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Automatic Window Opener with Single Spring

$19.99 38 % OFF $31.99
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Greenhouse Automatic Window Opener:
It's an ideal way to provide extra ventilation for your greenhouse during the hot weather. With the ingenious temperature-sensitive device, it can automatically open the frame lid when the temperature reaches a certain level; and close the frame lid when the temperature drops.
In this way, the window opener ensures your plants have sufficient airflow throughout the day!

Main Features:
- Open automatically when the temperature rises, while closing automatically when the temperature drops, replace the manual window arm
- Made of aluminum and stainless steel, durable and weather resistant
- Can be installed quickly and easily
- No battery or electricity needed, no running costs
- The maximum window opening distance is approximately 45cm/18 inch
- Suitable for greenhouse windows weight up to 7kg/15 lbs
- Universal fit: suitable for any aluminum frame greenhouse

Please Note:
1. Before installation, please keep the expansion device in the fridge for a night and manually adjust it to the closed state.
2. Your automatic window control is not suitable for where the temperature exceeds 50 Deg.C/122 Deg.F.
3. Ensure that your greenhouse window is able to open and is not obstructed, otherwise, damage could occur.
4. Lubricate all movable parts with a light oil after fitting. Apply petroleum jelly or grease to the expansion device thread occasionally.

1.Q: why there is oil on the expansion device surface? Is it damaged?
A: no. It's normal that the expansion device surface coming with a layer of oil, which can be protective.
2.Q: why the expansion device cannot extend?
A: it may get stuck, just need to adjust it manually or lubricate it with oil.

Drive mode: automatic
Product name: greenhouse window opener
Operation temperature: 15 - 25 Deg.C/60 - 77 Deg.F
Material: aluminum and stainless steel
Expansion device finishing: spray painting
Max open distance: 45cm/18 inch
Max load: 7kg/15 lbs
Package weight: 0.440 kg
Package Size(L x W x H): 9.50 x 4.50 x 37.50 cm / 3.74 x 1.77 x 14.76 inches
Package Contents: 1 x Window Opener, 1 x Hydraulic Expansion Device, 1 x Bag of Install Fittings, 1 x English User Manual