Chimney Flue Dimensions

100 mm bearing length brick.

Chimney flue dimensions.

An unlined chimney s minimum wall thickness is 14 in. 350 mm consisting of the same elements. Check with your local code enforcement officer or fire dept for proper installation. 50 mm of noncombustible material brick and 3 4 in.

250 mm consisting of. Just muliplying these dimensions together 6 75 x 6 75 45 56 sq in. A 6 inch stove requires a 6 inch flue. Typical standards require a cross section area of the fireplace flue or chimney vent to be equal to 1 10 of the area of the fireplace opening itself for a conventional wood burning installation and without considering the effects of a glass fire door.

The outer wall of your pipe also needs to be covered by your cap but it doesn t matter if your cap extends beyond the edges of your pipe. A q v 3 where. A cross sectional area of chimney m 2 q volume of flue gases at chimney temperature m 3 s v velocity m s in general 1 kw boiler heat requires 1100 mm 2 of chimney area. A pipe with a seven inch inner diameter for example requires a seven inch chimney cap.

Click to enlarge any image. Thickness of a lined chimney to be used as a structural component is 10 in. They help protect the chimney walls from heat and minimize condensation. In most cases a step up is also fine.

Terra cotta flue intent is to contain the combustion products and direct them to the outside atmosphere. 100 mm chimney wall brick 2 2 in. As a general rule the diameter of the chimney should match the flue collar on your wood stove. Chimney vent capacity chart btu h and kw pdf.

Dimensions for square rectangular and round clay flue liner. For example an 8 x 8 square nominal clay chimney flue tile liner has inside dimensions of 6 3 4 x 6 3 4. The ideal flue size is typically determined by the exhaust outlet of the stove or appliance. Socket type joints and self aligning joints are available in round flue liners.

The diameter of the chimney cap you choose needs to be the same as your pipe s inner diameter. For example you could vent a 6 inch stove into an insulated chimney that is 8 inches in diameter. Chimney vent capacity chart btu h and kw. Required chimney area can be calculated as.

Superior clay manufactures a complete line of vitrified clay flue liners from 3 to 36 diameters in round flue liners and from 4 x8 to 24 x24 in square and rectangular flue liners.