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 best location for your cold frame. In order to maximize warmth and sunlight and your cold frame, choose an optimal location to put your structure. Choose a south-facing spot that offers lots of sunlight. Avoid places near trees or additional structures where snow or leaves can put on your cold framework. This could result in harm to your structure or sunshine blockage.
Allow ventilation on hotter days. An excessive amount of warmth is not always a good thing – and that’s the advantage of a cold body greenhouse. Since outdoor sunshine and temperature effect a cold frame’s inner temperature, easily modify your cold body during unseasonable warmth waves. Of these occasions, open your structure and invite sufficient airflow to give plants preferred warmth without suffocating them.
Use your cold gear rack for Greenhouse framework for growing inside your means. As stated previously, frosty frames are excellent for extending the developing season of cool-season vegetables in the spring and winter season. When hardening off tender plant life and seedlings, frosty frames also allow for an easier transition for vegetation 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 somewhat warmer and more managed compared to the outdoors. So, vegetation should manage the highs and the lows of your region fairly well while safeguarded in your cool frame.
The rack and pinion drive system is for the mult-span agriculture venlo greenhouse ventilation system, it can be utilized for the side window openingh or the roof widoiw opening system. The rack and pinion 
system move smoothly and dependable. and may be control automaticly.
Extend the growing season for cool-time of year crops. Because chilly frames provide a somewhat warmer and more managed environment than external temps, these devices help gardeners start plant life without worry of frost or frozen floor. Plants won’t be affected by unseasonably cold or hot weather we often encounter during spring and fall. Frosty frames work ideal for cool-season plants as they can withstand the low evening temperatures.
Overwinter dormant plant life. While a cold framework greenhouse won’t enable tender plants to continue growing through winter season, these structures can protect them during dormancy. When overwintering plant life, minimize sunlight and maintain adequate soil moisture. This ensures plant life won’t attempt to grow but don’t completely dry either.
Harden off delicate plants and seedlings. Cold framework greenhouses help plant life make the changeover from indoor vegetation to outdoor vegetation. Whether you began seedlings in your house or a greenhouse, plants must gradually adapt to the change in temperature, sunlight, moisture, and exposure outdoors. With a cold framework, plants are controllably subjected to these adjustments, while still staying sufficiently protected. Once plants change to the climate alter in your cold framework, after that transplant them to your garden.
Cold body greenhouses are relatively simple to use for any or all the reasons listed above. However, keep these couple of tips in mind to be able to maximize the advantages of your structure.