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Originally Posted by Xringer
...mini-split efficiency during sunny days could be made a bit better with some PV...
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Yeah, in more ways than one.
There's an energy neutral house project in Portland called the "Rose House".
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Space-age technology is certainly at the core of the experiment. Part of the house's south-facing roof is covered with 300 square feet of solar panels that should produce 6,000 kilowatt hours a year (a typical American household spends 2,000 kilowatt hours a year on lighting alone). A special system sucks in hot air from underneath the solar panels -- it's typically heated to more than 100 degrees -- and uses it to heat water and air inside the house.
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What this is refering to is that they used a device like a minisplit to draw in the heated air from under the PV panels and split the heat output between the inside air unit (when required), and a water-heating heat exchanger.
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Regards,
-AC_Hacker