ETi® 250 High-Efficiency Pool & Spa Heater

Pool heater at angle with touch screen and nozzles visibile

Control panel on heater with size buttons

Sand and black color with plugs and nozzles

Pool heater with control panel open and vent side visible

ETi® 250 High-Efficiency Pool & Spa Heater

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 Titan-Tough™ 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*. 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 Titan-Tough™ 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.
Three-year parts and labor warranty

Explore purchase options available for this product.

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 are 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

Resources

Downloads

Manuals

Brochure | Gas Pool Heaters Family BrochureFamily Brochure | Gas Pool Heaters

ETi 400 & ETi 250 Family Brochure - Spanish

Specifications

Item #	DESCRIPTION	Gas Type	BTUs	DIMENSIONS	Weight (LBS)	Voltage	Breaker Size
461112	ETi 250 High-Efficiency Pool Heater	Natural	250,000	25L x 25W x 32H	270	120 or 240/60Hz/1Ph	15 AMP
462057	ETi 250 High-Altitude Conversion Kit for 2,000 ft - 10,000 ft	Natural		12L x 7W x 5H	2
476370	ETi 250 Propane Conversion Kit from 0 - 2,000 ft	Propane		8L x 8W x 8H	2

Item #	DESCRIPTION	Gas Type	BTUs	DIMENSIONS	Weight (LBS)	Voltage	Breaker Size
461112	ETi 250 High-Efficiency Pool Heater	Natural	250,000	25L x 25W x 32H	270	120 or 240/60Hz/1Ph	15 AMP
462057	ETi 250 High-Altitude Conversion Kit for 2,000 ft - 10,000 ft	Natural		12L x 7W x 5H	2
476370	ETi 250 Propane Conversion Kit from 0 - 2,000 ft	Propane		8L x 8W x 8H	2

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Item #	DESCRIPTION	Gas Type	BTUs	DIMENSIONS	Weight (LBS)	Voltage	Breaker Size
461112	ETi 250 High-Efficiency Pool Heater	Natural	250,000	25L x 25W x 32H	270	120 or 240/60Hz/1Ph	15 AMP
462057	ETi 250 High-Altitude Conversion Kit for 2,000 ft - 10,000 ft	Natural		12L x 7W x 5H	2
476370	ETi 250 Propane Conversion Kit from 0 - 2,000 ft	Propane		8L x 8W x 8H	2

Show less

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.

Support & Resource Tools

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

ETi® 250 High-Efficiency Pool & Spa Heater

ETi® 250 High-Efficiency Pool & Spa Heater

So Long Shivers