4. Rack installation connecter
3. Bearing block: 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 frosty frame. In order to maximize warmth and sunlight as well as your cold frame, choose an optimal location to put your structure. Select a south-facing spot that offers lots of sunlight. Avoid areas near trees or additional structures where snow or leaves can put on your cold frame. This could result in harm to your structure or sunlight blockage.
Allow ventilation on hotter days. An excessive amount of warmth is not always a very important thing – and that’s the benefit of a cold framework greenhouse. Since outdoor sunshine and temperature effect a cold frame’s inner temperature, easily change your cold body during unseasonable temperature waves. During these occasions, open up your structure and allow sufficient airflow to give plants desired warmth without suffocating them.
Use your cold frame for growing inside your means. As stated previously, cold frames are great for extending the growing season of cool-period vegetables in the spring and wintertime. When hardening off tender plants and seedlings, frosty frames also enable an easier transition for vegetation from inside to outdoors. Stick to choices that survive inside your location’s current environment range, not totally out-of-season plant types. The internal temperatures are just slightly warmer and more managed than the outdoors. So, plant life 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 utilized for the side window openingh or the roof widoiw opening system. The rack and pinion program move smoothly and reliable. and can be control automaticly.
Extend the season for cool-season crops. Because frosty frames provide a somewhat warmer and more controlled environment than external temperature ranges, these products help gear rack for automobile gardeners start plants without worry of frost or frozen ground. Plants won’t be suffering from unseasonably cold or warm weather we often encounter during spring and fall. Frosty frames work great for cool-season plants because they can withstand the low evening temperatures.
Overwinter dormant vegetation. While a cold body greenhouse won’t enable tender plants to keep growing through winter, these structures can protect them during dormancy. When overwintering plant life, minimize sunlight and keep maintaining adequate soil dampness. This ensures plants won’t attempt to grow but don’t completely dry out either.
Harden off delicate plant life and seedlings. Cold framework greenhouses help vegetation make the transition from indoor vegetation to outdoor plant life. Whether you began seedlings in your home or a greenhouse, vegetation must 
gradually modify to the alter in temperature, sunlight, dampness, and exposure outdoors. With a cold framework, plants are controllably subjected to these changes, while still remaining sufficiently safeguarded. Once plants change to the climate alter in your cold frame, then transplant them to your garden.
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 to be able to maximize the benefits of your structure.