- ENERGY STAR® certified with a UEF of 0.95
- Scale Prevention & Prolonged Performance—X3® Scale Prevention Technology prevents build-up and prolongs the life of the heat exchanger by up to 300%
- Optimized Heat Transfer—Primary commercial-grade copper heat exchanger is 25x better than stainless steel at heat transfer, stabilizing outgoing water temperatures quickly
- Corrosion Protection—Secondary heat exchanger is made of 316L Stainless Steel to protect against corrosion
- Can Pair with Recirculation Pump—Capable of working with a recirculation pump when fitted with a cross-over valve (sold separately)
- Safety Features—Added safety features include a flame sensor, temperature monitoring, and an overheat cutoff fuse
- Peace of Mind—Industry-leading 15-year limited warranty covers scale-related failures
The State ProLine® XE GTS-340X3-NIH Indoor Tankless Condensing water heater uses up to 180,000 BTU/hr of natural gas to deliver an endless supply of hot water for a 2.5-bath home in northern climates and a 3.5-bath home in southern climates (one shower head per bath).
Built-in X3® Scale Prevention Technology helps maintain like-new performance by protecting the heat exchanger from build-up. Scale-prevention protection can prolong the life of the heat exchanger by up to 300% compared to an unprotected unit.
This ENERGY STAR® certified Ultra-Low NOx model with condensing technology has a Uniform Energy Factor of 0.95 and meets the ASHRAE 90.1b-1992 energy efficiency requirements, making it environmentally friendly and reducing operating costs.
The GTS-340X3-NIH uses commercial-grade copper alloy for the heat exchanger tubing and is approved to work with an external recirculation pump and cross-over valve. Indoor models are certified up to a 10,100 ft. altitude.
The GTS-340X3-NIH tankless condensing water heater provides years of hot water through innovation and quality and is backed by an industry-leading 15-year limited warranty.
Condensing Tankless with X3® Technology - Cartridge Installation
Condensing Tankless with X3® Technology - 111 Ignition Failure
Condensing Tankless with X3® Technology - 121 Loss of Flame
Condensing Tankless with X3® Technology - 991 Imperfect Combustion