Description
Have you noticed that your AVO’s aren’t opening properly? It may be time to replace the cylinder in your Automatic Vent Opener. Please note that this listing is for replacement AVO cylinders only.
For complete Automatic Vent Openers please view this listing.
MK7 Triple Spring AVO (Automatic Vent Openers)
The standard Bayliss MK7 automatic vent opener will open your roof vents so you don’t have to! The MK7 AVO is always recommended for your double side vents, as the three springs will help to pull the side vent shut, sealing off the greenhouse vent. (MK7 Triple Spring AVO and Hydraulicheck AVOs use the same replacement cylinders).
MK7 Triple Spring opening range: 55F (13C) – 70F (21C)
Only sold in packs of 2.
Hydraulicheck AVO (Automatic Vent Openers)
If your greenhouse is in an area that experiences high winds, upgrade from the MK7 Triple Spring opener to the Hydraulicheck opener. While the two do look very similar, there is one key difference . The standard MK7 has its downward tension from three springs, pulling the roof vent closed. However, the Hydraulicheck replaces the center spring with a hydraulic, slowing down the movement of the vent opener. This will restrict it from slapping down on the frame when closed on a windy day. (MK7 Triple Spring AVO and Hydraulicheck AVOs use the same replacement cylinders).
Hydraulicheck opening range: 55F (13C) – 70F (21C)
Only sold in packs of 2.
Orchid Wax AVO (Automatic Vent Openers)
The Orchid Wax AVO is the perfect vent opener for your hot house environment, allowing your greenhouse to warm up a little more, before the vents engage.
Orchid Wax opening range: 70F (21C) – 85F (30C)
Only sold in packs of 2.
Super Heavy AVO (Automatic Vent Openers)
The Super Heavy AVO is designed to open double glass roof vents, and can open a max weight of 35 lbs.
Super Heavy opening temperature ranges: 60F (16C) – 75F (24C).
Sold individually.
MK3 AVO (Automatic Vent Opener) – Old Style
The Mk III unit was made during the 1970s and early 1980s from cast aluminum and was coloured silver, green and sometimes orange.
Bayliss MKlll AVO
Only sold in packs of 2.
Read more about the replacement cylinders here: BCG Roof Vent Cylinder Brochure
You check out this instructional video on how to replace your cylinders!
**All sales of Automatic Vent Opener replacement cylinders are final sale
