Looking to replace the cylinders in your Automatic Vent Openers (AVO)? If youโve noticed that your AVOโs are not functioning correctly, itโs likely time for a replacement cylinder. Please note that this listing is for replacement AVO cylinders only.
For complete Automatic Ven Openers please view this listing.
Models
MK7 Triple Spring Automatic Vent Opener
Our standard automatic vent opener for BC Greenhouses. The perfect option for your roof vent openers or double side vents. With three springs to help pull the vents shut and deal off your greenhouse. Sold in packs of 2.
Opening Range
55F (13C) to 70F (21C)
Super Heavy Automatic Vent Opener
Our Super Heavy AVO is designed specifically for double glass roof vents and can handle up to 35 lbs. of attached weight. Sold Individually.
Opening Range
60 F (16C) โ 75F (24C)
Orchid Wax Automatic Vent Opener
The Orchid Wax AVO is the perfect vent opener for your hothouse environment, allowing your greenhouse to warm up a little more than our other options before engaging the vents. Sold in packs of 2.
Opening Range
70F (21C) โ 85F (30C)
MK3 Automatic Vent Opener – Old Style
The MK3 unit was made during the 1970s and early 80s from cast aluminum and was colored silver, green, and sometimes orange
Only sold in packs of 2.
Check out our BCG Roof Vent Cylinder Brochure or watch our video below for instructions on how to replace your cylinder.
