We utilized Heliocol Solar Systems for our swimming pool heater. We couldn’t be happier. We weighted out the options of buying a gas heater for the pool and glad we didn’t go that route. My neighbors have a gas heater and told me that they spend about $ 200 for a weekend of 80 degree water(March, April, October & November). The outside air temps are too cold to swim in Dec, Jan, Feb for either a solar system or a gas/propane heater. Within 36 hours after the installation we had the water temperature increase by about 15 degrees. And that was in the first week in April. We set the solar heater for 80 – 85 degrees and the system shuts off automatically once our pool reaches the set temperature. The system is very low maintenance. Our salesman, Rusty Jones, was great. Explained everything in detail to include features, options, financing and rebates. We received several follow up calls to ensure our satisfaction as well as a follow up visit one week after the install to inspect the system. We will be going with Heliocol for a misting system next for the back porch.