Pentair Max-E-Therm Low Propane Heater 333K BTU

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When the water is just right, you can maximize your experience in a pool or spa. The fast heating Pentair Max-E-Therm Low Propane Heater 333K BTU ensures that your pool always stays warm even on chilly nights.

Contrary to some other heaters on the market, this product offers you the latest advances in heating technology including a rustproof housing to effectively handle the heat, compact design for custom or retrofit installations, a six-position control panel that support easy usage, and a convenient temperature readout with two thermostat controls.

Great for outdoor and indoor installations on spas and pools, the product can connect directly to Sta-Rite System:3® Mod Media Filter as well as other systems.

The heater is the lightest in its class, but despite its size, the product still delivers the best-in-class energy efficiency with a rating of 84 percent.


  • Lightweight – lightest heater in its class
  • Best in class energy efficiency
  • Compact design – ideal for retro-fit installations
  • Easy to switch – change gas sources with installation of separate orifice
  • Environmentally friendly – all units are low NOx
  • Rustproof housing – sleek, matte black enclosure is made of Dura-Glas® – an exclusive Sta-Rite® material that handles the heat and weathers the elements
  • Lower operating costs – 84% efficiency rating – rated first in its class for highest energy efficiency
  • Custom or retrofit – direct-connects to Sta-Rite® System:3® Mod Media filter or easily fits other systems
  • Certified for outdoor and indoor installations


  • Brand : Pentair
  • SubBrand : Max-E-Therm®
  • Item : Pool and Spa Heater
  • Type : High Performance
  • Gas Type : Liquid Propane
  • Control Type : Digital
  • BTUH Input : 333000
  • Cabinet Width : 25.15 Inch
  • Cabinet Depth : 31.69 Inch
  • Cabinet Height : 30.03 Inch
  • Water Connection : 2 Inch
  • Voltage Rating : 120/240 VAC
  • Frequency Rating : 60 Hz
  • Phase : 1-Phase
  • Flow Rate : 120 gpm


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