Insulated Polytunnels (Twin Skinned)
Polythene clad structures (polytunnels) hold heat as well as, if not better, than glass structures. Twin-skinned polythene clad structures can reduce the rate of heat loss by a further 30%-40% compared to single-skinned polythene structures.
So, it can make perfect sense to twin-skin your polytunnel where heat inputs are used. This is a relatively simple task which requires an inflation fan to blow air between two layers of polythene, creating an air bubble and insulating the structure. Clear polythene covers are often preferred, as two diffused covers could restrict too much daylight.
The fan is operated by air pressure, so if air leaks out from between the two polytunnel covers (causing a fall in pressure) the fan’s sensor automatically switches it on and tops up the air. During periods of snow, the air pressure can be relaxed to allow the sheets to touch, thus using the heat transfer to melt any unwanted snow loading.
Twin-skinned polytunnels can be supplied as a complete package, or we can upgrade existing polytunnels. Alternatively, you can purchase the parts required separately. Several covers can be inflated from a single fan (up to 1,000m²), using our ‘linking’ kits.
Heaters
We can supply a full range of heaters from a small propane fuelled frost protection heater to a large oil fuelled heating system that will integrate with an environment controller.
Concept Heaters (Direct and In-Direct Fired)
Convector Heater with 12vDC/240vAC Fan
Easy Clean, In-Direct Fired Cabinet Heaters
Contact our sales team so that we can help choose the right heater for your polytunnel.
Thermal / Energy Screens
Screens are used more and more in greenhouses. They can limit the loss of energy, provide a more even climate in the greenhouse, reflect excess sunlight or even darken the greenhouse.
We divide screens into the following categories.
- Energy Saving Screens.
- Shading Screens.
- Combined Shading & Energy Saving Screens.
- Light Diffusing Screens.
- Assimilation and Black-Out Screens.
- Vertical Screens.
Contact us for more information