- ENERGY STAR® certified with a UEF of 0.95
- Compact Design—Space-saving design suitable for indoor and outdoor installations
- Extended Lifespan—X3® Technology ensures the heater lasts up to three times longer, reducing replacement costs
- Safety Features—Includes exhaust and water temperature safety controls, overheat cut-off fuse, and Air-Fuel Ratio (AFR) sensor for safe operation
- Flexible Venting Options—Supports Category III or IV venting with PVC, CPVC, polypropylene, or ABS pipes for intake and exhaust
- Recirculation Capability—Compatible with external recirculation pumps and cross-over valves for enhanced water flow
- Internal Freeze Protection System—Ensures reliable performance in colder climates
- Durable Heat Exchangers—Primary heat exchanger made of commercial-grade copper for superior heat transfer
- 15-year limited warranty on heat exchanger
Proline® XE Condensing Tankless water heaters are designed to deliver exceptional performance and durability. Innovative X3® Technology eliminates the need for annual descaling and prevents scale buildup, ensuring the heater maintains like-new performance for and lasts up to three times longer than traditional models. Durable heat exchangers, constructed from commercial-grade copper and 316L stainless steel, provide superior corrosion resistance.
These tankless water heaters are equipped with an overheat cut-off fuse and an Air-Fuel Ratio (AFR) sensor, ensuring safe and reliable operation. With flexible venting options and compatibility with external recirculation pumps, the Proline® XE models offer versatile installation options. These heaters provide peace of mind and long-term value and are backed by an industry-leading 15-year heat exchanger warranty with no hard water exclusions.
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