NTI – TRX120 Gas Boilers

TRX Series

The TRX is a high-efficiency, wall-hung boiler equipped with an Innovative XTRATECH® stainless steel heat exchanger with large diameter tubing. Every unit is equipped with embedded Wi-Fi connectivity so that the TRX control can easily communicate with NTI remote connectivity tools, making servicing easier.

All internal components utilize bayonet quick connectors, eliminating the need to braze or solder within the unit. Swing down control box greatly enhances serviceability, making all major components easily accessible.

Main Features

  • Models up to 96% AFUE
  • Modulating Combustion up to 11:1
  • Wi-Fi on board for remote control and monitoring
  • Integrated ECM pump and DHW diverter valve on all models
  • Small zone valve systems may not require an additional pump or a low loss header
  • Easy service access and quick component connections


Space Heating
Minimum / Maximum Input (Btu/Hr)
13,200 / 120,000
Domestic Hot Water
Minimum / Maximum Input (Btu/Hr)
DOE AFUE (%) 95
Heating capacity 111
Net AHRI Rating 97
DHW Flow Rating (at 77°F rise, gpm) N/A
Installation type Indoor, Wall Hung, Fully Condensing
Weight (lbs.) 88.6
Gas connection 3/4” Male NPT
CH connections 1” Male Sweat with Adapter
DHW connections N/A
Flue Category IV, Sealed Combustion Direct Vent, Power Vent
Minimum – Maximum Exhaust Vent Run 2” (6 – 100 feet), 3” (6 – 150 feet)
Minimum – Maximum Intake Air Pipe Run 2” (0 – 100 feet), 3” (0 – 150 feet)
Shipping Weight (lbs) 84
Power Supply 120V, 60 Hz, less than 12A