Product Overview

The Pentair ETi® 250 High Efficiency Pool Heater 461112 is a premium 250,000 BTU natural gas pool and spa heater built for strong heating performance, high efficiency, and long-term durability. Designed with Pentair’s ETi high-efficiency platform, this heater helps reduce energy waste while delivering dependable heat-up for residential pools, spas, and smaller commercial-style applications.

The ETi 250 features a Titan-Tough™ Direct-Fire Titanium Heat Exchanger with ASME-certified construction, giving it excellent corrosion resistance and durability compared to standard copper heat exchanger designs. It is a strong choice for pool owners who want efficient heating, premium construction, and dependable performance in a compact heater footprint.

Ideal For

Residential in-ground pools

Pool and spa combination systems

Smaller commercial-style pool applications

Customers wanting a high-efficiency gas heater

Natural gas pool heating systems

Pool owners upgrading from a standard gas heater

Applications where corrosion resistance is important

Equipment pads where premium efficiency is preferred

Key Features

250,000 BTU heating performance

High-efficiency ETi heater design

Natural gas operation

Titan-Tough™ Direct-Fire Titanium Heat Exchanger

ASME-certified heat exchanger construction

Up to 96% thermal efficiency platform

Digital control panel for easy operation

Low NOx performance

Multiple orientation options for easier gas line connection

Easy-access keypad positioning

Compact footprint for tighter equipment pad layouts

Built for reliable pool and spa heating performance

Benefits

The Pentair ETi 250 is designed for pool owners who want more efficiency and durability than a standard gas heater. Its high-efficiency design helps reduce wasted heat, while the titanium heat exchanger provides excellent corrosion resistance for long-lasting performance.

With 250,000 BTUs of heating output, the ETi 250 is a strong fit for residential pools, spas, and applications where a 400K BTU heater may be more than the system needs. The digital controls make operation simple, and the compact design helps make installation easier on many equipment pads.

Specifications

Warranty & Compatibility

Compatibility & Ordering Notes

Confirm this is the correct 250,000 BTU ETi model before ordering.

Verify that natural gas is the correct fuel type for your installation.

Confirm BTU sizing, gas line size, gas supply, electrical requirements, plumbing layout, venting requirements, clearances, and local code requirements before installation.

For propane applications, verify the required propane configuration or available conversion requirements before ordering.

Professional installation is strongly recommended.

Installed or used heaters may not be eligible for return.

Customer-Facing Q&A

Q: Is Pentair 461112 natural gas or propane?
A: Pentair 461112 is commonly listed as the natural gas ETi 250 heater. Always verify fuel configuration before installation.

Q: How many BTUs is this heater?
A: This heater is rated at 250,000 BTUs.

Q: What makes the ETi 250 different from a standard gas heater?
A: The ETi 250 is a high-efficiency heater with a titanium ASME-certified heat exchanger, giving it improved efficiency and corrosion resistance compared to many standard gas heater designs.

Q: What type of heat exchanger does it use?
A: It uses Pentair’s Titan-Tough™ Direct-Fire Titanium Heat Exchanger.

Q: Is this heater ASME certified?
A: The ETi 250 features ASME-certified heat exchanger construction.

Q: Can this heater run on 120V or 240V?
A: Yes. This model is commonly listed with 120/240 VAC electrical capability.

Q: Is this heater good for large pools?
A: The 250K BTU size is a strong option for many residential pools and spas. Larger pools, colder climates, or customers wanting faster heat-up may need a larger BTU heater.

Q: Is professional installation recommended?
A: Yes. Gas pool heaters should be installed by a qualified professional to ensure proper gas, electrical, plumbing, venting, and safety setup.

Q: What should I verify before ordering?
A: Confirm fuel type, BTU sizing, gas supply, electrical requirements, plumbing compatibility, venting requirements, clearances, and local code requirements.