Detailed Product Description

An indirect system, also known as Closed Loop, a simple pump moves the antifreeze solution through a loop into the solar collector, through the collectors pipes, and out of the solar collector. Then, the sun-warmed antifreeze solution flows into a heat-transfer unit where it warms the cool water heading into a conventional hot water tank. The antifreeze solution then returns to the pump and again flows into the solar collector without ever mixing with the buildings water.

The Closed Loop Solar Heating Systems with the glycol-water solution are ideal for areas with questionable water quality and the preferred option for extremely cold temperatures over a prolonged period. While the antifreeze mixture is more expensive than using water as a heat-transfer fluid, it provides the solar water heater with excellent freeze protection.