Thermosiphon Free Flow System

Sku#: FF-SYS

Item Information

The Free Flow Series is a thermosyphon system. As a self contained solar water heating system, the Free Flow Systems have collector(s) positioned lower than the tank(s) and operate on the principle of natural convection.

As the sun heats the water in the collector, it expands slightly and becomes lighter, causing the water to rise into the tank in the same way that a balloon rises in the air. The colder, heavier, water in the tank then sinks into the collector. These events create a continuous natural circulation.

  • Thermosyphon systems are widely accepted throughout the world today. They are automatic, simple, and reliable.
  • Thermosyphon Systems do not require a pump or control.
  • There are no moving parts which allows for minimal, if any, maintenance concerns.

Pre-Engineered Thermosiphon Free Flow Systems

DB System Part Number Storage Tank Collector(s)
FF-40-18 40 gallon one AE-18 Collector
FF-50-20 50 gallon one AE-20 Collector
FF-50-26 50 gallon one AE-26 Collector
FF-80-36 80 gallon two AE-18 Collectors
FF-80-40 80 gallon two AE-20 Collectors

All Kits Contain:

Part Number Description
FF-5K34 Tank Kit, with 3/4" fittings, 12 ft of soft copper tubing, and tank straps
FF-40G or FF-50G or FF-80G Horizontal tank for natural convection
FF-TS2224 or FF-TS2224FM Tilt Mount Tank Stand, 15° or Flush Mount Tank Stand

Suggested Components:

Part Number Description
FF-EK40GL FF-40G Tank 2500W Electrical Kit
FF-EK50GL FF-50G Tank 2500W Electrical Kit
FF-EK80GL FF-80G Tank 3500W Electrical Kit