So Long Shivers! 

The ETi 250 transforms your pool into the spa you've been longing for. 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.

 

Up to 96% thermal efficiency*, the highest efficiency ever built in its class 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.

 

 

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.

 

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.

 

The ETi 250 pool heater requires altitude compensation for places above 4,500 ft. therefore, the heater needs a reduction of gas flow (derating) to obtain a complete combustion and avoid ignition issues. The ETi 250 pool heater can be installed without derating the heater up to 4500 ft. For locations at elevation above 4500 ft and up to 10,000 ft, the heater can be installed for natural gas only in the USA and Canada.

 

476375 - ETi 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.

 

476370 - ETi 250 Propane Conversion Kit - From 0 - 2,000 feet