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Your gas pool heater should have a BTU/hr rating for input and output printed on a placard somewhere on the heater. Look for the input rating and divide by 100,000 to get Therms/hr. Assuming your gas is being billed in dollars per Therm, just multiply that rate by your Therms/hr. to get dollars/hour. Multiply this by how many hours you run your gas heater and that's your total pool heater operating cost. Also take in account the time of year temp and wind. If your heating your pool to 78-85 degrees and your pool water is 60 degrees that would be an 18-25 degree temp rise. Your pool is exposed on all sides and this will bleed heat off quickly. It may never achieve the temp desired or not shut down and always call for heat.
110 therms.
1.034 therms
divide the number of therms by 10,000 to get mmcf
1 BTU is 0.00001 therms.
1 million BTU = 10 Therms
The word deca- means ten, so there are ten therms in a decatherm.
Therms Natural Gas to CCF Natural Gas multiply by 0.9756
Maintain the heater settings. Shutting the heater down will result in colder water temps that the heater has to overcome when it is turned on again and will cost you in the amount of BTU Therms you use. -- more expensive. I believe that it takes approx. one hr. to bring the temp up one degree. K
One million btu equals 10 therms. One hundred thousand btu equals one therm.