Pentair ETi 400 ASME high efficiency natural gas pool heater, 400K BTU, part 461113Pentair ETi 400 High Efficiency Natural Gas Heater 400K, 461113 In stock$10,12199
Pentair ETi 400 ASME high efficiency natural gas pool heater, 400K BTU, part 461113
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Pentair ETi 400 High Efficiency Natural Gas Heater 400K, 461113

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$10,12199
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Quick overview

  • 96% thermal efficiency far more of the gas you burn ends up in the water than with a conventional atmospheric heater.
  • TitanTough heat exchanger a direct fire titanium exchanger, the toughest Pentair has built.
  • 400K BTU the largest ETi size, for big pools or fast heat-up on pool and spa combinations.
  • ASME version the code stamped exchanger specified for commercial and inspected installations.
  • Quiet running designed to run at a low noise level on the equipment pad.
  • Natural gas, 120/240V 60Hz intermittent ignition, with electrical service at either voltage.
Full description and specifications ↓

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Product details

The Pentair ETi 400 is a 400,000 BTU natural gas pool and spa heater rated at 96% thermal efficiency. This is the ASME version, part 461113, the one specified for commercial pools and for any job where the inspector wants a code stamped heat exchanger.

The TitanTough heat exchanger

Instead of a copper exchanger, the ETi 400 uses a direct fire titanium exchanger that Pentair calls TitanTough. Titanium shrugs off the water chemistry that shortens the life of copper, and firing the burner directly against it is how the heater reaches its efficiency figure. Pentair describes it as the toughest exchanger it has built.

Fast, quiet heat

At 400K BTU the ETi 400 is the largest size in the line, so it reaches the set temperature quickly on a large pool and can bring a spa up without a long wait. It is designed to run quietly on the pad and to install without special fuss.

Before you order

Confirm natural gas supply and 120/240V 60Hz electrical service. This heater ships by freight.

Specifications
Brand Pentair
Manufacturer part number 461113
UPC 788379877248
Type High efficiency pool and spa heater
Fuel Natural gas
Heat input 400,000 BTU/hr
Heat output 384,000 BTU/hr at 96 percent
Thermal efficiency 96 percent, by Pentair
Heat exchanger TitanTough direct fire titanium
Certification ASME
Electrical 120 or 240 VAC
Model ETi 400 NA
Ships Freight

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Questions and answers

What people ask about this product, answered by our pool techs.

How efficient is the Pentair ETi 400?
96 percent thermal efficiency, by Pentair, against 84 for its MasterTemp. At 400,000 BTU/hr input that is 384,000 BTU/hr into the water.
What is the heat exchanger on the ETi 400?
Pentair's TitanTough direct fire titanium exchanger. Pentair rates the heater at 96 percent thermal efficiency.
Is the Pentair ETi 400, 461113, natural gas or propane?
Natural gas. Pentair's manual lists 461113 as the ETi 400 NA, and its brochure says the ETi 250 is the model with a propane conversion kit.
Is the ETi 400 an ASME heater?
Pentair lists 461113 as ETi 400 NA - ASME in its manual. Whether a pool needs an ASME heater is for the local code and the inspector to say.
Where is the manual for the Pentair ETi 400?
Under Downloads on this page. It is Pentair's ETi 400 High Efficiency Heater Installation and User's Guide, part number 475349.
Does the ETi 400 have a pilot light?
No. Pentair's manual says it has direct spark ignition for heat on demand, with no standing pilot, and never to try to light the burners by hand.
Ask your own question