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 cool frame. To be able to increase warmth and gear rack for Greenhouse sunlight as well as your cold frame, choose an optimal area to put your structure. Choose a south-facing spot that provides lots of sunlight. Avoid areas near trees or various other structures where snow or leaves can put 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 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 inner temperature, easily adapt your cold framework during unseasonable temperature waves. During these occasions, open your structure and allow sufficient airflow to give plants desired warmth without suffocating them.
Use your cold body for growing within your means. As stated previously, cold frames are excellent for extending the developing season of cool-time of year vegetables in the springtime and wintertime. When hardening off tender vegetation and seedlings, cold frames also allow for an easier transition for plants from inside to outside. Stick to choices that survive inside your location’s current climate range, not completely out-of-season plant varieties. The internal temperatures are just somewhat warmer and more controlled than the outdoors. So, plants should handle the highs and the lows of your area fairly well while shielded in your cool 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 system move smoothly and reliable. and can be control automaticly.

Extend the season for cool-season crops. Because cold frames provide a slightly warmer and more controlled environment than external temperature ranges, these products help gardeners start plant life without worry of frost or frozen floor. Plants won’t be suffering from unseasonably cold or warm weather we often encounter during spring and fall. Cold frames work ideal for cool-season plants as they can withstand the low evening temperatures.
Overwinter dormant vegetation. While a cold frame greenhouse won’t allow tender plants to keep growing through winter season, these structures can protect them during dormancy. When overwintering plants, minimize sunlight and keep maintaining adequate soil moisture. This ensures vegetation won’t attempt to grow but don’t completely dry out either.
Harden off delicate plant life and seedlings. Cold framework greenhouses help plants make the changeover from indoor plant life to outdoor plants. Whether you began seedlings in your home or a greenhouse, plant life must gradually adapt to the modify in temperature, sunlight, moisture, and exposure outdoors. With a cold body, plants are controllably exposed to these changes, while still keeping sufficiently protected. Once plants modify to the climate alter in your cold framework, after that transplant them to your backyard.
Cold frame greenhouses are not at all hard to use for just about any or all the reasons listed above. However, keep these couple of tips in mind in order to maximize the advantages of your structure.