Heaters are in-stock and available for installation.

Efficiently heat up your pool for comfortable temperatures year-round with the ETi 250. With quick heat-up times and the durable TitanTough™ Direct-Fire Titanium, the toughest heat exchanger material, effectively warm up your pool. A great replacement for the MasterTemp® High-Performance Heater, with the same plumbing alignments to effectively serve your backyard oasis needs. Say goodbye to those after-pool shivers and hello to a cozy and warm backyard spa.

• Corrosion-resistant Titan-Tough™ Direct-Fire Titanium Heat Exchanger
• Up to 96% thermal efficiency.1 For every $1 of natural gas that’s piped into the heater, up to 96 cents goes directly to heating your pool, ensuring optimal heating
• Certified for low NOx emissions 2
• Certified for Category IV PVC exhaust venting and air intake 3
• 360° gas line connection options for ease-of-installation
• 270° control panel orientation options for ease of access.
• Large removable panels make accessing the heater internals easier
• Plumbing aligns exactly with MasterTemp® and Max-E-Therm® heaters, making ETi 250 an ideal drop-in replacement on tight equipment pads
• Three-year parts and labor warranty

_{*The ETi 400 is 96% efficient. The ETi 250 is 94% efficient when operated on natural gas and is 96% efficient when operated on propane with an available conversion kit.} 

• Brochure
  
• InstallGuide
• Ops Man

Specifications:

• Brand: Pentair
• Application: Pool
• BTU Output: 250,000 British thermal unit
• Weight: 220 pounds
• Fuel Type: Natural Gas
• Phase: Single
• UPC Code: 788379877491
• Part Number: 461112 ETi 250 High-Efficiency Heater, Natural Gas

Accessories:

• 462057: ETi 250 High-Altitude Conversion Kit for 2,000 ft - 10,000 ft, Natural
• 476370: ETi 250 Propane Conversion Kit from 0 - 2,000 ft, Propane