Natural Gas Indoor Condensing Ultra-Low 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. 

Features:

• 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" pipe - 100'; 3/4" pipe - 500'

• The primary heat exchanger is constructed of commercial-grade copper that is more resilient to erosion.

• The 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