Indirect Fired Water Heater

Triangle Tube, the Original Innovator and first to bring fire tube technology to the residential market. We continue to deliver quality products to customers throughout North America.

Indirect Fired Water Heaters

Smart 316 Indirect Water Heater

Smart 316

Smart 316 Indirect Water Heater Icon

Smart 316 is upgraded to 316L stainless steel inner tank-acid pickling for increased corrosion resistance, state-of-the-art welding procedures & improved dry well testing for longer life.

  • Exclusive “Tank-in-Tank” Technology
  • Self Cleaning / Self Descaling Heat Exchanger
  • Lowest Pressure Drop in the Industry
  • 7 Sizes to Choose From
  • 2″ Polyurethane Foam Insulation
  • Continuous Hot Water
  • Limited Residential Lifetime Warranty
  • High Efficiency – Saving You Money
  • Upgraded stainless steel inter tank to 316L
  • Acid Pickling – increases corrosion resistance
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Cardinal

Cardinal *Available Now*

Smart 316 Indirect Water Heater Icon

Triangle Tube is proud to introduce its latest product innovation, the Cardinal.

  • Coil Type Indirect Water Heater
  • All Stainless Steel Construction

  • 1″ Boiler Connections

  • Top DHW Connections
    Factory Included: T&P Vavle and Drain Valve
  • Sizes Ranging from 30 to 120 Gallons
  • Acid Pickling For Increased Corrosion Resistance
  • 2″ Polyurethane Foam Insulation
  • AHRI Certified Rating and Listed
  • Peace of Mind Warranty
    Residential and Commercial

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Product Comparison

Model Storage (gal) 1st Hour Output (gal) Continuous Flow (gal/min) 10 Minute Peak Flow (gal) Boiler Output (mbh)
Smart 30 28 140 1.9 40 87
Smart 40 36 180 2.5 50 112
Smart 50 46 220 3.1 65 140
Smart 60 56 410 6 110 270