ETi® 250 High-Efficiency Pool and Spa Heater

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ETi® 250 High-Efficiency Pool and Spa Heater

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So Long Shivers

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.

Key features and benefits:

  • Up to 96% thermal efficiency*. For every $1 of natural gas that’s piped into the heater, up to 96 cents go directly to heating your pool, ensuring optimal heating.
  • The TitanTough™ Direct-Fire Titanium Heat Exchanger is resistant to corrosion and is the toughest heat exchanger ever built—for years of high-quality, trustworthy warmth.
  • A variety of installation features, including multiple orientation options for gas line connection and easy-access keypad positioning.
  • The ETi 250 is 250,000 BTUs (BTU is the quantity of heat needed to raise one pound of water by one degree Fahrenheit). The higher the BTUs, the higher the heating power, and the faster your pool can heat up.

*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 available conversion kit. 

Find out where to purchase online or in a retail location near you.
Where to Buy

3 FACTORS TO CONSIDER IN YOUR HEATING SOLUTION PURCHASE

Size of heater. Pool heaters and heat pumps are sized based on their heating capacity, measured in British Thermal Units (BTUs). A BTU is a measure of how much energy is required to heat 1 gallon of water by 1F. Most heat pumps can deliver between 100,000 – 150,000 BTUs depending on their size and most gas pool heaters are sized between 175,000 – 400,000 BTUs.

Geographic location, availability of gas, and electricity costs in your pool location are all factors in selecting a pool heater or heat pump. In general, heat pumps thrive in areas with mild to warm climates where electricity costs and low to moderate. Gas heaters aren’t heavily impacted by environmental conditions and can be a great option in cooler climates where gas prices are low to moderate.

Size and features of your pool. The size of your pool may dictate which system you need. We recommend working with your pool professional to identify the right pool heater for your backyard oasis. The ETi 250 is an ideal drop in replacement for MasterTemp and Max-E-Therm heaters, thanks to its identical plumbing alignment.

Shivers Say Goodbye, Heat Say Hello

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.

ETi 400 and ETi 250 both offer years of high quality, trustworthy corrosion resistance and easy venting to warm your pool efficiently. The compact ETi 250 shares all the robust features of its larger counterpart. That’s why the convenient size of the ETi 250 make it an ideal upgrade from the MasterTemp® High Performance Heater.

side view of the ETi size chart for ETi PDP
Size chart for ETi 250 PDP

Specifications

Item #DESCRIPTIONGas TypeBTUsDIMENSIONSWeight (LBS)VoltageBreaker Size
461112ETi 250 High-Efficiency Pool HeaterNatural250,00025L x 25W x 32H270120 or 240/60Hz/1Ph15 AMP
462057ETi 250 High-Altitude Conversion Kit for 4,500 ft - 10,000 ftNatural 12L x 7W x 5H2  
476370ETi 250 Propane Conversion Kit from 0 - 2,000 ftPropane 8L x 8W x 8H2  
Item #DESCRIPTIONGas TypeBTUsDIMENSIONSWeight (LBS)VoltageBreaker Size
461112ETi 250 High-Efficiency Pool HeaterNatural250,00025L x 25W x 32H270120 or 240/60Hz/1Ph15 AMP
462057ETi 250 High-Altitude Conversion Kit for 4,500 ft - 10,000 ftNatural 12L x 7W x 5H2  
476370ETi 250 Propane Conversion Kit from 0 - 2,000 ftPropane 8L x 8W x 8H2  
  • 476375ETi 250 Condensate Neutralizer Replacement Kit - ETi 250 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 250 Condensate Neutralizer Kit.
  • 476371 - ETi 250 Indoor Direct Air Intake Kit - For applications in which the ETi 250 will be installed indoors using a Direct Air Intake, use this kit for simplified installation.
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