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


Gas Boilers

FireTube Giant

  • 600-2400 MBH
  • Up to 10:1 Turndown Ratio
  • Integrated Air Filter
  • Up to 96% Thermal Efficiency

Trinity Lx

Gas Boilers

Max Input: 800,000 BTU/H Luxury features and quality.

  • Easy use touch screen display
  • Stainless steel heat exchanger
  • Floor or wall mount
  • 8:1 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.