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5.3 East/West facing roofs
Good results can be obtained by splitting the collector array on East/West elevations but this
should only be used when it is not possible to have a mainly southerly position for the collectors.
If you are installing a split East/West system you have to double the number of the panels, e.g. 2
panels system requires 2 panels on East and 2 panels on West; each set of panels will behave as
an independent system. A split system is not suitable for every East/West facing roofs.
5.4 East/West Alternative
Another option is to oversize the collector area on the side of the roof chosen to mount the
collectors. E.g. if 2 panels would have been adequate had the roof orientation been South, then
3 collectors would be used on either the East or the West depending on which side recieved the
most sunshine.
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