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Your cart is empty.Doug H.
Reviewed in the United States on March 9, 2025
Amazing device really. So convenient that it works without any battery, electrical plug, or solar collector. The contents of the cylinder expand when warn and push the window open gradually. Of course the process reverses when it cools. You have some control over how sensitive it is, i.e. at what temperature it starts to open. It's pretty easy to install. Because of the configuration of my particular greenhouse window frame I needed to drill two small holes but that was easy.
bart s.
Reviewed in the United States on January 10, 2025
Flat out did not work. I have, and am, using others, so I am familiar with the device.
Dasha Barmina
Reviewed in the United States on July 13, 2024
Does what it needs to do, opens on time and closes. Perfect.
Mike from NJ
Reviewed in the United States on August 20, 2023
The adjustments on this opener will not close it all the way and this is a double spring opener. I have one that came with a another greenhouse and that closes all the way at 65°. They need to use a different piston. It wants to open more than needed. If not for the pin stop installed it would break the vent door. This is built sturdy.
jimmy
Reviewed in the United States on May 21, 2023
The instructions were clear and it installed and works as advertised. We've just started the greenhouse season so we'll see how they last. They have a one year warranty.
manuela maier
Reviewed in Germany on March 29, 2023
leichte Montage - lediglich die mitgelieferten Schrauben sind meiner Meinung nach leider zu kurz - musste eigene längere dafür nehmen.Vor allem bin ich begeistert, dass es funktioniert.. habe ein Frühbeet von Juwel.. es geht in der Früh super toll auf - und am Abend wenn es kühler wird geht es zu. Traumhaft! Ich habe 2 davon gekauft.. echt super.
DAC
Reviewed in the United States on March 24, 2023
This exact same opener is sold by several sellers under different names. This particular one is identical to a previous purchase costing $6 more.I used them for homemade cold frames and they work perfectly. It keeps air temperature around 70 degrees F. It baffles me why the cylinder is panted black because it can open due to sun shining on it long before air temperature within cold frame reaches 70. However on average with nighttime temperatures in the 20-30 F range and daytime 45-55 range it seems to stabilize around 70 in partial sun.
scott tucker
Reviewed in the United States on December 24, 2023
They work great
Lothar Huemer
Reviewed in Germany on April 7, 2023
alles ok
Kunde
Reviewed in Germany on September 8, 2022
Alles OK gerne wieder
Oldboy
Reviewed in the United Kingdom on August 23, 2022
Nothing to dislike
Customer
Reviewed in the United States on August 20, 2022
does what it is supposed to do, nice sturdy build, very pleased.
Marco
Reviewed in Germany on October 10, 2022
Die Montage war erst nicht ganz eindeutig aber hat dann doch gut funktioniert.Bis jetzt stabil und funktioniert.Also Daumen hoch.
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