Solar system for water heating can work without any maintence
work.Only thing that must be taking care of is solar fluid.In system
for water heating we use Glycol/water mixtures.During cold weather it
esential to check freezing point of your solar fluid.
It should be at least -20 celzius.In some system you can drain fluid
during winter when solar system is not in use.This winter in Europe
temperatures can be even -30 C, Glycol freezing point can measured
using Glycol Antifreeze Pocket Tester.Be aware some testers that are
used for cars antifreeze wouldnt work with Glycol fluid.
Great article! thanks for sharing.
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