Chimneys and Fireplace Sizing
Chimneys and fireplaces for stoves burning wood or coal as fuel.
Chimneys can be separated in two main categories:
Prefab or Metal Chimneys
Prefab or metal chimneys, class A and double or triple walls are usually found in three diameters. Each diameter has a specific usable area, which is also called it's cross section.
The capacity of a chimney to remove smoke and/or energy (BTU's) from an appliance is directly related to the cross section area.
|Chimney Size||Common Venting Uses|
|6||28.3||Stoves, Central Heaters|
|7||38.5||Stoves, Central Heaters|
|8||50.3||Stoves, Small Fireplaces, Central Heaters|
|10||78.6||Stoves, Fireplaces, Central Heaters|
|12||113||Fireplaces, Central Heaters|
|Flue Size||Common Venting Uses|
|7 1/2 X 7 1/2||31||Stoves, Central Heaters|
|8 1/2 x 8 1/2||41||Stoves, Central Heaters|
|8 1/2 X 13||70||Stoves, Fireplaces, Central Heaters|
|13 X 13||99||Fireplaces|
|13 X 18||156||Fireplaces|
Boiler house topics, fuels like oil, gas, coal, wood - chimneys, safety valves, tanks - combustion efficiency.
Heating systems - capacity and design of boilers, pipelines, heat exchangers, expansion systems and more.
Calculate chimney draft and required chimney area - online calculator.
Chimney's Explosion Doors
Recommended size of explosion doors or draught stabilizers in oil fired installations.
Natural Draft - Air Flow Volume and Velocity
Air flow - volume and velocity - due to stack or flue effect caused by indoor hot and outdoor cold temperature difference.