My husband and I are having a pool constructed for us and the job foreman and gave us a lot to think about. The sales man said that a 11KW heater on the spa would work fine, but the job foreman said that it will take it all day to heat up and expensive to run the electric heater.

Any ideas on what would work best? I know ideally we would like a gas heater but too expensive. We live in SW FLorida so it doesn't get that cold here but still want to heat the spa after a long day at work.

Thanks for all the help!