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Item Number: SEF110

Automatic Vent Opener - Standard

Automatic Vent Opener - Standard

Use on Coldframes or Greenhouses

Ingenious temperature-sensitive device that automatically opens and closes coldframe lids, greenhouse windows and even skylights. Works throughout the day and maintain a constant interior climate, something impossible to achieve by manual adjustments.

  • Requires no batteries or electricity.
  • It can be adjusted to start opening between 60-77°F. Fully open at 86-90°F. Fully closed at 55°F.
  • Strongly recommended for all our glazed season extenders because it dramatically improves plant growth.
  • The hydraulic cylinder comes with a 1 year warranty. The average lifetime of the cylinder is 5-10 years, although some can last up to 20 years.
  • Screw directly into polycarbonate panels, wood, or metal frames. The Standard Vent Opener can open a hinged window or vent weighing as much as 15 lb. For larger panes use the stronger Gigavent with all metal construction, to lift up to 65 lbs.

Note from the manufacturer: Recommended to lubricate the piston rod yearly, this will help extend the lifetime of the hydraulic cylinder. Don't use solid grease, as dust particles "glues" easily onto the piston rod and can damage the rubber. Also do not forget to unlock the vent in the winter if leaving the vent openers installed. Even a weak winter sun can heat the hydraulic cylinder sufficiently to make it start pushing the piston rod outwards.

Replacement cylinders are available.

$49.99
Discount applied. Offer ends soon.
Next-day shipping available

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Description

Ingenious temperature-sensitive device that automatically opens and closes coldframe lids, greenhouse windows and even skylights. Works throughout the day and maintain a constant interior climate, something impossible to achieve by manual adjustments.

  • Requires no batteries or electricity.
  • It can be adjusted to start opening between 60-77°F. Fully open at 86-90°F. Fully closed at 55°F.
  • Strongly recommended for all our glazed season extenders because it dramatically improves plant growth.
  • The hydraulic cylinder comes with a 1 year warranty. The average lifetime of the cylinder is 5-10 years, although some can last up to 20 years.
  • Screw directly into polycarbonate panels, wood, or metal frames. The Standard Vent Opener can open a hinged window or vent weighing as much as 15 lb. For larger panes use the stronger Gigavent with all metal construction, to lift up to 65 lbs.

Note from the manufacturer: Recommended to lubricate the piston rod yearly, this will help extend the lifetime of the hydraulic cylinder. Don't use solid grease, as dust particles "glues" easily onto the piston rod and can damage the rubber. Also do not forget to unlock the vent in the winter if leaving the vent openers installed. Even a weak winter sun can heat the hydraulic cylinder sufficiently to make it start pushing the piston rod outwards.

Replacement cylinders are available.

Shipping Information

Ships from Northern CA.

Shipping Weight: 2.0 lb

Dimensions: 15.0"L x 3.75"W x 2.0"H

Features

  • Replacement Parts Available

Characteristics

Use Instructions

Useful Information

Guarantee

View full details

Customer Reviews

Based on 21 reviews
71%
(15)
24%
(5)
0%
(0)
0%
(0)
5%
(1)
P
Phil
Work very well, last about a decade.

I build my greenhouse from a kit more than ten years ago. I just replaced the originals. Installation was easy and they work really well. The open very widely as soon as it gets hot and slam tightly shut on a cold night.

R
Rebecca Morrill
Great

My last one I had for years. I installed it on my homemade greenhouse ( Using polycarbonate panels I got from peaceful Valley) and It has been a life saver. If only it would survive freezing weather.

J
Jim
Great device

Overall, these work great. I’ve been using two of them for about three months to open the coldframe and they have worked great. Then a tornado went nearby and broke one of the aluminum parts at a weak point. Ok, so not everyone has tornados, but that weak point could be made stronger.

I’d still give them a five star rating.

T
Teresa Hines
Automatic Vent Opener

Liked the first vent opener so well, we ordered another one. These work great!

A
Ashlee
Works great

Used it to vent our homemade cold frame. Supports our wood and glass lid with no problem

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