A.O. SMITH A.O. Smith ATO-540H-N 199,000 BTU ATI-540H Condensing Ultra-Low NOx Indoor Tankless Water Heater
A.O. SMITH A.O. Smith ATO-540H-N 199,000 BTU ATI-540H Condensing Ultra-Low NOx Indoor Tankless Water Heater
A.O. SMITH A.O. Smith ATO-540H-N 199,000 BTU ATI-540H Condensing Ultra-Low NOx Indoor Tankless Water Heater
A.O. SMITH A.O. Smith ATO-540H-N 199,000 BTU ATI-540H Condensing Ultra-Low NOx Indoor Tankless Water Heater
A.O. SMITH A.O. Smith ATO-540H-N 199,000 BTU ATI-540H Condensing Ultra-Low NOx Indoor Tankless Water Heater
A.O. SMITH A.O. Smith ATO-540H-N 199,000 BTU ATI-540H Condensing Ultra-Low NOx Indoor Tankless Water Heater
A.O. SMITH A.O. Smith ATO-540H-N 199,000 BTU ATI-540H Condensing Ultra-Low NOx Indoor Tankless Water Heater
A.O. SMITH A.O. Smith ATO-540H-N 199,000 BTU ATI-540H Condensing Ultra-Low NOx Indoor Tankless Water Heater

A.O. Smith ATO-540H-N 199,000 BTU ATI-540H Condensing Ultra-Low NOx Indoor Tankless Water Heater

A.O. SMITH
Brand: A.O. SMITH
SKU: ATO-540H-N
Availability: In Stock

Ships via freight in 1-3 business days
$1,401.74
$1,401.74
LTL Delivery

This product weighs 59 lb each and will be shipped via LTL carrier. A lift gate option will be added free of charge for your convenience.

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Description

Product Description

The A.O. SMITH ATO-540H-N is a condensing ultra-low NOx indoor tankless water heater. This unit uses up to 199,000 BTU/hr of natural gas to deliver an endless supply of hot water. It is highly efficient with a Uniform Energy Factor (UEF) of 0.93.

  • Continuous flow rate up to 10.0 GPM
  • Primary commercial-grade copper heat exchanger stabilizes outgoing water temperatures quicker
  • Secondary heat exchanger is made of 316L Stainless Steel to protect against corrosion

Product Highlights

This A.O. Smith tankless water heater provides years of hot water through innovation and quality. It is a residential product built to commercial-grade standards.

Product Information

Standard Information

  • Brand: A.O. SMITH
  • Manufacturer Part Number: ATO-540H-N
  • Country of Origin: US
Technical Specifications
Product Type
Tankless Heater
Installation Type
Indoor Only
Type
Space Saving
Fuel Type
Natural Gas
BTU Input
199,000
BTU (Min)
15000
Vent Type
Direct Vent
Energy Factor
0.93
Gas Connection
3/4"
Water Connection
3/4"
Voltage
120
Application
Residential
Max Flow (GPM)
10
Inlet Gas Pressure
4.0-10.5"W.C
Depth (Inches)
11.25
Width (Inches)
17.75
Height (Inches)
23.625
Flow Rate at 70F Temp Rise (GPM)
5.4
Flow Rate at 40F Temp Rise (GPM)
9.5
Flow Rate at 50F Temp Rise (GPM)
7.5
Flow Rate at 60F Temp Rise (GPM)
6.3
UEF
0.95
Maximum BTUs
199,000
Power Source
gas_powered
Water Connection Location
Bottom
Emissions
Ultra-Low NOx
ASME Certified
No
Digital Display
Yes
ENERGY STAR Certified
Yes
GPM (@67 F Temp Rise)
5.8 GPM
Minimum BTUs
15,000
Product Tier
ProLine XE
Side Loop
No
Item Type
Water Heater
Gallons
Tankless
Water Heater Type
Residential/Commercial
Venting
Power Direct Vent
Venting Type
Power Direct Vent
Energy Star
Yes
Connection Size
3/4"
Activation GPM
0.5
Duct Size
3" Round, 4" Round
Maximum Flow Rate
9.5 GPM
Minimum Flow Rate
4.9 GPM
Minimum Gas Input
15000
Vent Maximum Run
1200, 840 in.
Water Pressure (Max)
150 PSI
Water Pressure (Min)
15 PSI
Gas Connection Type
3/4" NPT
Heating Technology
Condensing
Indoor Installation
No
Natural Gas Pressure (Max)
10.5
Altitude Certification
6000 ft.
Amperage
0.74
Condensing
Yes
Default Temperature
122
Approved for Commercial Use
Yes
Certifications
AHRI, ANSI, CSA, NSF
Collection
ProLine
Low Lead Compliant
Yes
Made in America
Yes
Mobile Home Approved
No
Outdoor Approved
Yes
Product Variation
Whole House Water Heater
SCAQMD Compliant
Yes
Title 20 Compliant
Yes
Special Feature
Air-Fuel ratio (AFR) sensor
Material Type
Copper, Stainless Steel
A.O. SMITH A.O. Smith ATO-540H-N 199,000 BTU ATI-540H Condensing Ultra-Low NOx Indoor Tankless Water Heater

A.O. SMITH

A.O. Smith ATO-540H-N 199,000 BTU ATI-540H Condensing Ultra-Low NOx Indoor Tankless Water Heater

$1,401.74
A.O. SMITH A.O. Smith ATO-540H-N 199,000 BTU ATI-540H Condensing Ultra-Low NOx Indoor Tankless Water Heater
A.O. SMITH A.O. Smith ATO-540H-N 199,000 BTU ATI-540H Condensing Ultra-Low NOx Indoor Tankless Water Heater
A.O. SMITH A.O. Smith ATO-540H-N 199,000 BTU ATI-540H Condensing Ultra-Low NOx Indoor Tankless Water Heater
A.O. SMITH A.O. Smith ATO-540H-N 199,000 BTU ATI-540H Condensing Ultra-Low NOx Indoor Tankless Water Heater

A.O. SMITH

A.O. Smith ATO-540H-N 199,000 BTU ATI-540H Condensing Ultra-Low NOx Indoor Tankless Water Heater

$1,401.74

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