4 vertical bars shall be provided for each additional flue incorporated into the chimney or for each additional 40 inches 1016 mm in width or fraction thereof.
Chimney liners for open fireplaces.
Flex all stainless steel chimney liner 6 in.
The forever cap flex all single ply 4 in.
The ideal flue size is typically determined by the exhaust outlet of the stove or appliance.
Standard for chimneys fireplaces vents and solid fuel burning appliances nfpa 211 reduces fire hazards by ensuring the safe removal of flue gases the proper installation of solid fuel burning appliances and the correct construction and installation of chimneys fireplaces and venting systems.
Chimney liners for open fires.
Open fires with larger fireplace openings usually freestanding grates will need larger flue sizes calculated alongside the height of the chimney and required ventilation.
Understanding chimney components image credit.
Grout shall be prevented from bonding with the flue liner so that the flue liner is free to move with thermal expansion.
Most british open fires were and still are designed to burn coal at up to 25 efficiency.
Smooth wall fireplace stainless steel chimney liner kit model sw620sskf 423 16 423 16.
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A flue lining usually made of refractory concrete or impervious clay.
Stainless steel and is backed by a lifetime warranty.
Chim cap corp 6 in.
Open wood burning and coal fires require a class 1 flue liner with a minimum diameter of 200mm.
X flex all stainless steel chimney liner 6 in.
It is flexible for relining masonry chimneys.
C flue connector connects the fireplace to the flue.
Stainless steel pipe chimney liner kit model faclk425.
B flue must be high enough for sufficient draught around 4 5m in most cases.
For chimneys more than 40 inches 1016 mm wide two additional no.
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.
The tile liners used in most masonry fireplaces are fine as long as the fireplace is properly maintained and not exposed to chimney fires.
One good chimney fire will usually crack these tiles rendering them ineffective.
The general rule of thumb is that a masonry fireplace should be swept before 1 8 of soot accumulates.
A liner going to an insert or stove in the fireplace will be measured from the top of the chimney to the top of the insert or stove or the center of the hole on the back of the stove.