NTI – TX151 Heat Only Gas 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 power18.9 – 151 MBH
Heating capacity139 MBH
Net AHRI rating120 MBH
Installation typeIndoor Wall Hung (rack available for floor standing installation)
Weight87 lb
Gas connection1⁄2 in NPT female
Water connection1 in NPT male
Air inlet2 in (max 100 ft), 3 in (max 150 ft)
Flue2 in (max 100 ft), 3 in (max 150 ft)