CCF – Defined
A measurement of space or volume – the amount of gas contained in a space equal to one hundred cubic feet. 100 cubic feet (1 ccf) = 1 therm (approximate)
Practical info: A CCF is approximately equivalent to 1 therm. Convert CCFs to therms, to perform price comparisons.
More information: (http://www.aga.org/KC/ABOUTNATURALGAS/ADDITIONAL/Pages/HowtoMeasureNaturalGas.aspx)