Hello everyone, great forum. We are getting an inground pool installed in 2 weeks. It is 36X18 rectangle. We went with the SWG and an auto pool cover. We live in Southern Indiana. We plan on using the Pool from May-October. The heater will give us an extra 2-4 weeks of swimming. I have learned that an auto cover will be very useful with a heater. Up front, the gas heater will be less than the electric heater. Since we will only use it in May and October, and natural gas prices extremely high, I am leaning towards gas. But over time will an electric heater be much cheaper than a gas heater?