High tunnels do not rely on as much energy inputs as traditional greenhouses with furnaces and forced-air ventilation. Growers and researchers are finding many innovative ways to utilize these structures to supplement or, in some cases, replace greenhouses.
By definition, the high tunnel is a walk-in, hoop- or Gothic-shaped pipe frame structure that is covered with a single layer of film plastic. It generally does not have electricity, and the only heat is provided by the sun. Ventilation is created by rolling up the sidewalls or end walls and opening the doors. Irrigation water is provided by piping from another building. Plant production can be in the soil or in containers on top of a weed mat. Multi-bay tunnels are also available.
For more information: High Tunnels-Low Cost Seasonal Growing Space.
Contributor: Vern Grubinger, University of Vermont
