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Polytunnels on Balhungie Farm, Angus A polytunnel (also known as a polyhouse, hoop greenhouse or hoophouse, grow tunnel or high tunnel) is a tunnel typically made from steel and covered in polyethylene, usually semi-circular, square or elongated in shape.
[3] [4] [5] Other systems such as ground-coupled heat exchangers, thermal chimneys, thermosiphons, or "climate batteries" can also be used to take ground-stored heat and use it to help heat a greenhouse. [6] [7] Polytunnels (hoop houses): Whereas a greenhouse has a frame and is glazed with glass or stiff polycarbonate sheets, polytunnels are ...
Harvest Automation’s first product is the OmniVeyor HV-100, [4] providing automated material handling for the nursery and greenhouse market. OmniVeyor HV-100 units are designed for operation in both indoor and outdoor environments as typically seen on wholesale greenhouses, hoop houses and nurseries. The robots are intended to reduce ...
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Greenhouse structures adapted in the 1960s when wider sheets of polyethylene (polythene) film became widely available. Hoop houses were made by several companies and were also frequently made by the growers themselves. Constructed of aluminum extrusions, special galvanized steel tubing, or even just lengths of steel or PVC water pipe ...
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