A.O. Smith ATI-540HX3-N Tankless Water Heater 199,000 BTU

Product Description

The A.O. SMITH ATI-540HX3-N condensing gas tankless water heater features X3 Scale Prevention Technology, lasting three times longer than other tankless models. It delivers continuous hot water while protecting against scale build-up. This heater complies with Ultra-Low NOx regulations and utilizes commercial-grade copper alloy for the heat exchanger tubing.

• Maintains like-new performance for the product's life, unlike tankless models without X3.
• Features a primary commercial-grade copper heat exchanger.
• Wall-mount design saves valuable space and allows for additional storage and flexibility

Product Highlights

This highly efficient condensing tankless water heater delivers up to .93 Uniform Energy Factor (UEF).

Product Information

Standard Information

• Brand: A.O. SMITH
• Manufacturer Part Number: ATI-540HX3-N
• Country of Origin: US

Technical Specifications

• Product Type: Tankless Water Heater
• Type: Condensing
• Fuel Type: Natural Gas
• Installation Type: Indoor Only
• Water Connection: 3/4"
• Gas Connection: 3/4"
• Inlet Gas Pressure: 4.0-10.5"W.C
• BTU (Min): 15000
• Gas Input: 15000-199000 BTU/h
• BTU (Max): 199000
• Voltage: 120v
• Max Flow (GPM): 10
• Height (Inches): 23.625"
• Depth (Inches): 11-1/4"
• Width (Inches): 17-3/4"
• Energy Factor: 0.93
• Vent Type: Power Direct Vent
• Application: Residential
• Flow Rate at 40F Temp Rise (GPM): 6.7
• Flow Rate at 50F Temp Rise (GPM): 6.1
• Flow Rate at 60F Temp Rise (GPM): 5
• Flow Rate at 70F Temp Rise (GPM): 4.3
• UEF: 0.93
• Maximum BTUs: 199,000
• Power Source: GAS
• Water Connection Location: BOTTOM
• Emissions: Ultra-Low NOx
• ASME Certified: No
• Digital Display: Yes
• Flue Diameter: 4.00
• Fuel Source: NATURAL
• GPM (@67 F Temp Rise): 5.8 GPM
• Minimum BTUs: 15,000
• Activation GPM: 0.5
• Depth (in.): 11.25
• Duct Size: 3" Round, 4" Round
• Height (in.): 23.625
• Maximum Flow Rate: 9.5 GPM
• Maximum Gas Input: 199000
• Minimum Flow Rate: 4.8 GPM
• Minimum Gas Input: 15000
• Water Pressure (Max): 150 PSI
• Water Pressure (Min): 15 PSI
• Width (in.): 17.75
• Direct Vent: Yes
• Display Type: LCD
• Heating Technology: Condensing
• Indoor Installation: Yes
• Water Connection Type: NPT
• Altitude Certification: 10100 ft.
• Condensing: Yes
• Default Temperature: 120 "0F
• Energy Star: Yes
• Low Lead Compliant: Yes
• Outdoor Approved: No
• Product Variation: Whole House Water Heater
• SCAQMD Compliant: Yes
• Title 20 Compliant: Yes
• Gas Type: NG Natural Gas
• Commercial/Residential/Dual: Commercial/Residential
• Condensing/Non Condensing: Condensing
• Flow Rate: 10 gpm
• Heating Capacity: 199000 Btu/hr
• Ignition Type: Electronic Spark
• Indoor/Outdoor: Indoor
• Pressure Rating: 15 to 150 psi
• Series: ATI-540HX3-N
• Ultra Low NOx: No
• Vent Size: 3/4 in
• Application Type: For Residential
• Frequency: 60 Hertz
• ANSI Certification: Z21.10.3
• Certifications: AHRI, ANSI, CSA