Titanium is known for excellent corrosion resistance, high strength and light weight. The job of the heat exchanger is to capture the heat from burning gas and transfer it to your pool's water the more efficiently, the better. But, the combination of operating heat and pool water chemistry can be tough on exchangers, leading to corrosion and failure. That’s why we made the ETi 400 high-efficiency Heater's direct-fire heat exchanger from titanium. It provides long life under extreme conditions.

 

With the ETi 400 and ETi 250 high efficiency heaters, say goodbye to those icy pool shivers and hello to cozy temperatures year round. Heating options are available to suit any pool or spa, allowing you to have the warm and inviting backyard oasis of your dreams. 

 

Get the most out of your heater with heat-up times that can make a last-minute swim or spa a warm delight. Regardless of whether you've planned for your next swim, your heater can save the day as well as save up to 14% on energy costs compared to a traditional gas heater.

 

476072 - ETi 400 Natural Gas to Propane Conversion Kit - The ETi 400 heater is factory-configured for use with Natural Gas. For applications using Propane Gas, this conversion kit is required.

 

475612 - ETi 400 Condensate Neutralizer Replacement Kit - ETi 400 heater produces condensate while in operation. The pH level of the condensate is between 3.1 and 4.2, and Pentair recommends that users neutralize the condensate by installing the optional ETi 400 Condensate Neutralizer Kit.

 

475971 - ETi 400 Indoor Direct Air Intake Kit - For applications in which the ETi 400 will be installed indoors using a Direct Air Intake, use this kit for simplified installation.

 

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

 

**All calculations are estimates. Actual results may vary due to a range of factors including, but not limited to: environmental conditions, pool type/construction/materials/configuration, geographical location, installation details and various operational parameters. Cost savings estimates are based on 65°F air temperature and 82°F water target for an uncovered pool operating 180 days under moderate wind conditions and the cost of natural gas is $1.22 per 100,000 BTU and comparing energy use to a gas heater that is 82% efficient. For assistance with sizing and selecting a pool heating product, please consult a swimming pool professional.