Emissions calculator for natural-gas-fired boilers. Enter the heat input, amount of fuel burned per year, then select the units and finally click on "Calculate Emissions." The values will appear below.

Heat input:	< 100 >= 100 million BTU/hr
Amount of fuel burned:		cubic feet million cubic feet therms

Emissions (tons/year)

CO
CO2
METHANE
N2O
NH3
NOX
PART
PM10
PM2.5
SO2
VOM