P.O. Box 563
East Longmeadow, MA 01028
(Toll Free) 800-253-2133 or 888-HEC-CORP
The Hampden Model H-HYD-1A Solar Hydronics Trainer contains the plumbing components typically found on most active solar-heated circulating hot water heating systems. It includes both the storage (open) loop and the exchange (closed) loop.
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