Then there is the effect that the condenser is buried in the housing,
not being hit directly by the sun. As soon as the unit kicks on (or
very soon thereafter) the interior of that housing is going to be at
the ambient air temp anyhow. The heat exchangers (radiators) will also
reach operating temperature whether the sun hits them or not.
My understanding of things, shade is cooler. However, I've seen one study
where they did one test (two houses, one in the shade) and found less than
I'd go wtih the shade, as long as it isn't blocking the air flow.
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