Solar-Heated Hot Water System (Mark One)
This system uses a pair of old dairy milk heat-exchangers
(the old-fashioned type where the milk ran down the outside of the pipes,
and the cold water was pumped through the pipes themselves...)
I've rigged the panels up on the roof, enclosed in boxes with clear plastic
covers, and a thermostatically controlled pump to push the water from the
hot water cylinder through the panels and back to the cylinder again.
It works reasonably well, but we find that we have to use the electricity
booster most days, except when the sun is VERY hot in midsummer.
This system has now been replaced by another one (Mark Two), which is
described in the next section below.
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