--- product_id: 14097535 title: "Greenhouse Univent Window Opener" brand: "orbesen" price: "β‚©175398" currency: KRW in_stock: true reviews_count: 8 category: "Orbesen" url: https://www.desertcart.kr/products/14097535-greenhouse-univent-window-opener store_origin: KR region: South Korea --- # Easy tool-free clip system Lifts up to 15 lbs Temp-activated 65-77Β°F Greenhouse Univent Window Opener **Brand:** orbesen **Price:** β‚©175398 **Availability:** βœ… In Stock ## Summary > 🌿 Keep your greenhouse cool, hands-free, and hassle-free with the Univent Window Opener! ## Quick Answers - **What is this?** Greenhouse Univent Window Opener by orbesen - **How much does it cost?** β‚©175398 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/14097535-greenhouse-univent-window-opener) ## Best For - orbesen enthusiasts ## Why This Product - Trusted orbesen brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Smart Climate Control:** Automatically opens vents between 65-77Β°F for perfect greenhouse airflow. - β€’ **Versatile & Removable:** Unique hinge design fits cold frames, doors, vents, and windows with quick-release clip for easy access. - β€’ **Effortless Installation:** Screws directly into polycarbonate, wood, or metal framesβ€”no extra tools needed. - β€’ **Heavy-Duty Lift Capacity:** Supports up to 15 lbs, handling large windows and vents with ease. - β€’ **Durable Danish Engineering:** Aluminum build with a 3-year manufacturer replacement guarantee ensures long-lasting reliability. ## Overview The Greenhouse Univent Window Opener is a temperature-activated, hydraulic vent opener designed for professional-grade greenhouse ventilation. It automatically opens windows and vents between 65-77Β°F, lifting up to 15 lbs with a durable aluminum frame. Featuring an innovative easy-clip system for tool-free removal and backed by a 3-year manufacturer warranty, this Danish-engineered device ensures reliable, hands-free climate control for your garden or greenhouse. ## Description UNIVENT Automatic Window Opener uses our powerful temperature sensitive hydraulic cylinder that has been in use for decades as the standard in reliability to open cold frames, windows, vents, doors, tunnels, hot houses and demi-lumes. The key features that differentiate UNIVENT is it's compact design, EASY-CLIP-SYSTEM, Double Spring Design, and now our Security Tape for closing the hinge up for winter. The innovative EASY-CLIP-SYSTEM makes it easy to rapidly disconnect one end of the opener without any cumbersome tools, simply undo the clip and have access to the inside of your opening, even in the closed position. The standard cylinder carries a Manufacturer coverage for replacement for 3 years, and replacement cylinders are also easily available to purchase. Material: Aluminum Maximum opening width: 17.5 inches Maximum opening temperature at 86 degrees F Maximum lift: 15 pounds Made in Denmark under the strictest quality standards in the industry. This is a professional and serious home and garden vent opener made by the same company in Denmark since 1978 by Johannes Orbesen and his world famous "Open Sesame" invention. Review: Gardener, open that window!!! - So far, so good! I attached it to a wood frame on a cattle panel greenhouse. I had to figure out how to mount it so it would work with my window setup, but I got that done. Since it was hot outside when I installed it, I left the cylinder in my cooler house. Once it was installed it didn't take much time to start opening the window. Now I have to see how it functions so that I can adjust it for warmer temps. I will keep an eye on it, since the cylinder that came with it was dated "2019", so that is a 7-yr old cylinder. Overall, as of installation yesterday, mid-April, it is doing its job, as expected. Review: Works - Good quality. It's interesting to see it open and close on its own as the temperature changes. I like that doesn't require any external input to do its job. I did have a few issues in high wind with it coming undone at the bottom where it's intended to be removable. It wasn't damaged, and just popped back in. ## Features - Temperature Activated (Heat, Sun, Solar) Vent Opener can lift up to 15 lbs - Starts opening between 65 to 77 degrees F, depending on how you have adjusted the cylinder - Easy to install, Screws directly into polycarbonate panels, wood, or metal frames - Unique hydraulic cylinder has 3 year manufacturer replacement guarantee - Versatile hinge opens cold frames, doors, vents and windows ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0083IZG0A | | Best Sellers Rank | #472,486 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #43 in Greenhouse Window Openers | | Brand | Orbesen | | Brand Name | Orbesen | | Closure Type | Tape | | Color | black | | Cover Material | Polycarbonate (PC) | | Customer Reviews | 4.5 out of 5 stars 773 Reviews | | Frame Material | Aluminum | | Global Trade Identification Number | 05701972183313 | | Indoor Outdoor Usage | Outdoor | | Item Weight | 14.08 ounces | | Manufacturer | J. Orbesen Teknik Aps | | Manufacturer Part Number | 441665 | | Model Number | 441665 | | Number Of Vents | 2 | | Number of Doors | 1 | | Size | 17.5 inches | | Special Features | Removable | | Weight Capacity | Maximum weight: 15 Pounds | ## Product Details - **Color:** black - **Brand:** Orbesen - **Item Weight:** 14.08 ounces - **Cover Material:** Polycarbonate (PC) - **Frame Material:** Aluminum ## Images ![Greenhouse Univent Window Opener - Image 1](https://m.media-amazon.com/images/I/71B9Mk3laWL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Gardener, open that window!!! *by B***E on April 15, 2026* So far, so good! I attached it to a wood frame on a cattle panel greenhouse. I had to figure out how to mount it so it would work with my window setup, but I got that done. Since it was hot outside when I installed it, I left the cylinder in my cooler house. Once it was installed it didn't take much time to start opening the window. Now I have to see how it functions so that I can adjust it for warmer temps. I will keep an eye on it, since the cylinder that came with it was dated "2019", so that is a 7-yr old cylinder. Overall, as of installation yesterday, mid-April, it is doing its job, as expected. ### ⭐⭐⭐⭐⭐ Works *by J***H on January 3, 2026* Good quality. It's interesting to see it open and close on its own as the temperature changes. I like that doesn't require any external input to do its job. I did have a few issues in high wind with it coming undone at the bottom where it's intended to be removable. It wasn't damaged, and just popped back in. ### ⭐⭐⭐⭐⭐ get one or face death *by P***L on March 23, 2014* Not yours, your seedlings'. If you're getting your first coldframe or a simple greenhouse, you really need an automatic vent opener. Unless you are in your garden religiously every day, there will come that unexpected warm, sunny day early in the season when you'll forget to prop up the lid on the cold frame. You'll come home to find all your lovely, tender seedlings, with all their promise of bursting youth and color, lying limp and toasted and very dead all across your six-paks. Six weeks of careful tending and happy anticipation ruined in a moment. Some gardeners never recover. So save yourself the heartache and get an automatic vent opener. I've used the Univents and they are very dependable. They work off the temperature of the air, which causes the oil in the black cylindrical cartridge to expand and push forward the piston-rod in the cartridge. No electricity, no wires, very simple, very little to go wrong. Installing one can be confusing to figure out, mostly because they are designed to work with so many different possible vent configurations, but some staring at the (small) drawings for awhile will provide necessary clues. Once you understand what goes where, the actual installation is pretty easy. One other nice thing about the Standard Univent is that you can easily unhook it from its lower bracket (the one on the coldframe wall), so you can swing the lid up completely free and have full access to the interior. Very quick. I haven't used any other kind of auto vent opener so can't make any comparisons, but the Univents have been very reliable. ## Frequently Bought Together - Greenhouse Univent Window Opener - 1" S-Shaped Silver Wire Hook Connectors Chain Hardware for Hanging Products or Items, Fishing Lure, Net Equipment, Key Ring Assembly (95 Pack) - Gridwall Joining Clips Connectors for Grid Panels - Black Color - Box of 25 Pcs. --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.kr/products/14097535-greenhouse-univent-window-opener](https://www.desertcart.kr/products/14097535-greenhouse-univent-window-opener) --- *Product available on Desertcart South Korea* *Store origin: KR* *Last updated: 2026-07-06*