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Sta-Rite Max-E-Therm 400K BTU Low NOx Pool and Spa Heater - Natural Gas - SR400NA

In Store Only - 714-564-9100
Part Number:
138.00 LBS

Product Description

Sta-Rite Max-E-Therm 400K BTU Low NOx Pool and Spa Heater - Natural Gas - SR400NA


Max-E-Therm is the lightest heater in its category, with best-in-class energy efficiency*. It features an LED temperature readout with dual thermostat controls, temperature safety lockout and a six-position control panel for easy operation.

  • Lightweight—lightest heater in its class
  • 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—directly connects to Sta-Rite System:3® Mod Media Filter or easily fits other systems
  • Certified for outdoor and indoor installations

*Standard Copper Heat Exchanger 84% efficient. Heavy-Duty (HD) Cupro-Nickel Heat Exchanger 82% efficient.


SR200NA Max-E-Therm 200 Natural 200 26x26x30 131
SR200LP Max-E-Therm 200 Propane 200 26x26x30 131
SR200HD Max-E-Therm 200 HD Natural 200 26x26x30 131
460767 Max-E-Therm 250 ASME Natural 250 26x26x30 151
460768 Max-E-Therm 250 ASME Propane 250 26x26x30 151
SR333NA Max-E-Therm 333 Natural 333 26x26x30 138
SR333LP Max-E-Therm 333 Propane 333 26x26x30 138
SR333HD Max-E-Therm 333 HD Natural 333 26x26x30 138
SR400NA Max-E-Therm 400 Natural 400 26x26x30 138
SR400LP Max-E-Therm 400 Propane 400 26x26x30 138
SR400HD Max-E-Therm 400 HD Natural 400 26x26x30 138
460763 Max-E-Therm 400 ASME Natural 400 26x26x30 149
460764 Max-E-Therm 400 ASME Propane 400 26x26x30 149


Additional Information


Owners Manual 

Burner System Parts

Electrical System Parts

Water System Parts

Connection Tube Installation Instructions

Heater Installation Check List

Warranty Information

Product Registration


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