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 best location for your chilly frame. In order to maximize warmth and sunlight as well as your cold frame, choose an optimal location to place your structure. Select a south-facing spot that offers lots of sunlight. Avoid places near trees or other gear rack for Greenhouse structures where snow or leaves can put on your cold frame. This could result in harm to your structure or sunlight blockage.
Allow ventilation upon hotter days. An excessive amount of warmth isn’t always a good thing – and that’s the advantage of a cold framework greenhouse. Since outdoor sunshine and temperature impact a cold frame’s internal temperature, easily adapt your cold framework during unseasonable temperature waves. Of these occasions, open your structure and invite sufficient airflow to provide plants desired warmth without suffocating them.
Use your cold body for growing inside your means. As mentioned previously, chilly frames are excellent for extending the growing season of cool-period vegetables in the springtime and winter. When hardening off tender vegetation and seedlings, cool frames also allow for a less strenuous transition for plants from inside to outside. Stick to choices that survive within your location’s current environment range, not completely out-of-season plant types. The internal temperatures are only slightly warmer and more managed than the outdoors. So, vegetation should manage the highs and the lows of your region fairly well while safeguarded in your frosty frame.
The rack and pinion drive system is for the mult-span agriculture venlo greenhouse ventilation system, it can be used 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 season for cool-time of year crops. Because chilly frames provide a somewhat warmer and more managed environment than external temperature ranges, these devices help gardeners start vegetation without worry of frost or frozen ground. Plants won’t be affected by unseasonably cold or warm weather we often encounter during springtime and fall. Cold frames work great for cool-season plants as they can withstand the lower evening temperatures.
Overwinter dormant vegetation. While a cold body greenhouse won’t enable tender plants to continue growing through wintertime, these structures can protect them during dormancy. When overwintering plant life, minimize sunlight and keep maintaining adequate soil moisture. This ensures plants won’t attempt to grow but don’t completely dry out either.
Harden off delicate plant life and seedlings. Cold body greenhouses help plant life make the changeover from indoor plants to outdoor plants. Whether you began seedlings in your home or a greenhouse, plants must gradually modify to the modify in temperature, sunlight, moisture, and 
exposure outdoors. With a cold body, plants are controllably subjected to these changes, while still remaining sufficiently secured. Once plants change to the climate alter in your cold framework, after that transplant them to your garden.
Cold framework greenhouses are relatively simple to use for any or all of the reasons in the above list. However, keep these few tips in mind to be able to maximize the benefits of your structure.