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 frosty frame. In order to increase warmth and sunlight and your cold frame, pick an optimal area to put your structure. Select a south-facing spot that offers plenty of sunlight. Avoid spots near trees or other structures where snow or leaves can pile on your cold frame. This may result in damage to your structure or sunshine blockage.
Allow ventilation upon hotter days. An excessive amount of warmth is not always a good thing – and that’s the benefit 
of a cold frame greenhouse. Since outdoor sunshine and temperature influence a cold frame’s inner temperature, easily modify your cold frame during unseasonable heat waves. Of these occasions, open your structure and allow sufficient airflow to provide plants preferred warmth without suffocating them.
Use your cold frame for growing within your means. As mentioned previously, frosty frames are great for extending the developing season of cool-period vegetables in the spring and wintertime. When hardening off tender plants and seedlings, cold frames also allow for a less strenuous transition for plants from inside to outdoors. Stick to options that survive inside your location’s current weather range, not totally out-of-season plant varieties. The internal temperatures are just somewhat warmer and more managed compared to the outdoors. So, plants should manage the highs and the lows of your area fairly well while shielded 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 side window openingh or the roof widoiw opening system. The rack and pinion program move smoothly and dependable. and may be control automaticly.
Extend the season for cool-season crops. Because cool frames provide a somewhat warmer and more controlled environment than external temperature ranges, these systems help gardeners start plants without worry of frost or frozen surface. Plants won’t be affected by unseasonably cold or warm weather we often encounter during springtime and fall. Cool frames work great for cool-season plants as they can withstand the lower evening temperatures.
Overwinter dormant plant life. 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 vegetation, minimize sunlight and maintain adequate soil dampness. This ensures plants won’t attempt to grow but don’t completely dry either.
gear rack for Greenhouse Harden off delicate vegetation and seedlings. Cold framework greenhouses help plant life make the transition from indoor vegetation to outdoor plant life. Whether you began seedlings in your home or a greenhouse, plant life must gradually adjust to the change in temperature, sunlight, dampness, and exposure outside. With a cold frame, plants are controllably subjected to these changes, while still remaining sufficiently protected. Once plants change to the climate alter in your cold framework, after that transplant them to your backyard.
Cold body greenhouses are not at all hard to use for just about any or all the reasons in the above list. However, keep these few tips in mind to be able to maximize the benefits of your structure.