A. O. Smith ProLine(R) XE Ultra-Low NOx Outdoor 180,000 BTU Condensing Natural Gas Tankless Water Heater

 •Endless Hot Water
 •Continuous flow rate up to 8.0 GPM
 •Primary commercial-grade copper heat exchanger is 25x better than stainless steel at heat transfer, stabilizing outgoing water temperatures quicker
 •Secondary heat exchanger is made of 316L Stainless Steel to protect against corrosion
 •Highly efficient condensing Ultra-Low Nox tankless water heater delivers up to .94 Uniform Energy Factor (UEF)
 •Flexible power direct vent design allows for venting up to 100 feet using either PVC, CPVC, polypropylene or ABS Pipe (solid core)
 •Common vent up to 8 units
 •Includes a wall mount temperature remote controller and advanced diagnostics to simplify troubleshooting
 •Safety features include exhaust & water temperature safety control, overheat cut-off fuse and air-fuel ratio (AFR) sensor
 •15-year limited warranty on heat exchanger in residential applications

The 340H Series offers high efficiency Ultra-Low NOx condensing technology allowing for the use of 3 PVC venting and has 0 clearance to combustibles. Features copper primary and 316L stainless steel heat ex-changers to provide high efficiency operation and excellent corrosion resistance. Outdoor models include a remote controller as a standard feature. Indoor models are certified up to 10,100 ft. altitude. Provides a variety of installation options: indoor, outdoor and direct vent. Complies with Ultra-Low NOx regulations and meets the energy efficiency requirements of ASHRAE 90.1b-1992. The ATO-340H-N tankless 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 up to a 3.5 bath home in southern climates (one shower head per bath). Utilizing condensing technology, this heater is extremely efficient with a Uniform Energy Factor of 0.94. With an industry leading 15-year limited warranty, the ATO-340H-N tankless water heater provides years of hot water through innovation and quality. A. O. Smith s ProLine(R) water heaters are residential products built to commercial-grade standards and are only available for purchase through professional wholesalers and contractors.