The candidates for our water heating solar collectors comparison are mounted in place and ready for their days in the sun. Shown from left to right are the Suntree Solar, the SolaRoll, the BTU Bucket, the unknown /and subsequently eliminated/ commercial panel, MOTHER EARTH NEWS' single-plate in-line and our double-plate in-line (both copper-equipped).
PHOTO: MOTHER EARTH NEWS STAFF
The water to "feed" the entire collector lineup was drawn from a 55-gallon drum by five pumps, and then returned to the top of the reservoir through valves.
MOTHER EARTH NEWS STAFF