Replacement opening green vent, or simply opening window kit, suitable for Halls 6ft wide green coloured greenhouse range.

If you want to add an additional opening roof vent for your 6ft wide Halls green greenhouse this kit is all you need. It replaces an existing piece of 600mm x 600mm (24ins x 24ins) 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.

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 (600mm x 600mm) and slide in the opening roof vent when you have screwed it together. The removed glass is then transferred into the new opening vent. Comprehensive installation instructions are supplied with the unit.

Note 1: The opening vent is not supplied with glass. Note 2: This additional roof vent will only fit the current 6ft x 4ft Halls Popular / Supreme greenhouses and not the original 6ft x 4ft models. The current 6ft x 4ft models are supplied with one roof vent as standard, the original 6ft x 4ft models are not supplied with any. It will fit ALL current 6ft wide Halls Greenhouses as the title suggests, with the sole exception of the Universal range.


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.


Brand: Halls
Type: Ventilation
Delivery Information

Fast Free UK Delivery on orders over £60.00.*
Smaller orders under £60.00 are subject to a £2.95 delivery charge. Delivery will typically be made within 2 - 3 working days but may be extended during peak times.

We Can Offer Next Day Delivery for £7.95*
To meet our deadline for this service you must order before 11.00am to ensure delivery for the next working day. This excludes weekends and bank holidays.

*Extra charges or restrictions will apply to certain UK postcodes. These include parts of Scotland, The Highlands, Northern Ireland and offshore Isles. Please note Next Day delivery is not available to these locations. Please click here for a full list of postcode exclusions and contact us today for a personalised quote. 

Customer Reviews

Overall Rating 4.3 / 5 Based On 1 Reviews

Delivery 5 / 5
Quality 5 / 5
Price 3 / 5

Fitting Halls roof vent to a Gardman 6x4 greenhouse

Needed a roof vent for my 6x4 greenhouse but the company (Gardman) did not manufacture such an item. However found that I could fit the Hall's AGL roof vent kit with only minor modification. This went through easily and am really pleased with the result.

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