Evosolar: Solar Water Heater Closed Loop Pumps
Used for providing freeze protection, the Evosolar: solar water heater closed loop pumps transfer water from the collection tank to the drain back tanks. The system is not limited to non-freezing climates giving it a wide range of locations it can be implemented. The closed loop pumps can be switched between heat exchangers to service multiple applications and are popular for spas, pools, and floors. The antifreeze may need to be recharged on a 3 to 5 year time schedule.