TK-540P-NIH Takagi 199,000 BTU Natural Gas Indoor Condensing Ultra-Low NOx Tankless Water Heater
TK-540P-NIH series integrates a recirculation pump to provide instant hot water in residential applications with dedicated recirculation lines. The pump is easily controlled with a simple user interface and multiple pump settings allow you to customize pump operation to meet your needs while maximizing heater efficiency.
ENERGY STAR qualified
15-year limited Heat Exchanger Warranty, 5-year parts warranty, 1-year labor warranty for Residential applications
6-year limited Heat Exchanger Warranty, 5-year parts warranty, 1-year labor warranty for Commercial applications
Integrated Recirculation Pump - 1/2 in pipe - 100 ft; 3/4 in pipe - 500 ft
Primary heat exchanger is constructed of a commercial grade copper that is more resilient to erosion.
Secondary heat exchanger is made of type 316L stainless steel to protect against corrosion.
Complies with SCAQMD 1146.2 Ultra-Low NOx regulations of less than 14 ng/J (<20ppm)
Easy-Link with up to three other T-H3 units to increase flow capacity
Common Vent up to 8 units
Condensing Indoor model
Safety features include Air-Fuel ratio (AFR) sensor, freeze protection, overheat cut-off fuse, exhaust & water temperature safety control, and troubleshooting diagnostic codes