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A.O. Smith ATO-540H - 6.3 GPM at 60° F Rise - 0.95 EF - Propane Tankless Water Heater - Outdoor

A.O. Smith ATO-540H - 6.3 GPM at 60° F Rise - 0.95 EF - Propane Tankless Water Heater - Outdoor
Model: ATO-540H-P
$1,234.00
$1,172.30
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Ships in 3 - 4 Weeks
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Shipping times vary.
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Install Location
Fuel Type
Flow Rate at 60° Rise
 
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  • Product Description
  • Reviews
  • Product Q&A
  • Recommended Accessories
  • How-To Articles
  • Manuals
Product Description
+
Fuel
LP
Location
Outdoor
# of Showers
3.0
Energy Factor


Product Video Disclaimer: "PED is not responsible for any variances from the product in this video and the item you purchase. Please review all product specs prior to purchase."

Features
Features
    A.O. Smith continues to lead the way in residential and commercial water heating with close to 70 years of innovative hot water solutions. The ATO-540H-P is A.O. Smith's high efficiency, Ultra-Low NOx outdoor model, it keeps emissions low by featuring the latest in water heating technology. Switching on when a hot water tap is opened, a built in temperature sensor helps to maintain hot water within a one degree set point during use, and the system automatically shuts off when the tap is closed saving you energy. An on board controller gives you simple and complete control over your water heater.
  • High Efficiency Condensing Technology
  • The ATO-540H-P features the latest in water heating condensing technology. This means that the unit can deliver some of the highest efficiency standards on the market, keeping dollars in your pocket.
  • Ultra Low-POx Emissions
  • The ATO-540H-P is designed to qualify for the most stringent Low-POx standards. These standards coincide with SCAQMD rules and other air quality management districts.
  • Heavy Duty Heat Exchanger
  • The primary heat exchanger is built out of copper, offering better heat transfer than stainless steel and designed to be more resilient against corrosion. A.O. Smith water heaters are built to last and save you money in the process.
  • Multiple Safety Features
  • ATO models come with a long list of safety features standard. These include: built in freeze protection, manual reset hi limit, an overheat cutoff fuse, inlet and outlet thermistors to monitor temperatures, and a built-in flame sensor.
  • Space Saving Design
  • A.O. Smith tankless heaters take up less space than their conventional counterparts. The convenient wall mount design means they can fit in nearly any outdoor wall layout and offer additional flexibility.
Specifications
General Information
Type
Tankless Water Heater
Product Line
Residential
Medium Medium refers to the substance that carries heat through the heating system. Systems are either designed to use either Hot Water or Steam as a medium, and components are usually specific to one or the other.
Hot Water
Heat Exchanger Material
Copper/Stainless
Fuel Type To create heat, some form of fuel is required. Fuel Type specifies what the product uses as an input to create heat.
Liquid Propane
Combustion Type
Condensing
Vent Type Products that use combustion (burning) of fuel to create heat also create potentially dangerous gasses that need to be exhausted (AKA "Vented"). Depending on the product, venting can be done via a chimney, through a side wall, or use a second vent to provide fresh air to the appliance.
Outdoor (No Venting)
Storage Type
Tankless
Mount Type
Wall
Installation Location
Outdoor
UPC
671657141240
Performance
Flow Rate at 40F Temperature Rise Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location. Learn More
9.5 GPM
Flow Rate at 50F Temperature Rise Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location. Learn More
7.5 GPM
Flow Rate at 60F Temperature Rise Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location. Learn More
6.3 GPM
Flow Rate at 70F Temperature Rise Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location. Learn More
5.4 GPM
Maximum Input Capacity The Maximum Input Capacity describes how quickly the appliance will use fuel when delivering it's maximum capacity. The units may change depending on the fuel being used.
199000 BTU
Minimum Input Capacity
13000 BTU
Energy Factor Energy Factor (EF) is a measurement of water heater energy efficiency. The higher the energy factor, the more efficient the water heater. Learn More
0.95
Flow Rate at 77F Temperature Rise
4.9 GPM
Ultra Low NOx Emissions NOx is a byproduct of the combustion process, and it's output is regulated in some jurisdictions. Many regulators mirror SCAQMD rules, which regulate air quality for some parts of Southern California. Ultra Low NOx appliances emit less than 10-14 ng/J (nanogram per Joule) of NOx. Learn More
Yes
Electrical Data
Voltage
120 Volts
Phase
1
Frequency
60 Hz
Dimensions
Gas Connection Size
0.75 Inches
Cold Water Inlet
0.75 Inches
Hot Water Outlet
0.75 Inches
Product Height
23.625 Inches
Product Width
17.75 Inches
Product Depth
11.25 Inches
Product Weight
59 Pounds
Warranty Information
Parts Warranty A warranty is a safeguard from defects in manufacturing and can vary in length and terms. To see the manufacturer's warranty statement, click on the Manuals tab. Learn More
5 Years
Heat Exchanger Warranty
15 Years
Certifications
Energy Star Listed
Yes
CSA Listed
Yes
AHRI Certified
Yes
ANSI Certified
Yes
UPC Listed
Yes
NSF Listed
Yes
AHRI Reference Number
5526887
Fuel
LP
Location
Outdoor
# of Showers
3.0
Energy Factor


Product Video Disclaimer: "PED is not responsible for any variances from the product in this video and the item you purchase. Please review all product specs prior to purchase."

Features
Features
    A.O. Smith continues to lead the way in residential and commercial water heating with close to 70 years of innovative hot water solutions. The ATO-540H-P is A.O. Smith's high efficiency, Ultra-Low NOx outdoor model, it keeps emissions low by featuring the latest in water heating technology. Switching on when a hot water tap is opened, a built in temperature sensor helps to maintain hot water within a one degree set point during use, and the system automatically shuts off when the tap is closed saving you energy. An on board controller gives you simple and complete control over your water heater.
  • High Efficiency Condensing Technology
  • The ATO-540H-P features the latest in water heating condensing technology. This means that the unit can deliver some of the highest efficiency standards on the market, keeping dollars in your pocket.
  • Ultra Low-POx Emissions
  • The ATO-540H-P is designed to qualify for the most stringent Low-POx standards. These standards coincide with SCAQMD rules and other air quality management districts.
  • Heavy Duty Heat Exchanger
  • The primary heat exchanger is built out of copper, offering better heat transfer than stainless steel and designed to be more resilient against corrosion. A.O. Smith water heaters are built to last and save you money in the process.
  • Multiple Safety Features
  • ATO models come with a long list of safety features standard. These include: built in freeze protection, manual reset hi limit, an overheat cutoff fuse, inlet and outlet thermistors to monitor temperatures, and a built-in flame sensor.
  • Space Saving Design
  • A.O. Smith tankless heaters take up less space than their conventional counterparts. The convenient wall mount design means they can fit in nearly any outdoor wall layout and offer additional flexibility.
Specifications
General Information
Type
Tankless Water Heater
Product Line
Residential
Medium Medium refers to the substance that carries heat through the heating system. Systems are either designed to use either Hot Water or Steam as a medium, and components are usually specific to one or the other.
Hot Water
Heat Exchanger Material
Copper/Stainless
Fuel Type To create heat, some form of fuel is required. Fuel Type specifies what the product uses as an input to create heat.
Liquid Propane
Combustion Type
Condensing
Vent Type Products that use combustion (burning) of fuel to create heat also create potentially dangerous gasses that need to be exhausted (AKA "Vented"). Depending on the product, venting can be done via a chimney, through a side wall, or use a second vent to provide fresh air to the appliance.
Outdoor (No Venting)
Storage Type
Tankless
Mount Type
Wall
Installation Location
Outdoor
UPC
671657141240
Performance
Flow Rate at 40F Temperature Rise Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location. Learn More
9.5 GPM
Flow Rate at 50F Temperature Rise Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location. Learn More
7.5 GPM
Flow Rate at 60F Temperature Rise Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location. Learn More
6.3 GPM
Flow Rate at 70F Temperature Rise Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location. Learn More
5.4 GPM
Maximum Input Capacity The Maximum Input Capacity describes how quickly the appliance will use fuel when delivering it's maximum capacity. The units may change depending on the fuel being used.
199000 BTU
Minimum Input Capacity
13000 BTU
Energy Factor Energy Factor (EF) is a measurement of water heater energy efficiency. The higher the energy factor, the more efficient the water heater. Learn More
0.95
Flow Rate at 77F Temperature Rise
4.9 GPM
Ultra Low NOx Emissions NOx is a byproduct of the combustion process, and it's output is regulated in some jurisdictions. Many regulators mirror SCAQMD rules, which regulate air quality for some parts of Southern California. Ultra Low NOx appliances emit less than 10-14 ng/J (nanogram per Joule) of NOx. Learn More
Yes
Electrical Data
Voltage
120 Volts
Phase
1
Frequency
60 Hz
Dimensions
Gas Connection Size
0.75 Inches
Cold Water Inlet
0.75 Inches
Hot Water Outlet
0.75 Inches
Product Height
23.625 Inches
Product Width
17.75 Inches
Product Depth
11.25 Inches
Product Weight
59 Pounds
Warranty Information
Parts Warranty A warranty is a safeguard from defects in manufacturing and can vary in length and terms. To see the manufacturer's warranty statement, click on the Manuals tab. Learn More
5 Years
Heat Exchanger Warranty
15 Years
Certifications
Energy Star Listed
Yes
CSA Listed
Yes
AHRI Certified
Yes
ANSI Certified
Yes
UPC Listed
Yes
NSF Listed
Yes
AHRI Reference Number
5526887
Product Specs
+
Specifications
General Information
Type
Tankless Water Heater
Product Line
Residential
Medium Medium refers to the substance that carries heat through the heating system. Systems are either designed to use either Hot Water or Steam as a medium, and components are usually specific to one or the other.
Hot Water
Heat Exchanger Material
Copper/Stainless
Fuel Type To create heat, some form of fuel is required. Fuel Type specifies what the product uses as an input to create heat.
Liquid Propane
Combustion Type
Condensing
Vent Type Products that use combustion (burning) of fuel to create heat also create potentially dangerous gasses that need to be exhausted (AKA "Vented"). Depending on the product, venting can be done via a chimney, through a side wall, or use a second vent to provide fresh air to the appliance.
Outdoor (No Venting)
Storage Type
Tankless
Mount Type
Wall
Installation Location
Outdoor
UPC
671657141240
Performance
Flow Rate at 40F Temperature Rise Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location. Learn More
9.5 GPM
Flow Rate at 50F Temperature Rise Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location. Learn More
7.5 GPM
Flow Rate at 60F Temperature Rise Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location. Learn More
6.3 GPM
Flow Rate at 70F Temperature Rise Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location. Learn More
5.4 GPM
Maximum Input Capacity The Maximum Input Capacity describes how quickly the appliance will use fuel when delivering it's maximum capacity. The units may change depending on the fuel being used.
199000 BTU
Minimum Input Capacity
13000 BTU
Energy Factor Energy Factor (EF) is a measurement of water heater energy efficiency. The higher the energy factor, the more efficient the water heater. Learn More
0.95
Flow Rate at 77F Temperature Rise
4.9 GPM
Ultra Low NOx Emissions NOx is a byproduct of the combustion process, and it's output is regulated in some jurisdictions. Many regulators mirror SCAQMD rules, which regulate air quality for some parts of Southern California. Ultra Low NOx appliances emit less than 10-14 ng/J (nanogram per Joule) of NOx. Learn More
Yes
Electrical Data
Voltage
120 Volts
Phase
1
Frequency
60 Hz
Dimensions
Gas Connection Size
0.75 Inches
Cold Water Inlet
0.75 Inches
Hot Water Outlet
0.75 Inches
Product Height
23.625 Inches
Product Width
17.75 Inches
Product Depth
11.25 Inches
Product Weight
59 Pounds
Warranty Information
Parts Warranty A warranty is a safeguard from defects in manufacturing and can vary in length and terms. To see the manufacturer's warranty statement, click on the Manuals tab. Learn More
5 Years
Heat Exchanger Warranty
15 Years
Certifications
Energy Star Listed
Yes
CSA Listed
Yes
AHRI Certified
Yes
ANSI Certified
Yes
UPC Listed
Yes
NSF Listed
Yes
AHRI Reference Number
5526887
Reviews
+
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Product Q&A
+
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Recommended Accessories
+
How-To Articles
+
Manuals
+
 
 
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A.O. Smith ATO-540H - 6.3 GPM at 60° F Rise - 0.95 EF - Propane Tankless Water Heater - Outdoor
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