Answer:
Not sure what exactly it is you`re looking for but here goes. If you are talking about a particular fuel: Natural gas contains = 1000 btu per cubic foot. Propane contains = 2500 btu per cubic foot. If you are talking about air conditioning it takes appx 400 cfm of air flow per ton of air conditioning to support it`s proper operation, and a ton of air conditioning = 12,000 btu. I hope one of these answers your question.