Takagi TK-240X3-NIH Takagi TK-240X3-NIH Natural Gas Tankless Water Heater w/ X3 Scale Prevention Technology,  Indoor, 6.6 GPM
View 2 of Takagi TK-240X3-NIH Takagi TK-240X3-NIH Natural Gas Tankless Water Heater w/ X3 Scale Prevention Technology,  Indoor, 6.6 GPM
View 3 of Takagi TK-240X3-NIH Takagi TK-240X3-NIH Natural Gas Tankless Water Heater w/ X3 Scale Prevention Technology,  Indoor, 6.6 GPM

Takagi TK-240X3-NIH Natural Gas Tankless Water Heater w/ X3 Scale Prevention Technology, Indoor, 6.6 GPM

SKU: 913368
$ 1,338.46 / ea
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About the Takagi TK-240X3-NIH Natural Gas Tankless Water Heater w/ X3 Scale Prevention Technology, Indoor, 6.6 GPM

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


The Takagi TK-240X3-NIH 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-240X3-NIH 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 8 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-240X3-NIH 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 Volt
Energy Star Rated: Yes
Energy Factor (EF): 0.94 UEF
Water Heater Features: Ultra-Low Nox
BTU Rate: 160,000 BTU
Capacity: On Demand
Flow Rate: 6.6 GPM
Connection Size: 3/4"
Connection Type: NPT
Installation Location: Indoor
Shape: Rectangle
Height: 23-5/8"
Width: 17-3/4"
Depth: 11-1/4"
Vent Type: Direct Vent
Vent Size: 3" or 4"
Pressure Rating: 150 PSI
Mount Type: Wall Mount
Other Info: CSA Certified
  IAPMO Certified
  AHRI certified
Mpn # TK-240X3-NIH
Shipping Dimensions 22.0" x 17.0" x 37.0"
Weight 72.00 lbs.
Shipping Dimensional Weight 78.46 lbs.
  • X3 SCALE PREVENTION TECHNOLOGY: This water heater is one of the first tankless products that maintains “like-new” performance without requiring any scale-related maintenance. It is also approved to work with an external recirculation pump and cross-over valve
  • ENERGY STAR QUALIFIED: Because this tankless water heater only activates when hot water is being used, no standby energy losses are made, providing efficient heating while conserving energy
  • DURABLE HEAT EXCHANGER: Built with a commercial-grade copper alloy and utilizing stainless steel and drums that are 25% thicker, this tank maintains a fine grain, high strength, and a lesser strain in extreme environments such as heat, acidic condensation, and chloride
  • COMPACT SIZE: This water heater takes up much less space than your conventional tank-type water heater. Its wall-mount design offers flexible installations, freeing up valuable storage space
  • POWER DIRECT VENT DESIGN: Provides flexible venting with PVC, CPVC, polypropylene, or ABS Pipe for intake and exhaust. Category III or IV venting can also be used
  • "PEACE OF MIND" LIMITED WARRANTY: No Exclusions For Hard Water and Scale-Related Failures are Covered
  • SAFETY FEATURES: Includes freeze, overheat, surge protection, and troubleshooting diagnostic codes
  • WATER PRESSURE: 15-150 PSI Water Pressure and 40 PSI or Above for Maximum Flow

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