4. Rack installation connecter

3. Bearing prevent: coopersleeve or nylon Sleeve

2. Rack and pinion: curved or straight rack, nylon or cooper sleeve for the pinion

1. Gear motor : 550W/750W

Choose the right location for your cold frame. In order to maximize warmth and sunlight as well as your cold frame, choose an optimal area to place your structure. Choose a south-facing spot that offers plenty of sunlight. Avoid spots near trees or other structures where snow or leaves can pile on your cold framework. This may result in damage to your structure or sunshine blockage.
Allow ventilation upon hotter days. Too much warmth isn’t always a very important thing – and that’s the benefit of a cold body greenhouse. Since outdoor sunlight and temperature influence a cold frame’s inner temperature, easily change your cold body during unseasonable heat waves. During these occasions, open your structure and allow sufficient airflow to provide plants desired warmth without suffocating them.
Use your cold body for growing inside your means. As mentioned previously, cool frames are great for extending the growing season of cool-period vegetables in the spring and wintertime. When hardening off tender plants and seedlings, cold frames also enable a less strenuous transition for plants from inside to outside. Stick to choices that survive inside your location’s current environment range, not completely out-of-season plant varieties. The internal temperatures are only slightly warmer and more managed than the outdoors. So, plants should handle the highs and the lows of your area fairly well while protected in your cold frame.
The rack and pinion drive system is for the mult-span agriculture venlo greenhouse ventilation system, it can be used for the side window openingh or the roof widoiw opening system. The rack and pinion program move smoothly and reliable. and will be control automaticly.

Extend the season for cool-period crops. Because cold frames provide a slightly warmer and more managed environment than external temps, these models help gardeners start plant life without worry of frost or frozen floor. Plants won’t be affected by unseasonably cold or warm weather we often encounter during spring and fall. Cool frames work great for cool-season plants as they can withstand the low evening temperatures.
Overwinter dormant plant life. While a cold body greenhouse won’t enable tender plants to keep growing through winter season, these structures can protect them during dormancy. When overwintering plant life, minimize sunlight and maintain adequate soil dampness. This ensures plants won’t attempt to develop but don’t completely dry out either.
Harden off delicate plant life and seedlings. Cold framework greenhouses help plant life make the changeover from indoor plant life to outdoor plant life. Whether you began seedlings in your home or a greenhouse, vegetation must gradually modify to the alter in temperature, sunlight, dampness, and exposure outside. With a cold framework, plants are controllably exposed to these gear rack for automobile adjustments, while still keeping sufficiently safeguarded. Once plants modify to the climate change in your cold frame, then transplant them to your backyard.
Cold framework greenhouses are not at all hard to use for just about any or all the reasons listed above. However, keep these few tips in mind to be able to maximize the advantages of your structure.