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Greenhouse Ventilation

Greenhouse Ventilation is achieved with a combination of roof vents, louvre vents, greenhouse door and fans. Excellent ventilation is essential if your greenhouse crops are to thrive. Greenhouse Ventilation controls both the temperature and humidity of the air in the greenhouse - both of which are essential factors when it comes to healthy plant growth and bumper crops. Basically you need cool air to be drawn into the greenhouse and hot air to be driven out. This can be achieved by the installation of sufficient vents - such as louvre vents and roof vents - ideally fitted with automatic openers, together with the use of greenhouse fans. If you intend to grow in your greenhouse all year round then consider fitting an extractor fan in the greenhouse. Extractor fans are designed to completely replace the air in a greenhouse every few minutes even on the hottest days. Attached to a thermostat, the fan will run automatically. Remember that it is always better to over ventilate your greenhouse than under ventilate it.
  • Bayliss XL Vent Opener

    £25.55

    For roof vents weighing up to 12lbs, approx.30" x 24" (76cm x 61cm). Can be clamped onto aluminium greenhouses - no need for any drilling. If a mor...

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    £25.55
  • Louvre Kit

    £34.99

    The kit is not of a fixed width, it wll fit 90% of all greenhouses, the width of the kit is determined by the spacing of your glazing bars. The kit...

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    £34.99
  • Replacement Power Cylinder for MK 7 Range

    £19.45

    Easy to fit. This cylinder is filled with a wax that expands in warm temperatures - it can be set to start opening from around 12*C / 55*F up to ...

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    £19.45
  • Replacement Cylinder For XL Vent Opener

    £18.99

    Dimensions: 8ľ" (22cm) long body. For roof vents weighing up to 12lbs, approx.30" x 24" (76cm x 61cm). Exerts a load of 11lbs (5Kg) i.e. it will l...

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    £18.99
  • Bayliss XL Vent Opener in Black

    £26.55

    This reliable vent opener works by a wax within the cylinder of the opener expanding when it's hot, pushing a piston to open the window. When it co...

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    £26.55
  • Bayliss MK 7 Vent Opener

    £41.45

    Bayliss guarantee their openers for 2 years but if anything should go wrong after that replacement cylinders are readily available and easy to fit....

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    £41.45
  • 3kW Greenhouse Fan Heater

    £69.99

    Versatile - this heater has three setting, with options of fan only, 1.5kW and 3kw and is capable of heating a greenhouse up to 10' x 12'. IP24 Ra...

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    £69.99
  • Bayliss Automatic Louvre Opener

    £21.55

    Temperature adjustable - you can set the opener to start opening the louvre from 15-18*C, with a maximum opening at approximately 30*C. Easy Fittin...

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    £21.55
  • Automatic Rion Roof Vent Opener

    £61.00

    Fully Automatic - Opens your roof vent as the temperature rises maximising ventilation and air circulation. Fully Adjustable - Has an adjustable ...

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    £61.00
  • Air Blower

    £159.99

    Moves a huge 420 cubic metres of air per hour. Only consumes 69 watts of power. Designed to be suspended using the two 11" (28cm) long zinc plated ...

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    £159.99
  • Triple Spring Bayliss MK 7 Vent Opener

    £43.75

    For side windows up to approx.36" x 24" (92cm x 61cm). Bolts on to aluminium greenhouses (fixings supplied) - for wooden greenhouses it is attached...

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    £43.75
  • Thermostatic Extractor Fan

    £189.00

    A window mounted unit with manual storm guard to prevent back draughts. Suitable for use in single glazed windows. Automatically controlled by a re...

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    £189.00
  • Solar Powered Extractor Fan

    £81.95

    Powered by sunlight. Silent, secure ventilation. Requires a 4 ˝" (115mm) hole to be cut out and can be fitted in polycarbonate, glass or wood. ...

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    £81.95
  • Auto Louvre Opener for Rion Greenhouse

    £87.00

    Easy to fit - Designed specifically to fit the Rion Louvre Window. Automated - Automatically opens the louvre window, it also has a release catch ...

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    £87.00
  • Extractor Fan Only

    £113.99

    Fan Speed: 2000 rpm - moves 400 cubic metres of air per hour (for example in an area 8’ x 12’ the air would be changed every 3˝ minutes)  Wattage:...

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    £113.99
  • Bayliss MK 7 Hydraulicheck Vent Opener

    £70.99

    For roof or side windows in severely exposed positions weighing up to 14lbs, approx.30" x 30" (76cm x 76cm). Bolts on to aluminium greenhouses (f...

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    £70.99
  • Super Bayliss MK 7 Vent Opener

    £125.45

    For large roof vents weighing up to 35lbs. Bolts on to aluminium greenhouses (fixings supplied) - for wooden greenhouses it is attached by wood s...

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    £125.45
  • Replacement Cylinder for MK 7 Super Vent Opener

    £59.99

    Unique, ultra strong, finned aluminium cylinder with both internal and external finns - this gives a more efficient heat exchange between the wax i...

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    £59.99
  • Palram Canopia Louvre Window

    £76.99

    This louvre can be fitted into any side of the greenhouse, including the back of the greenhouse opposite the door. However, it can not be fitted in...

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    £76.99
  • Bayliss MK 7 Orchid House Vent Opener

    £47.99

    Designed for aluminium or timber framed vents measuring up to 60cm square (2ft square) lifting a load of up to 6kg (14lbs). Provides a maximum ...

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    £47.99
  • Cylinder & Washer to fit Orchid Opener

    £19.99

    Easy to fit. This cylinder is filled with a wax that expands in warm temperatures, it can be set to start opening from around 75*F up to 90*F. Le...

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    £19.99