TriangleTube Product Line

Triangle Tube

Condensing Boilers


ACV Triangle Tube offers a broad range of condensing boilers for residential and commercial use. We offer wall hung and floor standing units, ranging from 85 to 1200 MBH.

Prestige Cascade System

  • Joins 2 to 5 Prestige Boilers for Maximum Inputs of 500 to 2000 MBH
  • Utilizes the Prestige heat exchanger for up to 96% AFUE
  • Multi-function rack mounts and joins boilers to provided manifolds
  • Turndown ratio of up to 18 to 1
  • Common vent available for 2 or 3 boilers
  • Hydraulic junction minimizes head loss, provides air separation, and eliminates system debris through the built-in drain
  • Available in natural gas or propane

Prestige Series

  • 95% AFUE
  • Fire Tube Heat Exchanger
  • ACVMAX Control: 60 Second EZ Set-up
  • Integrated Cascade for up to 6 Boilers
  • Widest Range of Venting Options Available
  • Exclusive “Tank-in-Tank” Technology (Excellence)
  • Easy Installation & Serviceability

Challenger Series

  • Up to 95% AFUE
  • Low Maintenance Heat Exchanger
  • Primary-Secondary Manifold with Pump Included
  • Unique Copper Waterways
  • High Efficiency in DHW Mode (combi)
  • Anti-scald Mixing Valve Included (combi)
  • Reliability Through Simplicity

HeatMaster Series

  • 95% AFUE
  • Exclusive “Tank-in-Tank” Technology
  • Total Condensing in DHW & Space Heating
  • Satisfies High Space Heating & DHW Demands
  • 60 Second EZ Set-up
  • Intelligent Troubleshooting
  • Easy Serviceability

Keystone Series

  • Stainless Steel Heat Exchanger
  • ASME Stamped Heat Exchanger
  • Thermal Efficiencies of up to 97%
  • Turndown Ratios up to 10:1
  • Compact Footprint
  • 7 Boiler Models from 399 to 1,200 MBH
  • 9 Water Heater Models from 199 to 1,200 MBH
  • Boilers 500 MBH and greater are CSD-1 Compliant
  • PVC, PP, and SS Venting up to 100’
  • Low NOx – 2012 SCAQMD Certified