Price: $69.95
Availability: In Stock - Usually ships in 1 to 2 days.

This cylinder tube powers the Gigavent automatic openers with no need for electricity. It contains a mineral wax which expands with heat. This pushes a piston which opens the auto vent via a balanced linkage. As the temperature drops, the wax shrinks and a strong spring closes the vent and resets the piston. Made in Denmark.

While this cylinder for the Gigavent automatic vent opener lasts a long time, eventually the piston rod moving through the seals will wear the seal material away, allowing a gradual seepage of wax out of the tube. This in turn reduces the pressure within the tube and eventually the opening distance achieved will be affected. This is when you need to replace the power tube cylinder.

Overall Customer Rating of 1 Reviews:
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Burke VA

Perfect replacement for worn out cartridge

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I was pleased to find a stateside replacement part for the Gigavent ventalator at ACF Greenhouses. Even better is the fact they are located here in Virginia. My cartridge (2015 date code) finally gave out after six years of seasonal use and to find a new one so close by was a treat. The new one should last many years. ACF provided a quick turnaround on my order. I wish they had to option to use PayPal but the order process was fairly quick without it. I'll certainly keep them in mind when I need other greenhouse products.