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Ventilation (21)

Ventilation

Ventilation is absolutely vital on a greenhouse. It¹s not just to keep the

greenhouse cool, although that is of course, important. It¹s also to

create a movement of air that helps to prevent powdery mildew and damping

off. The ideal ventilation in a greenhouse would have about twice as many

roof vents as side louvre vents. The roof vents will allow hot air out of

the top of the greenhouse, but if there are no louvres in the side of the

greenhouse these will not perform as well as they could in conjunction

with louvres. The cool fresh air would be sucked in through the louvres

and warm air would then rise easily through the roof vents. One of the

first items on your shopping list for a greenhouse must be automatic

openers for your roof vents. These superb inventions work by heat

expansion alone and will open your roof vents gradually as the greenhouse

warms up. That way you never have to remember to open your greenhouse

vents or close them again at night. All the different models of auto-vent

will lift the same weight of about 7 kg (ample for all our greenhouses)

but the stronger ones perform better in the wind.

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03155
Bayliss Replacement cylinder for XL Opener
£18.00
5 out of 5 stars5 out of 5 stars5 out of 5 stars5 out of 5 stars5 out of 5 stars (7)
  • £16.20 with Bank Holiday offer
  • The discount will automatically be applied to your basket
05784
Bayliss Replacement cylinder for XL Opener (Black)
£18.00
  • £16.20 with Bank Holiday offer
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00051
Simplicity Classic auto opener for vent
£27.00
5 out of 5 stars5 out of 5 stars5 out of 5 stars5 out of 5 stars5 out of 5 stars (26)
  • £24.30 with Bank Holiday offer
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00255
Simplicity Auto louvre opener
£32.00
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  • £28.80 with Bank Holiday offer
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00094
Bayliss XL Opener
£33.00
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Save 22%
05494
Bayliss MK7 Triple spring Auto-vent
£49.99 £38.90
Special offer save £11.09
Offer ends on 01/05/2017
  • £35.01 with Bank Holiday offer
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Save 20%
02907
Robinsons Auto roof vent opener XL
£54.00 £43.00
Special offer save £11.00
Offer ends on 01/05/2017
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02186
Robinsons Auto 6 slat louvre opener D474
£63.00 £44.00
Special offer save £19.00
Offer ends on 01/05/2017
  • £39.60 with Bank Holiday offer
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04379
Alton Evolution louvre opener
£58.00 £44.00
Special offer save £14.00
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02910
Bayliss Auto roof vent opener MK7
£65.00 £44.10
Special offer save £20.90
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  • £39.69 with Bank Holiday offer
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00052
Simplicity Louvre plain aluminium
£48.00
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00246
Bayliss MK7 Auto opener for a vent
£48.00
Only 1 left!
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02682
Alton Auto louvre opener for Alton Heritage
£72.00 £54.00
Special offer save £18.00
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  • £48.60 with Bank Holiday offer
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03115
Bayliss MK7 Auto roof vent opener for Alton
£72.00 £54.00
Special offer save £18.00
Offer ends on 01/05/2017
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05496
Bayliss Mk 7 Hydraulicheck Unit
£89.00 £59.00
Special offer save £30.00
Offer ends on 01/05/2017
  • £53.10 with Bank Holiday offer
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03866
Halls Green finish louvre
£70.00
  • £63.00 with Bank Holiday offer
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00053
Simplicity Louvre green finish
£85.00
Only 3 left!
  • £76.50 with Bank Holiday offer
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03285
Robinsons 6 Slat Louvre Plain Aluminium
£105.00
  • £94.50 with Bank Holiday offer
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Save 36%
00401
Robinsons 6 Slat Louvre Green
£185.00 £118.00
Special offer save £67.00
Offer ends on 01/05/2017
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06081
Robinsons 6 Slat Louvre Anthracite
£185.00 £118.00
Special offer save £67.00
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02110
Robinsons 6 Slat Louvre White
£202.00 £129.00
Special offer save £73.00
Offer ends on 01/05/2017
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  • £116.10 with Bank Holiday offer
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