A.O. Smith ATI-540H-N ProLine XE 10.0 GPM 199,000 BTU Indoor Condensing Ultra-Low NOx Natural Gas Tankless Water Heater

Product Description

A.O. Smith ProLine XE ATI-540H-N is an indoor condensing natural gas tankless water heater with up to 199,000 BTU/h input and 10.0 GPM maximum flow. A commercial-grade copper primary heat exchanger and stainless-steel secondary heat exchanger recover heat from combustion gases. Integrated temperature control and diagnostics support operation and servicing. Actual hot-water flow depends on temperature rise and installation conditions.

Specifications

• Manufacturer / Brand: A.O. Smith
• Model / MPN: ATI-540H-N
• Fuel / installation: Natural gas / indoor condensing
• Input range: 15,000-199,000 BTU/h
• Maximum flow: 10.0 GPM; temperature-rise dependent
• UEF: 0.93
• Height / width / depth: 23-5/8 / 17-3/4 / 11-1/4 inches
• Water / gas connections: 3/4-inch NPT
• Limited warranty: Residential heat exchanger 15 years; parts 5 years; commercial terms differ
• Approximate shipping weight: 71 lbs

Installation & Compatibility

Confirm the model, dimensions, connections and installation requirements against the supplied unit and manufacturer instructions. Manufacturer warranty coverage depends on the product, application and applicable written terms.

Technical Specifications

Frequently Asked Questions