AO Smith TK-540X3-NIH 199,000 BTU Natural Gas Indoor Condensing Ultra-Low NOx w/X3 Technology Tankless Water Heater

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One or more weeks to deliver. Call or chat to inquire about the availability of this product.

Additional Shipping Charge - Due to size and weight, this item requires an added freight charge of $400.00.

Model: AOSTK-540X3-NIH

UPC: 671657270346

Finish: None

TK-540X3-NIH AO Smith 199,000 BTU Natural Gas Indoor Condensing Ultra-Low NOx w/X3 Technology Tankless Water Heater

ENERGY STAR® qualified
X3® Scale Prevention Technology
15-year limited Heat Exchanger Warranty, 5-year parts warranty, 1-year labor warranty for Residential applications
Commercia-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

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