Informative, enjoyable, & fast-loading
A great intro review to solar hot water. All the basics were covered in a well-paced two-part animated chart format that loaded and displayed well at the default (intermediate) screen size. The narrator does a good job setting the pace and holding ones close attention.
One suggestion: PV-powered drain-back for overtemperature protection is dismissed out-of-hand because of head pressure. Depending on the homes configuration and system design elements, the drain-back reservoir could be placed out of the sun in the attic just below the collectors, minimizing head pressure.
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