Alton Ventilation

Alton Ventilation

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FREE Technical information to assist you in your choice of greenhouse, Base sizes, Heights and other valuable data.

Roof Vents

Roof Vents


A generous allocation of roof vents is included with every model and every roof vent has an automatic opener included as standard.
These clever devices work through heat expansion alone to open your roof vents gradually as the temperature changes. Fully adjustable,
they help you to create the perfect growing environment.

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