- Apr 24, 2013
- 90
my nat gas cost me $5.134 per mcf to break that down into thermal units divide by 10.23 that gives me a price of $.50 a therm. so to heat my pool 13,500 gallons 10 degrees with 3.5mph wind and a 250k btu heater at 80% efficiancy should run me aprox. $6.25 is this right