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Recommended boiler exhaust velocities.
Boiler - Exhaust Velocity
|Boiler Configuration||Recommended Boiler Exhaust Velocity|
|Ducts at minimum load ||< 4.0 ||< 13 |
|Stack at minimum load ||< 5.0 ||< 16 |
|Boiler with one-step burner (on - off) ||5.0 - 8.0 ||16 - 26 |
|Boiler with two-step burner (high - low) ||10 - 15 ||31 - 49 |
|Boiler with modulating burner ||15 - 25 ||49 - 82 |
|To keep the surface free from soot the velocity should exceed ||3.0 - 4.0 ||9.8 - 13 |
- Boiler house topics, fuels like oil, gas, coal, wood - chimneys, safety valves, tanks - combustion efficiency.
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