• Heat-Flo 316 Stainless Steel Dual Coil Indirect Water Heater Tank - 80 Gallon - HF-80-D-SP

    - Double Heat Exchanger - One set of 3/4 in side ports and 3/4 in drain

    Product ID • HTFL80DSPECI

  • $2,699.00
  • Quantity:
  • Estimated Overland Truck Shipping Truck Shipping


The Heat-Flo stainless steel indirect water heater HF-80-D is ideal for use with any hydronic heating system, radiant heat system or Solar Hot Water Heating system where you have two heating sources. Generally, the bottom heat exchanger is where you pipe to the primary heat source and the top heat exchanger the back-up heat source. The Heat Flo HF-80-D-SP comes with 2 extra Side Ports - both 3/4 Inch. You can use 1 for an additional feed and drain.

The high quality of the design and fabrication of these complete stainless steel heaters ensure efficient, maintenance-free operation and continuous supply of hot water. These rugged units are designed for heating large volumes of domestic or process water for residential, commercial or industrial applications. If you are looking for a lot of hot water, that is much faster and a lot cheaper, the Heat-Flo indirect water heater is the answer.

What is an indirect water heater? An indirect is a storage tank with a heating coil built inside the tank. Hot water from any hydronic heating boiler is circulated through the coil inside to heat all the water in the tank. The unit is piped like any other heating zone.


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Technical Specs

Heat-Flo 316 Stainless Steel Indirect Water Heater Tank HF-80-SP Techs and Specs

  • Capacity Gallons
  • Heat Exchangers
    Upper and Lower
  • Min Boiler Water Flow Through Coil (gpm)
  • Pressure Drop Through Coil (in feet)
  • Upper Coil Heating Surface (sq.feet)
  • Lower Coil Heating Surface (sq.feet)
  • Max Working Pressure (psi feet)
    150 PSI
  • Upper Coil Recovery (Gallons *)
  • LowerCoil Recovery(Gallons *)
  • Max Hot Water Outlet Temperature
    150 Degrees
  • Connection Domestic NPT
    3/4 Inch
  • Connection Boiler NPT
    1 Inch
  • Extra Side Ports Qty
  • Extra Side Ports Size NPT
    3/4 Inch
  • Thermal Wells
    Qty 2 at 3/8 Inch for Upper and Lower Heat Exchanger
  • Diamter Size
    28 Inches
  • Height
    59 Inches
  • Shipping Weight
    175 Pounds
  • * Based on a 200 degree boiler water supply and a 50 degree cold water input. For 180 degree F boiler water supply multiply by ratings by 0.86

Heat-Flo 316 Stainless Steel Indirect Water Heater Tank HF-80-SP Features

  • Tanks and coils are all stainless steel construction
  • Large smooth wall coils deliver full output for years. No finned tubing to collect lime and sediment
  • Includes over 2 Inches of insulation, less than 1 Degree /hr. heat loss, and a flexible thermoplastic jacket that will not dent or corrode
  • All connections are on top for a neat, clean installation
  • Brass drain and relief valves are factory installed
  • Honeywell 4006 aquastat control is standard
  • Limited lifetime warranty residential installations 5 years commercial
  • Made in the USA

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