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Heat-Flo Double Heat Exchanger
Indirect Storage Hot Water Tank Tech and Specs
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The Heat-Flo stainless steel indirect water heater is ideal for use with any hydronic, radiant heat
and solar heating system.
Our dual-coil domestic hot water storage tanks are made in 60, 80 and 115 gallon units. The lower heat
exchanger coil can be connected to solar collectors, and the upper heat exchanger coil can be connected
to a hot water boiler for backup. The units are provided with the two heating coils and two 3/8" ID
thermal wells to control each coil independently.
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HF-60D
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HF-80D
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HF-115D
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Capacity (gal)
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60
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80
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115
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Min Boiler Water Flow Through Coil (gpm)
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10
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10
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10
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Pressure Drop Through Coil (in feet)
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3.5
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3.6
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3.9
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Top Coil Heating Surface (sq.feet)
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7.4
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7.4
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7.4
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Bottom Coil Heating Surface (sq.feet)
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8.3
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8.3
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8.7
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Max Working Pressure (psi feet)
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150 psi
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150 psi
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150 psi
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Output (gal) *
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Top Coil Max Recovery (Gal/hour)
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185
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180
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190
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Bottom Coil Max Recovery (Gal/hour)
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214
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214
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214
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Connections (inch)
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Domestic - NPT
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1"
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1"
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1"
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Dimensions (inch)
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Diameter
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22.5
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26.5
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26.5
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Height
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60.0
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54.0
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72.0
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Shipping Weight (lbs)
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165
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175
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205
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* Based on a 180 degree boiler water supply and a 50 degree cold water input.
Heat-Flo Double Heat Exchanger Indirect Tanks Features and Benefits:
- 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” of insulation, less than 1°/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
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Heat-Flo Double Heat Exchanger
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