Question: how much energy to heat a swimming pool?
Answer: But the U.S. Department of Energy offers some estimates. For a gas heater, the U.S. Department of Energy estimates it costs $1,448 a year to heat an outdoor pool in New York at a temperature of 78 degrees. The cost jumps to $1,904 to heat it to 80 degrees and to $2,384 for 82 degrees.