Takagi TK-340X3-NEH Takagi TK-340X3-NEH Natural Gas Tankless Water Heater w/ X3 Scale Prevention, Outdoor, 8 GPM
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Takagi TK-340X3-NEH Natural Gas Tankless Water Heater w/ X3 Scale Prevention, Outdoor, 8 GPM

SKU: 913376
$ 1,469.23 / ea
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Save 26% · Retail: $1,988.00

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About the Takagi TK-340X3-NEH Natural Gas Tankless Water Heater w/ X3 Scale Prevention, Outdoor, 8 GPM

Upgrade your home with a versatile and efficient tankless water heater!


The Takagi TK-340X3-NEH natural gas tankless water heater features a field convertible from natural gas to propane, making it adaptable to changes in fuel availability. It has safety features such as built-in freeze protection, an overheat cut-off fuse, an air-fuel ratio rod, and a flame sensor, ensuring the water remains above freezing point and that gas is only released and burned when a steady flame is present. This water heater includes inlet and outlet thermistors for constant temperature monitoring and a manual reset hi-limit up to 194°F, making sure that the hot water supplied to faucets or appliances remains within a safe and comfortable range.


This Takagi TK-340X3-NEH tankless water heater complies with SCAQMD rule 1146.2 and air quality management, resulting in reduced air pollution and cleaner air in the region where the water heater is installed. It has a flow rate of 10 GPM, ensuring its efficiency. Moreover, taking care of your tankless water heater through flushing is essential so it can prevent clogs and blockages in the water lines and can add to its longer life expectancy. The water heater features a concentric vent design, which simplifies the installation process by requiring only one penetration through the wall or roof.


Takagi has created advanced hot water systems and produces excellent tankless water heaters. Purchase this Takagi TK-340X3-NEH water heater and learn how to flush it by visiting How to Flush a Tankless Water Heater here at PlumbersStock!


Manufacturer: Takagi
Product: Water Heater
Water Heater Type: Tankless
Modus Operandi: Natural Gas
Type: Condensing
Electrical Voltage: 120 VAC
Energy Factor (EF): 0.94 UEF
Water Heater Features: X3 Scale Prevention Technology
BTU Rate: 180,000 BTU
Flow Rate: 8 GPM
Capacity: On Demand
Connection Size: 3/4"
Connection Type: NPT
Vent Type: Direct Vent
Vent Size: 3" or 4"
Shape: Rectangle
Height: 23-5/8"
Width: 17-3/4"
Depth: 11-1/4"
Pressure Rating: 150 PSI
Mount Type: Wall Mount
Other Info: CSA Certified
  IAPMO Certified
  AHRI certified
Mpn # TK-340X3-NEH
Shipping Dimensions 22.0" x 17.0" x 37.0"
Weight 71.00 lbs.
Shipping Dimensional Weight 78.46 lbs.
  • Transform Your Daily Comfort: This water heater features a copper heat exchanger that is 25 times better than stainless steel and quickly settles the water temperature.
  • Pure Confidence in Every Drop: It complies with lead-free standards, ensuring that the hot water used for bathing, cooking, and other purposes is free from harmful lead contamination and promoting your well-being.
  • Versatile Performance for Every Setting: You can use this water heater in residential and commercial applications, providing flexibility in installation.
  • Peace of Mind in Every Drop: This water heater includes safety features such as built-in freeze protection, manual reset hi-limit, overheat cutoff fuse, air-fuel ratio rod, and flame sensor, reducing the risk of accidents and ensuring safe operation.
  • Unleash Hot Water Freedom: This water heater has a 10 GPM flow rate, allowing for the simultaneous use of multiple hot water appliances without a drop in water pressure or temperature.
  • Effortless Water Temperature Management! This water heater includes a remote control, allowing you to start or stop heating water without physically being near the unit.

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