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Greenhouse Ventilation

Plant Protection Ventilation in a greenhouse is essential for healthy plant growth. Greenhouse Plant Protection Ventilation will help to control both the temperature in the greenhouse and the humidity within the greenhouse. If there is inadequate Plant Protection Ventilation your greenhouse is likely to overheat - from spring until autumn greenhouses are vulnerable to overheating - and without protection from this excessive heat plants are likely to be damaged.

Plants are damaged by excessive heat as their leaf temperature increases to such a level that tissue damage occurs. Leaf temperature is mainly controlled by the movement of water through the plant and out through the surface of the leaf - this action has a cooling effect on the leaf, so reducing the leaf temperature. So if the soil / compost which your plants are growing in dries out due to excessive temperatures, there will be less water to move through the plant, so less cooling. Air movement over the plant leaves also has a cooling effect so it is important that you ensure your greenhouse has sufficient Plant Protection Ventilation - places where air can come in and go out. Greenhouse Plant Protection Ventilation can be controlled by opening the door of the greenhouse, opening roof vents - manually or by the use of automatic openers and by the use of louvre windows.


Bayliss XL Vent Opener
This Bayliss XL is an extremely reliable automatic vent opener.
The opener is activated by a stainless steel cylinder containing a mineral wax which expands with heat; this pushes a piston causing the vent to open. As the temperature falls the wax contracts and a strong stainless steel spring closes the opener.


Bayliss MK 7 Vent Opener
Suitable for use on nearly all greenhouses this Bayliss MK7 is an extremely reliable, British made, automatic vent opener.
The bayliss Mk7 vent opener is operated by a stainless steel cylinder containing a mineral wax which expands with heat; this pushes a piston causing the vent to open. As the temperature falls the wax contracts and a strong stainless steel spring closes the opener.


Triple Spring Bayliss MK 7 Vent Opener
This Bayliss MK7 Triple Spring is an extremely reliable automatic vent opener.
This particular unit is designed to be fitted to top hinged, side windows or exposed roof vents, the three springs fitted are designed to hold the windows / vents firmly in place in windy conditions, and with the extra springs, to exert a greater closing force.


Bayliss MK 7 Hydraulicheck Vent Opener
An extremely reliable automatic vent opener with unique features.
The Bayliss Hydraulicheck Vent Opener has a small hydraulic damper which causes the vent to open slowly but to close very quickly making the opener suitable for use on greenhouse roof vents in exposed areas, the unique damper will prevent the vent from being wrenched open in high winds and subsequently damaged.


Super Bayliss MK 7 Vent Opener
This extremely reliable automatic vent opener, the Bayliss MK7 Super has been designed to lift very heavy double-glazed windows weighing up to 35 lbs. (16kg).


Air Blower
This powerful electric Air BLower will enable good air circulation, useful both in Summer and Winter.
In summer it will help to combat excessive temeratures, whilst in winter good air circulation is essential for the prevention of diseaeses, such as 'damping off'.

Air Circulation Fan
Air movement in the greenhouse is important all year round to reduce the risk of plant disease and damping-off.
This 20 watt electrically operated Air Circulation Fan generates very gentle air movement which is all that is needed to disperse stagnant air pockets, without causing a draught.


Extractor Fan Only
Extracting air from your greenhouse is very important in the Summer months when temperatures rise and heat builds up.
Simply fit the powerful Extractor Fanwithin your greenhouse, plug in, switch on and the fan will draw the hot air out of your greenhouse, thus safeguarding your plants.
By using the extractor fan at the same time as having the door or windows open, air will be circulated throughout your greenhouse for a healthier growing environment.

Louvre Kit
Increase ventilation and air circulation in your greenhouse with this five bladed Louvre Kit designed to be fit in either an aluminium or wooden greenhouse.


Automatic Louvre Opener
This Automatic Louvre Opener, opens and closes your Louvre Window as the temperature changes.
Making sure your greenhouse does not overheat whilst your at work or away on holiday.


Replacement Cylinder for Automatic Louvre Opener
An easy to fit replacment cylinder for the Automatic Louvre Opener manufactured by Thermoforce.


Replacement Cylinder For XL Vent Opener
This easy to fit Replacement Cylinder is suitable for the Bayliss XL vent openers manufactured since 2001.


Replacement Power Cylinder for MK 7 Range
This Replacement Cylinder is suitable for the Bayliss MK7, MK7 Triple Spring and Hydraulicheck automatic openers.


Replacement Cylinder for MK 7 Super Vent Opener
This Replacement Cylinder is suitable for the Bayliss MK7 Super Vent Opener.


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