Pentair Max-E-Therm® Liquid Propane Gas Pool & Spa Heater 333K BTU

The Pentair Max-E-Therm® 333,000 BTU Liquid Propane (LP) Heater is a high-performance heating system engineered to deliver rapid warmth and exceptional efficiency for mid-to-large sized pools and spas. This model features a sophisticated pre-mixed combustion system that optimizes the propane-to-air ratio, ensuring industry-leading heat-up times while maintaining a "Low NOx" certification for eco-friendly operation. The unit is housed in a sleek, rust-proof enclosure made of Dura-Glas™—a high-grade composite resin that withstands harsh weather, UV rays, and corrosive pool chemicals far better than traditional metal cabinets. Internally, the heater is equipped with a heavy-duty cupro-nickel heat exchanger, providing superior resistance to the fluctuations in water chemistry often found in salt-chlorinated systems. Its intuitive digital control panel allows for precise temperature management and includes self-diagnostic indicators for easy troubleshooting. Despite its compact and space-saving design, the unit is built with a substantial internal firebox and industrial-grade plumbing that give it a solid, professional heft. The Pentair Max-E-Therm 333K BTU Liquid Propane Heater weighs approximately 138 pounds, serving as a durable, powerful, and highly reliable heating solution for modern aquatic environments.