Replacement opening vent, or simply opening window kit, suitable for Halls 8ft wide greenhouse range.

If you want to add an additional opening roof vent for your 8ft wide Halls greenhouse this kit is all you need. It replaces an existing piece of 610mm x 610 mm glass in the roof. If you have long pane toughened glass in the roof you will have to buy a shorter piece of toughened glass for the section below the new vent this should measure 610 x 1018.

Adding an additional vent improves the flow of air through the greenhouse which is paramount in the summer months to stop rot and fungus on your precious crops.

How to Fit a Replacement Roof Vent

Fitting them is straight forward. In essence you have to remove a panel of the existing glass (610mm x 610mm) and slide in the opening roof vent when you have screwed it together. The removed glass CANNOT be transferred into the new opening vent you will need to have a glazier cut a piece to size 610 x 559. Comprehensive installation instructions are supplied with the unit as well as a full glazing plan. Note: the opening vent is not supplied with glass.


Fast mainland UK delivery. We also send these vents out around the world, so if you are not in the UK please use the QUESTIONS & ANSWERS tab near the foot of this page and request a postage quote.

Should you require any additional information please feel free to call us, 7 days a week on 0121 747 3046.

Delivery Information


Fast Free Delivery within Mainland UK over £40.00.
Smaller orders under £40.00 are subject to a £1.95 delivery charge. . Delivery will typically be made within 5 - 7 working days but may be extended during busy times of the year.

Extra charges will apply to certain locations for example Isle of Wight and Islands. In some cases we can even deliver outside the mainland e.g. Channel Isles and arrange the VAT element for you. In all instances please contact us today for a personalised quote.

Customer Reviews

Overall Rating 5 / 5 Based On 1 Reviews

Delivery 5 / 5
Quality 5 / 5
Price 5 / 5

Easy to install

With the risk of some sunshine this summer, i decided to add an additional opening in the greenhouse, it was easy to install together with an automatic opener.

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