How do I compare a gas heater to a solar pool heater?
First check the operating costs. Will you really be willing to pay the gas bill, or will you shut off the pool heater when you need it most? Second, ask about annual maintenance costs. Solar has none. Also, determine the life of the system. Solar pool heating systems can last 15-20 years. Lastly, what are you really trying to accomplish with a pool heater? If you want your pool to be a comfortable swimming temperature all season long, then choose solar.