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Emission Estimation Calculators - Booklet 2

Gasoline Generator – Hours of Operation

Operation of a generator (reciprocating engine) with gasoline fuel combustion results in release of Criteria Air Contaminant (Part 4 Substances).

Download spreadsheet calculator: Gasoline Generator - Hours of Operation [xlsx 39 kb] (Feb 24 2016)

Suggested estimation methodology: Emissions Factor

The equation for emissions estimation is:

E = (A x B x EF)/1000


  • E = emissions [tonnes]
  • A = hours of operation [hr]
  • B = operation horsepower [hp]
  • EF = emissions factor [kilograms (kg)/hp-hr]
Part 4 Criteria Air Contaminants (CAC) Releases
Substance NameChemical Abstracts Service Registry Number (CAS RN)Footnote1Emission Factor (EF)Footnote2EF Units
Carbon Monoxide (CO)630-08-03.157E-03Footnote**kg/hp - hour
Sulphur Dioxide (SO2)7446-09-52.681E-04kg/hp - hour
Oxides of Nitrogen (NOx), expressed as nitrogen dioxide (NO2)11104-93-14.99E-03kg/hp - hour
Total Particulate Matter (TPM)Footnote*3.27E-04kg/hp - hour
Particulate Matter less than or equal to 10 micrometers (µm) (PM10)Footnote*3.27E-04kg/hp - hour
Particulate Matter less than or equal to 2.5 µm (PM2.5)Footnote*3.27E-04kg/hp - hour

Note on Emissions Factors

The default emission factors are used in the table above, however if you have a site specific emission factor you would prefer to use you may enter it in the emission factor column. If you choose to insert your own emission factor ensure that the units have been converted accordingly. 

The emission factors used in this spreadsheet are based on uncontrolled emissions. If you are using an emission control device you will have to adjust the emissions calculated by this spreadsheet according to the following formula:

Controlled Emissions = Uncontrolled emission x ((100 - control efficiency)/100)

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