4. Rack installation connecter
3. Bearing prevent: coopersleeve or nylon Sleeve
2. Rack and pinion: curved or directly 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 location to put your structure. Choose a south-facing spot that provides plenty of sunlight. Avoid places near trees or various other structures where snow or leaves can put on your cold frame. This may result in damage to your structure or sunshine blockage.
Allow ventilation on hotter days. Too much warmth is not always a good thing – and that’s the advantage of a cold body greenhouse. Since outdoor sunlight and temperature impact a cold frame’s internal temperature, easily adapt your cold body during unseasonable warmth waves. During these occasions, open up your structure and allow sufficient gear rack for automobile airflow to give plants preferred warmth without suffocating them.
Use your cold framework for growing inside your means. As stated previously, frosty frames are excellent for extending the developing season of cool-period vegetables in the springtime and wintertime. When hardening off tender plants and seedlings, frosty frames also enable an easier transition for plant life from inside to outside. Stick to choices that survive within your location’s current environment range, not completely out-of-season plant varieties. The internal temperatures are only somewhat warmer and more controlled than the outdoors. So, plant life should handle the highs and the lows of your region fairly well while secured in your frosty 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 reliable. and may be control automaticly.
Extend the season for cool-time of year crops. Because cold frames provide a somewhat warmer and more controlled environment than external temps, these systems help gardeners start plants without worry of frost or frozen surface. Plants won’t be suffering from unseasonably cold or warm weather we often experience during spring and fall. Cool frames work great 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 continue growing through winter season, these structures can protect them 
during dormancy. When overwintering vegetation, minimize sunlight and keep maintaining 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 plant life to outdoor plants. Whether you started seedlings in your home or a greenhouse, plants must gradually change to the alter in temperature, sunlight, dampness, and exposure outside. With a cold framework, plants are controllably exposed to these adjustments, while still staying sufficiently protected. Once plants change to the climate change in your cold framework, then transplant them to your backyard.
Cold framework greenhouses are relatively simple to use for any or all the reasons listed above. However, keep these few tips in mind in order to maximize the advantages of your structure.