This is the best option for businesses that know their exact natural gas use. Because this option uses actual natural gas usage figures, it allows us to calculate the exact emissions associated with your usage. Your natural gas provider (utility) should be able to provide your total annual natural gas use either in cubic feet or in therms. This information can also be found on your monthly natural gas bill.
Therms to cubic feet converter: 1 therm is approximately equal to 100 cubic feet (CCF)
1 CCF = 100 cubic feet = 100 * 1031 BTU = 103,100 BTU
1 CCF = 103,100 BTU = 1.031 therm
If you do not know your exact natural gas usage, use one of the other options below.
This option provides a building-type specific estimation of your natural gas use (and associated emissions). It is based on the national average natural gas use per square foot for each building type listed. While not an exact measurement, this is a great option for businesses that do not know their exact natural gas usage and whose building type is listed in our drop-down menu. If you do not see your exact building type listed, you can either select the closest possible building type, or use the "calculate by square footage" option below—just be aware that this calculation is an estimate only.
Unfortunately, national average natural gas figures for all commercial building types are not yet available as they are for electricity usage.
SOURCE: CBECS 2006,
http://www.eia.doe.gov/emeu/cbecs/cbecs2003/detailed_tables_2003/2003set9/2003html/c3.html