The TK-240X3-NIH is well suited for residential applications. Takagi has combined water heating and treatment in a product designed to revolutionize tankless water heating. Our new condensing gas tankless line features X3® Scale Prevention Technology to last three times longer than other tankless models without X3® Technology. Complies with Ultra-Low NOx regulations. The TK-240X3-NIH utilizes commercial-grade copper alloy for the heat exchanger tubing and are approved to work with an external recirculation pump and cross-over valve. Certified up to 10,100 ft. altitude.

• X3® Scale Prevention Technology
• 15-year limited Heat Exchanger Warranty, 5-year parts warranty, 1-year labor warranty for Residential applications
• Commercial-Grade Copper Heat Exchanger
• Approved to work with an external recirculation pump and cross-over valve
• Complies with Ultra-Low NOx regulations of less than 14 ng/J (<20ppm)
• Condensing Natural Gas Indoor model
• Safety features include freeze, overheat, surge protection, and troubleshooting diagnostic codes

Emissions: Ultra-Low NOx

Maximum BTUs: 160,000

Minimum BTUs: 15,000

Water Connection Location: Bottom

Water Connection: 3/4"

Flow Rate: 6.60

Heat Exchanger: Commercial Grade Copper

Voltage: AC 120V

UEF: 0.94

ENERGY STAR® Qualified: No

LEED Rating: 1.5

Remote Control: No

Technology: Condensing

Multilink: No

Height: 23.63"

Width: 17.75"

Depth: 11.25"

Product Weight: 73 lbs.

Vent Type: Direct Vent

Vent Size: 3 or 4"