There’s a type of heater setup that delivers heat right where you need it and can offer some important advantages over forced air heat, but we don’t see many of them in the field. We think lack of knowledge about the technogy is the limiting factor, and it turns out there is also some customization involved, so we got ahold of John Wells at Rimol Greenhouse Systems to break it down for us. The tech we’re talking about is called convection tube heating, and it has as much to do with how the heat is delivered as the specs of the heater itself.
The big difference from most heaters is that hot air goes into a plenum (like a manifold) that channels the hot air into multiple separate ducts that are attached to big, perforated plastic tubes that distribute the heat evenly through the greenhouse. The tubes typically run down pathways, and in vining crops they have the advantage of heating the air at the base of the plant, where disease tends to start, and rises from there warming the whole plant. In winter greens crops, it means growers can run the tubes under row cover and only heat the area under cover- meaning you only need to heat the fraction of the greenhouse where your crop is. Listen to this episode to learn about the specs needed to run such a system- plus best practices for cooling the greenhouse with shade cloth.
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Website: rimol.com
Instagram: @rimolgreenhouse
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