Boiler Running Cost Calculator
Estimate boiler fuel input, billing-unit consumption, monthly running cost and annualized cost from heating load, load factor, efficiency and runtime.
Default project preview
$144.00
Average delivered heat rate
36,000 BTU/h
Average fuel-input rate
40,000 BTU/h
Monthly input energy
2,813 kWh equivalent
Variable fuel cost
$144.00
Calculator
Build the material order
Your order will appear here
Enter the project details and calculate a rounded material estimate.
Methodology
Transparent calculation
BuildMeter converts every input to a consistent internal unit, applies the selected allowance, and rounds products up to whole purchasable units.
Average delivered rate = rated output × load factor. Fuel-input rate = delivered rate ÷ efficiency. Monthly billing units = input rate × runtime ÷ energy per billing unit.
FAQ
Boiler Running Cost Calculator questions
What should I use for load factor?+
It is the average fraction of full heat output while the boiler is scheduled to operate. Actual load changes with weather and controls.
Why enter energy per billing unit?+
Fuel bills can use therms, kWh, cubic volume or another unit. Enter the energy represented by one priced unit.
Does this include domestic hot water?+
Only when its heat load and runtime are included in the entered assumptions.