NTI – TX151C Gas Combi Boilers

NTI Boilers

Tx Series

The Tx high-efficiency stainless steel heating boiler is easy to install and maintain, and has proven reliability by the most used and tested technology worldwide. The user-friendly programmable display, fully packaged and wired assembly, and easy to clean heat exchanger make this unit a popular choice for homeowners and contractors.

Main Features

  • Easy to program display
  • Easy to clean stainless-steel heat exchanger
  • Quick connect components
  • Universal vent connections with embedded test port
  • Vents in PVC, CPVC or Poly Propylene


Input power, DHW18.9 – 151 MBH
Input power, Heating18.9 – 80 MBH
Heating capacity74 MBH
Net AHRI Rating64 MBH
DHW Flow Rate at 77°F T Rise3.5 GPM
Installation typeIndoor Wall Hung (rack available for floor standing installation)
Weight98 lb
Gas connection1⁄2 in NPT female
Water connections1 in female (sweat joint)
DHW connections3⁄4 in NPT male
Air Inlet2 in (max 100 ft), 3 in (max 150 ft)
Flue2 in (max 100 ft), 3 in (max 150 ft)