Auto Vent Replacement Cylinder

Auto Vent Replacement Cylinder

A replacement cylinder for automatic vent openers. Give your vent openers a new lease of life without buying the whole mechanism again.

Fits all Winter Gardenz greenhouse cylinders, plus many other models.

1-Year Warranty

Please note: this is the black replacement cylinder only, not the full mechanism.

The cylinders work on a wax-based mechanism, so there's no electricity needed. Over time the wax wears down, which means a cylinder usually lasts 1 to 2 years. You can make it last longer by unscrewing it over winter while the vents stay shut. We don't recommend them for coastal or beachfront spots, as the conditions there are too harsh.

Troubleshooting: Vent not closing? Check it isn't catching on the roof ribs next to the vent opening. Strong wind can push the vent along the ridge, so just slide it back into the centre channel. The cylinder is designed to open once it's above 17°C (63°F), so to check the vent closes fully, disengage it for a moment.

How to Install, Plus Tips: