Pentair
ETI Gas Heater Natural Gas
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Available In-Store Only
The Pentair ETi High-Efficiency Natural Gas Heaters (250K & 400K) represent the pinnacle of pool heating technology. Featuring a TitanTough™ Direct-Fire Titanium Heat Exchanger, these units are built to withstand the harshest saltwater and chemical environments. With an industry-leading 96% thermal efficiency rating, they deliver faster heat-up times and significant fuel savings, making them the most cost-effective and durable natural gas heaters available for modern pools and spas.
Key Features
- Titanium Heat Exchanger: Pure titanium construction offers unmatched corrosion resistance and a longer service life.
- Maximum Energy Efficiency: Up to 96% thermal efficiency ensures nearly every BTU of natural gas goes directly into the water.
- Fast Heat-Up Times: High-performance burners get your pool or spa to the perfect temperature in record time.
- Flexible Installation: Features a rotatable front door and versatile plumbing for easy "drop-in" replacement of MasterTemp heaters.
- Ultra-Quiet Operation: Sophisticated design minimizes noise to maintain a peaceful backyard environment.
- Category IV Venting: Certified for PVC exhaust venting, allowing for long runs and flexible indoor or outdoor placement.
