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Your cart is empty. Ideal for your greenhouse window--opens and closes your greenhouse window as the temperature changes automatically, maintains the best growing temperature and prevents your greenhouse from overheating.
No batteries or electrical power needed.
The liquid-filled cylinders expand as temperature increases.
Including fittings & installation manual.
Can be clamped onto or screwed onto your greenhouse frame.
Important notice: Do not use this opener anywhere the temperature will exceed 50° (122F).
Please ensure your greenhouse window can be opened freely by at least 45cm (18").
Do not apply excessive loads by locking or covering window.
Do not dismantle the cylinder.
The opener CANNOT stop by manual.
Item Specifications:
Maximum window opening 45cm
Maximum opening about 30°, depending on adjustment and load
Maximum opening weight 7kg/15lb
Adjustable open temperature range 15°- 25°/60°-77F
Package：
1 x Automatic window opener
Dre
2025-08-06 17:22:04
This Jack-Store Solar Heat Sensitive Automatic Thermofor Window Opener Greenhouse Autovent Vent Opener worked very well. It opens the window vent automatically whenever the greenhouse gets too warm. Easy enough to install.
Phyllis P.
2025-07-25 17:11:39
Took a couple of weeks to get here. But it is well represented and arrived in good condition. Would order again should I need this item again.
Customer
2025-04-19 13:13:07
Used for my 6x8 hf greenhouse it installed easily. Works really well.
Customer
2025-03-21 14:20:58
Worked fantastic "at first". By srart of second season, not at all. Bummer purchase. No longer avail. So no contact with seller. I feel ripped off.
Nicholas Zigich
2025-03-10 12:19:53
Works well, opens and closes everyday. Wish it opened wider. Also does not close with much force, a gravity assisted window would be best.
hugh watson mcdowell jr.
2025-02-16 17:31:30
Works very well, have used this for 6 weeks and have not had any problems.
Two Pilots
2025-02-11 17:48:54
One of my units is still forking, however the second failed after only partially working for a few months.
Nancy R.
2024-12-16 12:33:18
Piece of junk. Doesn’t work. Followed directions and the piston never moved the window. Looking elsewhere.
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