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natural gas boiler ash percentage

Boiler/Burner Combustion Air Supply Requirements and ...

As a "rule of thumb" 1 ft 3 of natural gas theoretically requires 10 ft 3 of air for complete combustion at 60°F and 14.7 psi under perfect conditions. Of course this never happens therefore burner combustion air fans may be sized for 25% excess air in which case the fan would deliver 12.5 ft 3 of air per 1 ft 3 of natural gas ...

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