NTI – VM153 Gas Boilers

NTI Boilers

Vmax Series

The Vmax Series is equipped with a high-performance down-fired fire tube stainless steel heat exchanger and has been designed to make installation, setup, and service easy.

The dedicated indirect tank connections and integrated primary loop pump make the Vmax Series unique in the boiler industry, setting a new standard in terms of ease of installation and peace of mind. Integrated and smart solutions that ensure quick and effective installation, even for complex applications.

Main Features

  • Built-in primary loop and circulating pump
  • High performance fire tube stainless steel heat exchanger
  • Vents in PVC, CPVC or Poly Propylene
  • Dedicated indirect tank connections
  • Universal vent connections with embedded test port
  • Easy to program display
  • Quick connect components


Input power15.4 – 154 MBH
Heating capacity141 MBH
Net AHRI Rating122 MBH
Installation typeIndoor Wall Hung (rack available for floor standing installation)
Weight135 lb
Gas connection1⁄2 in NPT female
Water connection1 in NPT male
Air Inlet3 in (max 150 ft)
Flue3 in (max 150 ft)