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Tankless Water Heater Condensing Ultra-Low NOx Indoor 199,000 BTU Natural Gas

Tankless Water Heater Condensing Ultra-Low NOx Indoor 199,000 BTU Natural Gas

Tankless Water Heater Condensing Ultra-Low NOx Indoor 199,000 BTU Natural Gas

Model # GTS-540-NIH
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, 02139

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Product Description

The 540 series is well suited for residential use. Utilizing commercial grade copper alloy for the heat exchanger tubing, the 540 series is also suitable for heavier-residential usages such as domestic recirculation systems. Remote control included as a standard feature on all Outdoor models. Indoor models are certified up to 10,100 ft. altitude. Provides a variety of installation options: outdoor and direct vent. Complies with Ultra-Low NOx regulations and meets the energy efficiency requirements. Easy-Link System capable up to 4 units.

The GTS-540-NIH tankless water heater uses up to 199,000 BTU/hr of natural gas to deliver an endless supply of hot water for a 3 bath home in northern climates and up to a 4 bath home in southern climates (one shower head per bath). Utilizing condensing technology, this heater is extremely efficient with a Uniform Energy Factor of 0.93. With an industry leading 15-year limited warranty, the GTS-540-PIH tankless water heater provides years of hot water through innovation and quality.

Where to Buy

Showing results for 02139
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MacCormack Plumbing
Billerica, MA 01821
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MacCormack Plumbing
Billerica, MA 01821-1029
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All Clear Inc.
Somerville, MA 02143-1723
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Certifications

15

year

limited warranty

0.93

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
NSF Certified
  • Emissions: Ultra-Low NOx
  • Maximum BTU/h: 199,000
  • UEF 0.93
  • Minimum BTU/h: 15,000
  • Limited Heat Exchanger Warranty: 15 Years
  • Limited Parts Warranty: 5 Years
  • Water Connection Location: Bottom
  • Water Connection Size: 3/4"
  • Heat Exchanger: Commercial-Grade Copper
  • Secondary Heat Exchanger: Stainless Steel
  • Voltage: 120
  • LEED Points: 1.5
  • Digital Display: Yes
  • Technology: Condensing
  • Height: 23 5/8"
  • Width: 17 3/4"
  • Depth: 11 1/4"
  • Product Weight: 59 lbs/27 kg
  • Shipping Weight: 70.9
  • Vent Type: Direct Vent
  • Vent Length: 70 feet at 3 diameter
    100 feet at 4 diameter
  • Vent Material: PVC, CPVC, PP, ABS, SS

Dual Heat Exchanger

The primary heat exchanger is constructed of commercial-grade 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.

Safety Features

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

Space Savings

State 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.

Endless Hot Water

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


How long would you like to enjoy a shower?

Cambridge, Massachusetts 02139

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.

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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.

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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.

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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.

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Close
The estimated annual cost to operate this water heater in Cambridge, Massachusetts.

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 Cambridge, Massachusetts.

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

Close

Many factors affect the actual performance of a water heater. This represents our closest approximation of your likely experience with this water heater in Cambridge, Massachusetts, 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 Cambridge, Massachusetts, 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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Product Features & Options

Dual Heat Exchanger

The primary heat exchanger is constructed of commercial-grade 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.

Safety Features

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

Space Savings

State 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.

Endless Hot Water

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


Emissions: Ultra-Low NOx
Maximum BTU/h: 199,000
UEF 0.93
Minimum BTU/h: 15,000
Limited Heat Exchanger Warranty: 15 Years
Limited Parts Warranty: 5 Years
Water Connection Location: Bottom
Water Connection Size: 3/4"
Heat Exchanger: Commercial-Grade Copper
Secondary Heat Exchanger: Stainless Steel
Voltage: 120
LEED Points: 1.5
Digital Display: Yes
Technology: Condensing
Height: 23 5/8"
Width: 17 3/4"
Depth: 11 1/4"
Product Weight: 59 lbs/27 kg
Shipping Weight: 70.9
Vent Type: Direct Vent
Vent Length: 70 feet at 3 diameter
100 feet at 4 diameter
Vent Material: PVC, CPVC, PP, ABS, SS

Certifications

15

year

limited warranty

0.93

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
NSF Certified
place

Where to Buy

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

Literature

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