The Jandy JXi Gas Pool Heater 200,000 BTU model is a perfect option for anyone who is looking to efficiently heat their pool and save a little money on overall operating costs at the same time. It features an efficiency rating of 84%, which means that a significant amount of the energy that is being used in operation is actually being turned into heat. With a minimum GPM (gallons per minute) of 30 and a maximum GPM of 100, it can be used to heat a pool surface area of up to 300 square feet. It is compatible with a wide range of the various automation options on the market and will require professional installation in order to be properly set up. It also has a copper exchanger and high-temp poly headers.