Boiler Combustion Calculator
Boiler Combustion Calculator: Total Air Supply for Complete Combustion
A boiler burner needs more air than the bare stoichiometric requirement to guarantee complete combustion in real-world conditions, where fuel and air never mix perfectly. This calculator computes the actual combustion air supply, factoring in your chosen excess air margin.
The Formula
Total Combustion Air = Fuel Flow × Stoichiometric Air Ratio × (1 + Excess Air% / 100)
Worked Example
A burner consumes fuel at 100 units/hr, the stoichiometric air ratio is 17.2, and the burner runs with 15% excess air.
Total Air = 100 × 17.2 × (1 + 0.15) = 1,978 units/hr
How to Use This Calculator
- Enter the fuel flow rate in any consistent mass or volume unit per time.
- Enter the stoichiometric air-to-fuel ratio for your fuel type.
- Enter the excess air percentage your burner is set to run at.
- Click Calculate to get the total combustion air required.
Related Calculations
Cross-check with the Stoichiometric Air Requirement Calculator and Excess Air Calculator.