Category // 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
More Details
The Game Changer

The GF200 is a cross-breed merging of best practices from hydronics, tankless water heating and forced air heating, offering the world's most efficient Combi-Furnace. With Green-Furnace technology, the GF200 has outstanding performances and unparalleled features and is the future of hot water and heating for your home. 

Save on Installation & Operation

The GF200 is a single appliance, which means it can be installed much more quickly than conventional heating systems that can be complicated to integrate.

Green Furnace Technology

Proprietary & Exclusive software delivers optimum comfort and maximum efficiency by minimizing cycling with 10 stages of modulation to provide ultra smooth heat output to your home in all conditions. Reduced temerature swings compared to conventional furnaces provides improved comfort and reduced fuel consumption and associated greenhouse gas emissions.

To view any of the documents below please click on the link to view online or download in PDF format. If you have any queries about any of our products please contact us. Thank You.

Sales Literature - English Download
GF200 Installation & Operations Manual Download
GF200 Quick Start Guide Download
GF200 Submittal Download
Warranty Information Product Registration
Coverage Coverage Period Coverage Rate Components Covered Additional Terms and Conditions
BASIC Years 1 through 5 100% All parts(including Pressure Vessel) Click here for full terms and conditions
Years 6 through 8
Pressure Vessel only See here for full terms & conditions

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

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