Vent Mechanisms
Effective environmental control should include ensuring there is effective air circulation through any greenhouse. Most plants need this to grow well, and airflow minimises stagnant air contributing to plant disease.
This can be achieved utilising side and roof vents to encourage airflow into and out of the greenhouse. These can be manually operated or automated with our electric motor. They can also be integrated with the heating via Harrier’s HH2 controller.
Traditional manual side vents can also bring a timeless finish to the interior of any greenhouse.
Side Vents
These are normally operated manually and there are two options:
A. Individual vents are pushed out and set in position by a notched metal stay, known as a ‘monkey tail’ due to the typical twist at the end of the push rod.
B. For larger runs of vents it is more usual to operate these together. A bank of top hung vents, opened a little, is better than one or two fully opened individual vents. The operation is via a series of metal linkages, comprising attachment cleats, push rods, levers and a torque tube suspended by elegant cast tube carriers with nylon bushes. The linkage operating the vents is opened and closed via a wonderful solid cast lever handle.
Roof Vents
These can be opened in a number of ways:
Manually – in a similar way to the side vents, with lever and links.
Automatic – utilising Harrier Garden developments motor and gearbox to operate the vents with a series of push rods. These work best with a run of vents. Motors can also be supplied for individual vents.
Other – there are other mechanisms which rely on the sun/heat to work, but unfortunately are not consistent enough to be reliable for serious growers.