Pentair MasterTemp 200,000 BTU Propane Swimming Pool Heater - 460731 Pentair Model: 460731 Rotating digital display allows easy access to temperature settings with 5 LED system indicator lights Hot surface ignition means no pilot light with easy push-button, digital controls and cupro-nickel heat exchanger Fully pre-mixed air and gas mixture system allows MasterTemp to heat up fast Eco-friendly heater is certified for low NOx emissions