Tsc carries stove chimney pipes.
This through the wall chimney stove vent kit supports up to 40 ft.
The rule of thumb for sizing a chimney liner is that you never want it to be smaller than the appliance exhaust hole and you don t want the liner to be three times the area of the exhaust hole of the appliance.
While some manufacturers offer adjustable lengths others do not.
Type b hart cooley pipe sizes 3 through 24inches in diameter require 1 inch of airspace clearance throughout the entire length.
So as your chimney is in between those two and even the smaller internal size chimney can vent more btuh than you are connecting the chimney itself meets the standards as i read them.
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Pipe sizes 26 30 in diameter require 2 of airspace clearance throughout the entire length.
30 foot masonry chimney in this temperature range can vent 485 000 input btuh.
Most wood burning stoves are top vent models meaning the flue collar will be on top of the unit.
For example you could vent a 6 inch stove into an insulated chimney that is 8 inches in diameter.
As a general rule the diameter of the chimney should match the flue collar on your wood stove.
For example an 8 x 8 square nominal clay chimney flue tile liner has inside dimensions of 6 3 4 x 6 3 4.