Featured Products


Combi Furnace

Forced air and hot water all in one. The Game changer in the Furnace industry.

  • 97%EF | 97.1%AFUE
  • Reduced gas consumption


Gas Boilers

Max input: 190,000 BTU/H Stainless steel fire tube boiler for every home.

  • 95% AFUE
  • 10:1 turndown ratio
  • Heat only and Combi versions available in three sizes:110/150/190 MBH
  • Low loss header included (Combi)

Trinity Fire Tube

Gas Boilers

Max Input: 399,000 BTU/H Stainless steel down-fired fire tube heat exchanger.

  • Nine models to choose from
  • Field Convertible gas system
  • Venting up to 150
  • 8:1 Turndown ratio
  • Cascading capable

The Vmax

Gas Boilers

Max Input: 154,000 BTU/H Available in a Plus version with built-in indirect water heater.

  • Built-in loop and pump
  • Field Convertible gas system
  • Universal vent connections
  • Up to 10:1 Turndown ratio
  • Cascading capable

With NTI, you're buying quality, North American-made comfort

Our customer service hotline and extended warranty program maintain our commitment to you.

View The NTI Product Range

NTI is a pioneer in developing the most advanced and efficient home heating equipment.


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Product Registration

Register your NTI Product online or via PDF download.

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Warranty Information

NTI Warranty terms & conditions

Read more about NTI Warranty.

Ariston Thermo acquires controlling interest of HTP

NTI is pleased to announce that on July 31, 2017 Ariston Thermo ...

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Cleaning and gasket Kits

Cleaning and gasket kits for the Tx,Ti,Lx,Ts,Tft,Vmax, and FTV ...

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