Features:

• Easy retrofitting to existing systems
• Suitable for single and multiple solar heating application systems
• Preferred option for extremely cold areas and questionable water
• Incoming potable water is routed to solar storage tank
• Porcelain enamel or SUS304 stainless steel storage tank with electrical or gas back up
• Double-walled copper coil heat exchange in storage tank prevent contamination of household water
• Active, closed-loop system, incoming potable water is routed to solar storage tank, but never into collectors
• Water and antifreeze mixture circulates from collectors through coil of pipe in solar tank then is pumped back through collectors
• Potable water is warmed by heat transfer through contact with pipe
• Most climates 50/50 propylene glycol and water mixture will keep collectors from freezing
• Systems require an expansion tank and few other auxiliary components for filling venting and maintaining the system
• Definite advantage to antifreeze systems is that collector can be mounted anywhere
• Systems are pretty much only choice in very cold climates
• When there is not enough energy for sun, an electrical or gas back p element will be automatically switched on by controller
• Simple installation, no maintenance and effective operation