Residential Indirect Solar Water Heaters & Systems
Indirect residential solar water heaters and systems allow the sun, through a collector, to heat fluid circulating in a closed-off solar loop which never comes in direct contact with stored water.
All drainback solar thermal systems have minimal maintenance with excellent reliability. By using gravity to drain when the pump shuts off, they protect from freezing and overheating with fewer system components. Non-pressurized systems eliminate failure-prone system components, but as an indirect system, the solar loop is protected from ever-changing water quality and aggressive water areas. Because the system is a closed loop, water, or a water and propylene glycol mix can be used as a safe and efficient heat transfer fluid.
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