(888) 784-1722

Automatic Vent Opener - Standard - SEF110



Cold Frame and Hotbed Gardening

Cold Frame and Hotbed Gardening

  • In stock. Ships from our warehouse in Northern California.
Buy big, save big with quantity discounts
  • Buy 10 for $35.99 each and save 11%

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.

Replacement cylinders are available.

Screw directly into polycarbonate panels, wood, or metal frames. The Standard Vent Opener can open a hinged window or vent weighing as much as 32 lb.

For larger panes use the stronger Gigavent with all metal construction, to lift up to 65 lbs.

  • Item Model Number: SEF110
  • Shipping Dimensions: 15 x 3.75 x 2 inches
  • Shipping Weight: 2 pounds

Customer Reviews

Agree with everything said but one caution

We have 2 in our 8X16 and I agree with earlyer comments. Just one caution We live in an area that is windy at times. I would install a small link chain that would limit the max opening of vent to just where it stops opening itself. Our's would pull out of the cylinder as the wind grabbed the vent. It would then flap in the breeze which could damage the vent.

Review by (on )
Excellent Tool!

Easy to install (after analyzing the instructions carefully), functions smoothly and efficiently. Has already proven to be invaluable in growing early season plants.

Review by (on )

Bought one of these 8 years ago and it's still growing strong. Absolutely essential cold frame accessory for high altitude gardens where sun is intense but nights are cold.

Review by (on )
'Love em!

I've had two of these on a cold frame and it's the difference between success & failure. Prior to installing them, we'd either forget to open the cold frame, and our things would cook. Or we'd likewise forget to close the cold frame, and things would freeze. This little gem of automation picks up where we leave off.<br /><br /> pax<br />*----->

Review by (on )

Write Your Own Review

You're reviewing: Automatic Vent Opener - Standard

How do you rate this product? *

  1 star 2 stars 3 stars 4 stars 5 stars
Related Content from ourGrowOrganic... for Life!

September 7, 2012 - Charlotte from Peaceful Valley
Use manure to turn a cold frame into a hotbed Warm up your cold frame with help from your friendly neighborhood horse. Horse manure will raise the temperature in a cold frame, and our automatic vent openers will keep the cold frame from over-heating.… read more»
February 8, 2011 - Amber
With the recent warm spell of the past week and a half, at my house, we are in full swing production of seedling transplants in order to plant as soon as the last frost date occurs. The weather has been… read more»

You may also be interested in

Juwel Coldframe - 100/90 Easy Fix
Juwel Coldframe - 100/90 Easy Fix


3 Reviews

Add to Wishlist
Automatic Vent Opener - Gigavent
Automatic Vent Opener - Gigavent


$129.00 As low as: $116.10
Add to Wishlist
Automatic Vent Opener - Standard Replacement Cylinder
Automatic Vent Opener - Standard Replacement Cylinder


$19.99 As low as: $17.99
Add to Wishlist
Creeping Red Fescue  Seed (Lb)
Creeping Red Fescue Seed (Lb)


$3.29 As low as: $1.97
Add to Wishlist
Triple Wall Polycarbonate Panel (4' X 8')
Triple Wall Polycarbonate Panel (4' X 8')


$99.99 As low as: $79.99
Add to Wishlist