4. Rack installation connecter
3. Bearing block: 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 chilly frame. To be able to maximize warmth and sunlight and your cold frame, choose an optimal area to place your structure. Select a south-facing spot that offers plenty of sunlight. Avoid places near trees or other structures where snow or leaves can pile on your cold framework. This could result in harm to your structure or sunlight blockage.
Allow ventilation on hotter days. An excessive amount of warmth is not always a very important thing - and that’s the benefit of a cold body greenhouse. Since outdoor sunshine 
and temperature impact a cold frame’s inner temperature, easily adjust your cold body during unseasonable high temperature waves. During these occasions, open your structure and invite sufficient airflow to give plants preferred warmth without suffocating them.
Use your cold frame for growing inside your means. As mentioned previously, frosty frames are great for extending the developing season of cool-season vegetables in the spring and winter. When hardening off tender plants and seedlings, cool frames also enable a less strenuous transition for plant life from inside to outside. Stick to options that survive inside your location’s current environment range, not gear rack for Greenhouse completely out-of-season plant types. The internal temperatures are only somewhat warmer and more managed compared to the outdoors. So, plant life should handle the highs and the lows of your area fairly well while guarded in your cold frame.
The rack and pinion drive system is for the mult-span agriculture venlo greenhouse ventilation system, it can be utilized for the medial side window openingh or the roof widoiw opening system. The rack and pinion system move smoothly and dependable. and will be control automaticly.
Extend the growing season for cool-period crops. Because cold frames provide a somewhat warmer and more managed environment than external temperatures, these units help gardeners start plant life without worry of frost or frozen surface. Plants won’t be affected by unseasonably cold or hot weather we often encounter during spring and fall. Chilly frames work ideal for cool-season plants as they can withstand the low evening temperatures.
Overwinter dormant vegetation. While a cold body greenhouse won’t allow tender plants to keep growing through wintertime, 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 plants and seedlings. Cold frame greenhouses help vegetation make the changeover from indoor plants to outdoor plants. Whether you started seedlings in your home or a greenhouse, plant life must gradually modify to the change in temperature, sunlight, moisture, and exposure outside. With a cold frame, plants are controllably exposed to these adjustments, while still remaining sufficiently protected. Once plants adapt to the climate alter in your cold body, then transplant them to your backyard.
Cold body greenhouses are not at all hard to use for any or all the reasons in the above list. However, keep these few tips in mind to be able to maximize the advantages of your structure.