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Solar Water Heater Pressurized Glycol Systems 101

In this active, closed-loop system, incoming potable water is routed tothe solar storage tank, but never into the collectors. A water andantifreeze mixture circulates from the collectors through a coil ofpipe in the solar tank, and then is pumped back through the collectors.(In most climates, a 50/50 propylene glycol and water mixture will keepcollectors from [...]

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