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Pentair

Max-E-Therm

Gas Heater

The Pentair Max-E-Therm is a high-efficiency gas-fired pool heater available in 200,000 to 400,000 BTU sizes. Available in natural gas and propane with standard and ASME-certified configurations for residential and commercial applications.

Pentair Max-E-Therm High Performance Gas Heater
200,000 - 400,000 BTU/hr
BTU Range
Natural Gas or Propane
Gas Type
120/240 VAC, 60 Hz
Voltage

Specifications

Heating
BTU Range200,000 - 400,000 BTU/hr
Gas TypeNatural Gas or Propane
Gas Supply Pressure4-14 in water column
Electrical
Voltage120/240 VAC, 60 Hz
Max Amps5.0A
Physical
Inlet Size2 in PVC
Outlet Size2 in PVC

Pros & Cons

Pros

  • Available in 200K, 333K, and 400K BTU sizes
  • Both natural gas and propane models
  • ASME and Heavy Duty (HD) configurations available
  • Electronic ignition

Cons

  • Larger footprint than MasterTemp
  • 120/240V dual voltage wiring required

Error Codes & Troubleshooting

ERR PS
Water pressure switch fault
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ERR HLS
High limit switch tripped
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ERR IGN
Ignition failure
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ERR AFS
Air flow switch fault
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ERR AGS
Automatic gas shutoff
Troubleshoot this →

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Replacement Parts

PartPart NumberDescription
Air Intake Duct Kit475002Combustion air intake duct connection
Pressure Relief Valve4609253/4 in pressure relief valve

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