You can improve the performance of the ventillation in your greenhouse by adding autovents. These handy decvices open vents automatically and don't require batterys. Also, they tend to allow the vent to open more than a conventional manual opener, equaling better ventalation.
The Bayliss XL is made with a stronger frame, this means it performs better than the classic auto vent in wind. Comes with fittings to allow them to be added to any vent

A delivery charge will apply to this product. [more]
Please note: delivery is charged per order, not per item.
| UK area | Charge |
| Mainland England and Wales
| £3.00 |
| Scotland - Southern mainland
| £3.00 |
| Scotland - mid mainland | £3.00 |
| Scotland - highlands | £3.00 |
| UK offshore and overseas | Please call 0870 442 2328 for prices |
| Non-UK | Please call 0870 442 2328 for prices |