This single span tunnel greenhouse uses hot dip galvanized steel hoops and a PE film cover, with an exhaust fan and cooling pad set at the ends. The fan pulls air through the tunnel and the pad drops its temperature on the way in, so the crop stays in range through hot days. The single bay keeps the build simple and the cost low, and the film diffuses light across the row. It suits strawberry and vegetable growing on open ground.
This single span tunnel greenhouse covers one bay of open ground with a PE film cover on hot dip galvanized steel hoops. A single bay keeps the build simple: fewer posts, less steel and a lower cost per square metre than a wider house. An exhaust fan and cooling pad are set at the gable ends, so air is drawn through and its temperature drops on the way in. drops its temperature on the way in. Spans run from 8m to 12m and total height from 3m to 8m, with length set to the site.
The frame uses hot dip galvanized steel pipe and hoops. The zinc coating protects the steel in the humid air of a working greenhouse, which keeps the structure sound through years of service. The hoops are braced with purlins and cross ties, and the whole frame is assembled from bolted sections on site.
The covering is a PE film. It holds warmth, diffuses daylight across the row and costs far less than glass or rigid sheet. The exhaust fan at one gable end draws air out, and the cooling pad at the other lets air in and drops its temperature as it passes through, so the tunnel can run through a hot summer without shading the crop.
| Structure material | Hot dip galvanized steel pipe |
| Covering material | PE film |
| Roof shape | Arch roof, single span |
| Span | 8m / 9m / 10m / 11m / 12m |
| Length | 10m to 100m, or to client demand |
| Total height | 3m to 8m |
| Cooling | Exhaust fan and cooling pad at the gable ends |
| Service life | 15 to 20 years for the frame under normal growing conditions |
| Applications | Strawberry, vegetable, fruit and flowers |
A single span tunnel is the simple form of a film house. One bay means fewer posts inside, less steel in the frame and a lower cost per square metre, which is why it is common for strawberry and vegetable growing on open ground. The arched roof sheds rain and snow, and the film can be replaced without touching the frame. FAO notes that protected cultivation of this kind extends the growing season and raises yield per square metre in many climates.
The exhaust fan at one end of the tunnel draws air out of the house. Fresh air enters through the cooling pad at the other end and drops in temperature as it passes through the wet pad. That flow gives a steady temperature along the row rather than a hot spot near the middle, which matters for a crop grown close to the film. HortiDaily covers how commercial growers plan this type of structure.
The frame ships as a knockdown kit of galvanized pipe and hoops, and the film is supplied in rolls. Assembly follows a set sequence: set the foundation, raise the hoops and purlins, then tension the film over the frame. Our engineers can travel to site to guide installation when required.
Routine work is limited. Check the film tension after storm season, service the fan and clean the cooling pad before the hot months, and inspect the pipe joints for movement. The galvanized frame is rated for 15 to 20 years under normal growing conditions.
This single span tunnel greenhouse suits strawberry and vegetable production, fruit and flower growing and general farm cover work. Because span, length and height are all set to demand, the same frame system fits a small holding or a large estate. Browse the full range on our tunnel greenhouse page, or compare it against the film greenhouse and glass greenhouse ranges.
An exhaust fan at one gable end draws air out of the tunnel. Fresh air enters through the cooling pad at the other end and drops in temperature as it passes through the wet pad.
It is a film house built as one bay on galvanized steel hoops. Fewer posts and less steel bring the cost per square metre down against a wider house.
The hot dip galvanized steel frame is rated for 15 to 20 years under normal growing conditions. The film cover is replaced on a shorter cycle.
Span is available in 8m, 9m, 10m, 11m and 12m. Total height runs from 3m to 8m, and length from 10m to 100m or to your site requirement.
The frame ships as a knockdown kit of galvanized pipe and hoops, with the film in rolls. Our engineers can travel to your site to guide installation when required.
