AO Smith ATI-510U-N ProLine® XE, 199 Input MBtu, Non-Condensing, Residential Natural Gas/Liquid Propane Tankless Water Heater, Ultra-Low NOx, Direct Vent, Indoor, 15 Year limited Heat Exchanger/5 Year Parts Warranty

The 510U is well suited for residential/commercial applications such as small restaurants and beauty salons. It features a commercial grade copper heat exchanger with a thicker heat exchanger drum which is suitable for commercial applications or heavier-residential usages such as space heating or domestic recirculation systems. The design allows for a variety of installation options. Complies with Ultra-Low NOx regulations and meets the energy efficiency requirements of ASHRAE 90.1-b 1992. Easy-Link System capable up to 4 units. Multi-Link system capable up to 20 units. The ATI-510U tankless water heater uses up to 199,000 BTU/h of natural gas/liquid propane to deliver an endless supply of hot water for a 2.5 bath home in northern climates and up to a 4 bath home in southern climates (one shower head per bath). The ATI-510U has a Uniform Energy Factor of 0.81. With an industry leading 15-year limited warranty, the ATI-510U tankless water heater provides years of hot water through innovation and quality. A. O. Smith’s ProLine® water heaters are residential products built to commercial-grade standard and are only available for purchase through professional wholesalers and contractors.

• Continuous flow rate up to 10.0 GPM
• Wall-mount design saves valuable space and allows for additional storage and flexibility
• Commercial-grade copper heat exchanger is 25x better than stainless steel at heat transfer, stabilizing outgoing water temperatures quicker
• Easily convertible from natural gas to propane with supplied kit
• Highly efficient condensing Ultra-Low Nox tankless water heater delivers up to .81 Uniform Energy Factor (UEF)
• Vents up to 60 feet using 4” Category III Stainless Steel
• Includes integrated temperature controls and advanced diagnostics to simplify troubleshooting
• Safety features include built-in freeze protection, overheat cut-off fuse and air-fuel ratio (AFR) sensor
• 15-year limited warranty on heat exchanger in residential applications