= 107 Pa
The velocity of air and flue gas in a smaller furnace should not exceed 2 m/s . Design velocities of larger furnaces should not exceed 10 m/s .
Required chimney area can be calculated as
A = Q / v (3)
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.
Boiler house topics, fuels like oil, gas, coal, wood - chimneys, safety valves, tanks - combustion efficiency.
Recommended size of explosion doors or draught stabilizers in oil fired installations.
The size of chimney vs. boiler's heat load.
Chimneys and single wall vents roof termination.
Chimneys and fireplaces for stoves burning wood or coal as fuel.
Air flow - volume and velocity - due to stack or flue effect caused by indoor hot and outdoor cold temperature difference.
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