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Adapt™ Condensing 199,000 BTU Tankless Water Heater with Bypass Cartridge - STHR-199M

Adapt™ Condensing 199,000 BTU Tankless Water Heater with Bypass Cartridge - STHR-199M

Adapt™ Condensing 199,000 BTU Tankless Water Heater with Bypass Cartridge - STHR-199M

Model # STHR-199M
ENERGY STAR
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State products are available through independent plumbing contractors.
Enter your city and state or zip code to find a local installer.

Product Description

The STHR-199M tankless water heater uses up to 199,000 BTUs of Natural Gas or Liquid Propane to deliver a max flow rate of 10.5 GPM. State’s ADAPT™ premium condensing gas tankless water heaters deliver robust, on-demand performance and the flexibility to install in practically any residential setting. Easily add scale prevention protection by replacing the bypass cartridge with an optional X3 cartridge sold separately — which can make the heat exchanger last up to three times longer than a standard tankless water heater while maintaining like-new performance. The ADAPT™ line features a built-in Control Display for setting and reviewing up to two recirculating schedules; as well as checking heater status and error codes. Manage temperature settings and activate the heater and recirculation remotely with optional kits (sold separately). All models are ENERGY STAR® certified and extremely efficient with a Uniform Energy Factor of 0.95 and also comply with Ultra-Low NOx regulations. All ADAPT™ models are field convertible from Natural Gas to Liquid Propane, kit included, and can be installed indoors or outdoors (with an Outdoor Vent Cap Kit sold separately). Cascade up to 12 like heaters together for larger applications requiring multiple water heaters to work in conjunction, cable included.

ENERGY STAR

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State products are available through independent plumbing contractors.
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Certifications

15

year

limited warranty

0.95

Uniform Energy Factor

CSA International Low Lead Content Certification in compliance with U.S. and Canadian safety standards on gas components
AHRI Air-Conditioning, Heating and Refrigeration Institute
CSA International Design Certification The CSA Blue Star indicates the product is certified to applicable U.S. standards for appliances using gas or other petroleum fuel
CSA International Certification in compliance with U.S. and Canadian for gas appliances and other liquid petroleum, LP, propane products
  • Emissions: Ultra-Low NOx
  • Maximum BTU/h: 199,000
  • UEF 0.95
  • Minimum BTU/h: 9,000
  • Limited Heat Exchanger Warranty: 15 Years
  • Limited Parts Warranty: 5 Years
  • Water Connection Location: Bottom
  • Water Connection Size: 3/4"
  • Heat Exchanger: Patented Stainless Steel
  • Voltage: 120
  • ENERGY STAR®: Yes
  • Digital Display: Yes
  • Technology: Condensing, X3
  • Height: 33 13/16"
  • Width: 16 1/2"
  • Depth: 16 3/32"
  • Product Weight: 104
  • Shipping Weight: 125
  • Vent Type: Power Direct Vent

Optional X3® Scale Prevention Technology

• Extends life of unit up to 3 times longer
• No annual descaling required
• No conditioning period required when using new copper pipe
• Maintains like-new performance longer
• Approved to work with the integrated recirculation pump. If no dedicated recirc line, simply install a cross-over valve kit and enjoy hot water faster. Cross-over valve kit sold separately.

Patented Single Heavy Duty Stainless Steel Heat Exchangers

Patented single heavy-duty stainless steel heat exchanger design to eliminate most internal welds and improves overall reliability. More resilient to scale buildup and corrosion

Flexibility Ease of Installation

• Universal indoor or outdoor installation; Outdoor Vent Cap Kit sold separately
• Field convertible from Natural Gas to Liquid Propane, kit included
• ½” Gas Line or larger
• Install with 2" (up to 75') or 3" (up to 150') PVC venting, CPVC, Polypropylene (Solid Core Only).  

Integrated Recirculation Pump

The integrated recirculation pump will simplify installation as you will not need to spend time and money sourcing & installing the pump and controls. Front panel controls make it simple to set your recirculation pump operation so you know you will have hot water on demand.


How long would you like to enjoy a shower?

Fairfield, Connecticut 06828

Change Location or Advanced Settings
Number of minutes you can enjoy a shower before running out of hot water. Assumes a 2.2 GPM flow rate.

Need to view or change our assumptions? Access the advanced settings.
minutes

Single
Shower Length

Number of minutes you can enjoy a shower before running out of hot water. Assumes a 2.2 GPM flow rate.

Need to view or change our assumptions? Access the advanced settings.

Close
Number of back-to-back showers you can take without running out of hot water. Assumes a 2.2 GPM flow rate and an 8 minute shower length.

Need to view or change our assumptions? Access the advanced settings.
Showers

Back to
Back

Number of back-to-back showers you can take without running out of hot water. Assumes a 2.2 GPM flow rate and an 8 minute shower length.

Need to view or change our assumptions? Access the advanced settings.

Close
Number of showers you can take at the same time without running out of hot water.Assumes a 2.2 GPM flow rate and an 8 minute shower length.

Need to view or change our assumptions? Access the advanced settings.
Showers

 At the Same Time

Number of showers you can take at the same time without running out of hot water.Assumes a 2.2 GPM flow rate and an 8 minute shower length.

Need to view or change our assumptions? Access the advanced settings.

Close
Biggest tub this water heater will fill without running out of hot water. Assumes a 5.0 GPM flow rate, and a 67% fill level.

Need to view or change our assumptions? Access the advanced settings.
gallons

Maximum Tub Size

Biggest tub this water heater will fill without running out of hot water. Assumes a 5.0 GPM flow rate, and a 67% fill level.

Need to view or change our assumptions? Access the advanced settings.

Close
Number of minutes required to fill a 55 gallon tub. Assumes a 5.0 GPM flow rate and a 67% fill level.

Need to view or change our assumptions? Access the advanced settings.
minutes

Time to Fill Tub

Number of minutes required to fill a 55 gallon tub. Assumes a 5.0 GPM flow rate and a 67% fill level.

Need to view or change our assumptions? Access the advanced settings.

Close
The estimated annual cost to operate this water heater in Fairfield, Connecticut.

Need to view or change our assumptions? Access the advanced settings.
$ Dollars

Estimated Energy Cost

The estimated annual cost to operate this water heater in Fairfield, Connecticut.

Need to view or change our assumptions? Access the advanced settings.

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Many factors affect the actual performance of a water heater. This represents our closest approximation of your likely experience with this water heater in Fairfield, Connecticut, but actual performance may vary depending on factors beyond our ability to control or estimate. To view or adjust our assumptions of the most common factors that impact this product’s performance in Fairfield, Connecticut, please view the advanced settings. *Annual Estimated energy costs are estimated calculated from the energy efficiency of each water heater, your household’s estimated hot water usage & set temperature, the average groundwater temperature for your location, and residential energy prices for your location as reported by the Department of Energy and the Energy Information Administration.

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Features and Benefits

 

How It Works

 

Installation, Maintenance & Troubleshooting Videos


Application and Installation

 

Mounting the Water Heater

 

Installing the Cartridge

 

Find the Right Water Heater

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Product Features & Options

Optional X3® Scale Prevention Technology

• Extends life of unit up to 3 times longer
• No annual descaling required
• No conditioning period required when using new copper pipe
• Maintains like-new performance longer
• Approved to work with the integrated recirculation pump. If no dedicated recirc line, simply install a cross-over valve kit and enjoy hot water faster. Cross-over valve kit sold separately.

Patented Single Heavy Duty Stainless Steel Heat Exchangers

Patented single heavy-duty stainless steel heat exchanger design to eliminate most internal welds and improves overall reliability. More resilient to scale buildup and corrosion

Flexibility Ease of Installation

• Universal indoor or outdoor installation; Outdoor Vent Cap Kit sold separately
• Field convertible from Natural Gas to Liquid Propane, kit included
• ½” Gas Line or larger
• Install with 2" (up to 75') or 3" (up to 150') PVC venting, CPVC, Polypropylene (Solid Core Only).  

Integrated Recirculation Pump

The integrated recirculation pump will simplify installation as you will not need to spend time and money sourcing & installing the pump and controls. Front panel controls make it simple to set your recirculation pump operation so you know you will have hot water on demand.


Emissions: Ultra-Low NOx
Maximum BTU/h: 199,000
UEF 0.95
Minimum BTU/h: 9,000
Limited Heat Exchanger Warranty: 15 Years
Limited Parts Warranty: 5 Years
Water Connection Location: Bottom
Water Connection Size: 3/4"
Heat Exchanger: Patented Stainless Steel
Voltage: 120
ENERGY STAR®: Yes
Digital Display: Yes
Technology: Condensing, X3
Height: 33 13/16"
Width: 16 1/2"
Depth: 16 3/32"
Product Weight: 104
Shipping Weight: 125
Vent Type: Power Direct Vent

Certifications

15

year

limited warranty

0.95

Uniform Energy Factor

CSA International Low Lead Content Certification in compliance with U.S. and Canadian safety standards on gas components
AHRI Air-Conditioning, Heating and Refrigeration Institute
CSA International Design Certification The CSA Blue Star indicates the product is certified to applicable U.S. standards for appliances using gas or other petroleum fuel
CSA International Certification in compliance with U.S. and Canadian for gas appliances and other liquid petroleum, LP, propane products
place

Where to Buy

A. O. Smith water heaters are available through your local plumbing professional.

Literature



Features and Benefits

 

How It Works

 

Installation, Maintenance & Troubleshooting Videos


Application and Installation

 

Mounting the Water Heater

 

Installing the Cartridge

 

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