Home » Pentair Sta-Rite Max-E-Therm 400K BTU Heater SR400NA – Natural Gas Pool & Spa Heating

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Pentair

Pentair Sta-Rite Max-E-Therm 400K BTU Heater SR400NA – Natural Gas Pool & Spa Heating

SKU: SR400NA
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$3,999.00
In stock - 50 items available
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The Pentair Sta-Rite Max-E-Therm SR400NA Natural Gas Pool & Spa Heater delivers powerful 400,000 BTU heating performance in a compact, energy-efficient design. Built for fast heat-up times and reliable operation, Max-E-Therm heaters are trusted for both residential and light commercial pool and spa installations.

Featuring a high-efficiency copper heat exchanger, advanced digital controls, and a corrosion-resistant composite cabinet, the SR400NA provides consistent temperature control while operating quietly and efficiently. Its space-saving footprint and straightforward installation make it an excellent choice for equipment pads with limited room—without sacrificing heating power.
  • Model/SKU: SR400NA
  • BTU Rating: 400,000 BTU
  • Fuel Type: Natural Gas
  • Heat Exchanger: Copper
  • Ignition: Electronic ignition
  • Voltage: 120/240V
  • Plumbing Connections: 2”

  • Controls: Digital temperature display with diagnostics

  • Application: Residential and light commercial pools & spas
  • Backed by Pentair’s limited manufacturer warranty.
  • Designed to meet industry standards for safety and performance.