Robert S. Hoffman
Reviewed in the United States on March 4, 2024
The supposed temperature regulated shaft does not move regardless of temperature. These wax filled cylinders appear to be all made by the same company in China. This one and another that I tried from a different vendor both did not work. A gas filled cylinder is a much better choice. However, not available on Amazon.
Mr B.
Reviewed in the United States on March 31, 2024
Easy to install and is effective but needs to be protected from frost or dismantled during the very cold periods.
Princess Lucky
Reviewed in the United States on March 12, 2024
Overall, the Tellegloww Replacement Cylinder for Automatic Vent Opener worked as intended.I had automatic vent openers in my greenhouse and one of the cylinders finally gave out. These are usually very expensive so imagine my surprise when I found this one for under 20 bucks.It fits on my vent opener even though it's a bit longer than the original cylinder.I did have a problem with the installation though. The damn cylinder wouldn't budge at all. It was stuck. I had to throw it in a freezer and on a heat source when it finally moved. I wish it had come with instructions or tips on compressing it.Would buy again.
David S.
Reviewed in the United States on April 25, 2024
OverviewThe Tellegloww Replacement Cylinder is designed as a component for automatic greenhouse vent openers, meant to operate based on temperature changes. This review evaluates its functionality based on the user's experience with temperature responsiveness and overall performance.Pros- Price: Noted for being more affordable compared to other gas cylinder options, which could be a point of interest for budget-conscious consumers.Cons- Lack of Responsiveness: The cylinder failed to activate at the listed temperatures, showing no movement even when subjected to extreme conditions in a freezer and a solar kiln at approximately 100 degrees Fahrenheit.- Non-Operational: The product did not compress or extend as expected, rendering it ineffective as a replacement for more reliable automatic vent opening systems.Final ThoughtsDespite its attractive price point, the Tellegloww Replacement Cylinder for Automatic Vent Openers does not fulfill its intended purpose. The lack of responsiveness to temperature changes and its failure to operate as described significantly undermines its utility in a greenhouse setting where reliable venting is crucial. Based on this experience, it is difficult to recommend this product as a viable replacement for more dependable gas cylinders. Users considering this replacement should be wary of its operational issues and might need to explore other more reliable alternatives to ensure proper greenhouse ventilation.