The MasterTemp 400 Heater provides energy-saving and advanced operating features that are available only from much larger heaters. With its revolutionary pre-mixed gas combustion technology, the MasterTemp 125 Heater offers 82% thermal efficiency, the highest in its class. The advanced LCD/controller provides more information and better control.

• High-performance, affordable heater with premium features
• 82% energy efficiency is the highest in the class
• 1-1/2 in. Plumbing connection — ideal for smaller bodies of water, including aboveground pools, spas, and inground pools up to 15,000 gallons
• Pre-mixed combustion technology for ultra-fast heat up
• Easy-to-use digital display/controller
• Certified for low NOx emissions
• Available in natural gas or propane gas
• Lightweight: 80 lbs. — easy to handle and ship
• Corrosion and UV-resistant enclosure
• 3/4 in. gas line up to 50 ft. from the source
• Certified for outdoor and indoor installations
• For Air Intake Kit order part number 474845