ETi® 400 High Efficiency Gas Heater More Staying Power. More Saving Power. The ETi 400 High Efficiency Heater features the TitanTough™ Direct-Fire Pure Titanium Heat Exchanger, the longest-lasting heat exchanger ever built. And it delivers 96% thermal efficiency, the highest of any pool heater. Downloadable: Product Information Installation & Operation Instructions PowerMax High Performance Commercial Pool Heaters
