Pentair MasterTemp Heater High Performance Eco-Friendly 200,000 BTU Propane Gas Low NOx P/N: 460731 MasterTemp®s offer all the efficiency, convenience and reliability features you want in a pool heater, plus a lot more. As easy to use as your home heating system, plus, user-friendly indicator lights make system operation and monitoring a snap. The compact design and super quiet operation won't intrude on your poolside leisure time. Heavy-duty (HD) unit with cupro-nickel exchanger stands up to the harshest of applications, like low pH, high flow or heavy use. Features *Heats up fast so no long waits before enjoying your pool or spa *Best-in-class energy efficiency* *Manual gas shut-off when service is required *Eco-friendly MasterTemp® is certified for low NOx emission and outperforms industry standards *Rotating digital display allows for easy viewing *Tough, rustproof exterior handles the heat and weathers the elements Gas Type: Propane BTU Input: 200,000 Heater Size: 32.61 inch W x 23.02 inch D x 28.15 inch H Vent Diameter: Works for vent sizes 6-10 inch Outdoor: Stack-less Outdoor Venting System Ignition: Hot Surface Ignition Thermostats: 2 (1 for Pool / 1 for Spa) 6" clearance on all sides needed for proper operation.