The streamline door was invented in Norway by Haygrove sales agents, Simen and Ole Myhrene. It is the best sealed door for forcing forward early crops. In addition, it is the most aero-dynamic door and performs very well in heavy storms to deflect wind. This is the door of choice for growers forcing early crops under Haygrove Solo Tunnels.

A simple and cost effective way to seal ends of tunnels. Haygrove will provide training on alternative configurations from simple plastic curtains secured with ropes to steel framed plastic curtains that can be more easily opened and closed through a rope and pulley system.

Roller ends are available for all types of Haygrove Tunnel. Options are available for a manual roller end or a mechanical door that can be driven with a ‘Makita’ style power drill. For doors driven mechanically with a power drill, up to 6 doors can be opened and closed with one gear box mechanism.

Driven through a 3-phase electric motor and gear box, Haygrove electric doors are designed to open and close up to 16 doors at one go. For powering, the doors can be linked to either mains electricity brought directly to the field through a solar panelled unit charging battery cells or via a portable power pack that can move from door motor to door motor.

For larger scale sites with numbers of electric door units and perhaps numbers of electric roof vents, Haygrove can provide integrated systems of control. The system is configured with a series of Outstation Units that operate individual tunnel blocks linked to sensors for Temperature and Relative Humidity (RH). Each outstation is then linked to the Base Station unit that is located say in the Farm Office or Farm House. The Base Station Unit will provide central control for all outstations on the farm and also can be linked via the web to remote laptops or smart phones.

For easy access for pickers and farm staff, or for specialist propagation units, personnel doors can be built into the ends or side of the tunnel block.