et the Sun Heat

Your Water

SRAL years ago PIM pub ihed an interesting article on very simple hot water system ig its heat from the sun. e then the CSIRO in Aus has been doing a good deal ■ther research into such hot system’s, and one to their s is now being produced jrcially, though as yet only ited numbers. unit consists of a blackened sheet to which are fixed tubes. Water circulates h the tubes to an insulated 3 tank. The copper heat er unit is faced with one or iheets of glass spaced an inch and the back of the unit is 1 with two inches of

:ing wool, fibre-glass, etc.

absorber unit’s size depends ie quantity of hot water ;d. and is calculated at one foot per gallon of water y. The unit may be installed roof, or as a sloped awning sunny side of the house, reas of plenty of sunshine a ade installation will supply omestic requirements. For ’ial purposes a circulating is also required and some nal electric or fuel-firing j may be called for.

CSIRO found that even in irne’s climate the domestic upplied 60-70 per cent, of sat required for a domestic ition. installed price in Australia, ng storage tank, is about per square foot, which is

probably a little more than the conventional types of heater. How ever, the subsequent saving is considerable, as the cost of running would be virtually nil.

Such a system should be very successful in many Island areas.