AO Smith ATO540HN Tankless Water Heater Condensing Ultra-Low NOx Outdoor 199,000 BTU Natural Gas

Item#: ATO540HN

Brand: AO Smith

Free Shipping Sold by: waterheatingsystem.com

Seller Seller Ratings Info Go to Store
www.minisplitairconditionerunit.com Trusted Seller In Stock New Go to Store
www.greeairconditioners.com Trusted Seller In Stock New Go to Store
www.12000btuairconditioner.com Trusted Seller In Stock New Go to Store
www.windowairconditionerheater.com Trusted Seller In Stock New Go to Store
www.carrieracsale.com Trusted Seller In Stock New Go to Store

Note: Your submitted review is subject to the license terms set out in our Terms of Use. By submitting your review, you acknowledge that you have the authority to do so and that your review does not violate another party's copyright or intellectual property rights

Product Details
 

The 540H is well suited for residential/commercial applications such as small restaurants and beauty salons. Utilizing HRS35 copper alloy for the heat exchanger tubing, the 540H is also suitable for heavier-residential usages such as space heating or domestic recirculation systems. Remote control included as a standard feature. Indoor models are certified up to 10,100 ft. altitude. Thicker heat exchanger drum and utilizes HRS35 (heat-resistant) copper for the heat exchanger tubing. Provides a variety of installation options: outdoor and direct vent. Includes a pump control port, ensuring efficient operation of all circulation pumps. Complies with Ultra-Low NOx regulations and meets the energy efficiency requirements of ASHRAE 90.1b-1992. Easy-Link System capable up to 4 units. Multi-Link System capable up to 20 units.

The ATO-540H-N tankless water heater uses up to 199,000 BTUs of natural gas to deliver a max flow rate of 10 GPM. It utilizes condensing technology to achieve an Energy Factor of 0.95, and is ENERGY STAR® qualified. This model meets Ultra-Low NOx emission requirements, and comes with a 15-year limited warranty.

How it Works

The comprehensive line of A. O. Smith tankless water heaters provide hot water on-demand.

• A hot water tap is opened 
• The opened tap allows water to flow through the water heater. An internal water flow sensor detects this flow 
• Upon flow detection, the flow sensor sends the activation signal to the computer board 
• The computer automatically ignites the burner 
• As water flows through the heat exchanger, it absorbs heat from the burner 
• By the time the water exits the heater, it has reached the designated set temperature 
• When the hot water tap is closed, the water heater automatically turns off

Product Specifications

Tech Specs
Emissions: Ultra-Low NOx
Maximum BTUs: 199,000
Minimum BTUs: 15,000
Limited Heat Exchanger Warranty: 15 Years
Limited Parts Warranty: 5 Years
Water Connection Location: Bottom
Water Connection Size: 3/4"
Heat Exchanger: HRS35 Copper Alloy
Secondary Heat Exchanger: Stainless Steel
Voltage: 120
Energy Factor: 0.95
ENERGY STAR®: Yes
Remote Control: Yes
Technology: Condensing


Dimensions & Venting
Type: Space Saving
Height: 23 5/8"
Width: 17 3/4"
Depth: 11 1/4"
Product Weight: 59lbs/27kg
Shipping Weight: 63lbs
Vent Material: PVC, CPVC, PP, ABS, SS


Product Features & Options

Dual Heat Exchanger

The primary heat exchanger is constructed of commercial-grade HRS35 copper, which is stronger than standard copper and more resilient against erosion. Condensing models feature 316L stainless steel secondary heat exchanger, providing additional protection against corrosion.

Space Savings

A. O. Smith tankless water heaters take up much less space that your conventional tank-style water heater. With no tank to steal valuable storage space, our wall-mount design allows for additional storage and flexibility.


 

 

Safety Features

Includes freeze, overheat, surge protection and troubleshooting diagnostic codes.

 

Endless Hot Water

The comprehensive line of A. O. Smith tankless water heaters are an excellent whole-home water heating solution that supply endless hot water.