Images
Product Details
Product Overview
Detailed information on what you get
Delivery
How soon can you get this product
Reviews
5.0
Average Rating
23
Reviews
Optional extras
The finishing touches that make it yours. Browse the extras below and add anything you fancy straight to your basket.
Cylinder for Thermofor roof vent opener
Replacemt cylinder suitable for Thermofor roof vent openers onlyPlease note this is the cylinder only, no fittings are included. Prior to fitting please ensure you put the tube in the fridge for half an hour so the wax inside can contract allowing the piston rod to depress. Push the piston rod against a hard surface so it goes back into the tube. Without cooling the tube the unit cannot be set accurately. The arms of the unit need to be in the closed position when being attached and set to ensure that the vent and slam mounts align. Overall length: 200mm (8 inches).
Find out more
£16
Customer Reviews
(5.0)
23 reviews, average 5.0 out of 5 stars
Based on 23 reviews
Review data
5 star reviews
- 100.0%
4 star reviews
- 0.0%
3 star reviews
- 0.0%
2 star reviews
- 0.0%
1 star reviews
- 0.0%
Customer feedback
Share your thoughts
If you’ve purchased this product, share your thoughts with other customers.
Recent reviews
Maurice Shakespeare
5 out of 5 stars
Great service with speedy delivery.
September 2026
Tanya Muldoon
5 out of 5 stars
Great replacement cylinder. Followed the instructions (not included) & seems to be working as it should. It would be useful to include instructions with the item rather than having to look on website
May 2026
Peter Shaw
5 out of 5 stars
I ordered the vent opener from the Greenhouse people as our very old one had stopped working. It was very straightforward to place the order, and the item was despatched very quickly at a sensible price.
May 2026
lan Joyner
5 out of 5 stars
Excellent service, friendly helpful people.iI would recommend them highly.
May 2026
Page 1 of 6
