#460737 Pentair MasterTemp 400,000 BTU, High Performance Pool and Spa Heater, Propane Pentair MasterTemp 400 heaters offer all the efficiency convenience and reliability features you want in a pool heater plus a lot more. An Eco Select Choice: The Pentair MasterTemp 400 LP Heater offers best-in-class energy efficiency. Plus they are certified for low NOx emissions making them eco-friendly favorites. The MasterTemp 400 LP heats up fast so you experience no long waits before enjoying your pool or spa and it has "Best-in-class energy efficiency". The heater also has a compact design and super-quiet operation and doesn't intrude on your poolside leisure time. As easy to use as your home heating system. Features: • Very compact design for such a high performance heater allows for smaller overall equipment pads that won't intrude on your poolscape. • A fully pre-mixed system with a highly efficient air and gas mixture lets MasterTemp heat up fast. The MasterTemp 400 controls are as easy to operate as your home heating system. • User-friendly indicator lights make system operation and monitoring a snap. • The easy-to-view rotating digital display places controls front and center no matter how MasterTemp is positioned on your equipment pad. • The MasterTemp 400 is engineered for super-quiet operation and won't intrude on your poolside leisure time. • A tough rustproof composite exterior handles the heat and weathers the elements. • Eco-friendly MasterTemp® is certified for low NOx emission and outperforms industry standards. • Safe operation is assured through a series of features including; a water pressure switch that senses the pump is running to prevent overheating; high limit switches assure the heater turns off if water temperature exceeds factory set limits. • Manual gas shut-off when service is required. • Stack flue sensor 460737 Pentair MasterTemp, 400,000 BTU High Performance Heater, Propane https://www.pentair.com/en-us/pool-spa/products/heaters-heat-pumps/mastertemp-high-performance-heater.html