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 best location for your cold frame. To be able to maximize warmth and sunlight and your cold frame, pick an optimal area to place 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 sunshine blockage.
Allow ventilation upon hotter days. Too much warmth is not always a very important thing – and that’s the advantage of a cold framework greenhouse. Since outdoor sunshine and temperature influence a cold frame’s internal temperature, easily adapt your cold framework during unseasonable warmth waves. During these occasions, open your structure and allow sufficient airflow to give plants desired warmth without suffocating them.
Use your cold framework for growing inside your means. As mentioned previously, chilly frames are excellent for extending the growing season of cool-time of year vegetables in the spring and wintertime. When hardening off tender plants and seedlings, frosty frames also enable a less strenuous transition for plants from inside to outside. Stick to options that survive within your location’s current weather range, not totally out-of-season plant varieties. The internal temperatures are only slightly warmer and more controlled compared to the outdoors. So, plant life should handle the highs and the lows of your area fairly well while protected 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 gear rack for automobile openingh or the roof widoiw opening system. The rack and pinion program move smoothly and reliable. and may 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 temperatures, these products help gardeners start plant life without worry of frost or frozen ground. Plants won’t be suffering from unseasonably cold or hot weather we often encounter during springtime and fall. Frosty frames work ideal for cool-season plants as they can withstand the low evening temperatures.
Overwinter dormant plants. While a cold body greenhouse won’t allow tender plants to keep growing through wintertime, these structures can protect them during dormancy. When overwintering plants, minimize sunlight and maintain adequate soil moisture. This ensures plant life won’t attempt to develop but don’t completely dry either.
Harden off delicate plant life and seedlings. Cold body greenhouses help vegetation make the transition from indoor vegetation to outdoor plants. 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 exposed to these adjustments, while still keeping sufficiently safeguarded. Once plants adapt to the climate alter in your cold framework, after that transplant them to your garden.
Cold body greenhouses are not at all hard to use for just about any or all of the reasons in the above list. However, keep these few tips in mind in order to maximize the advantages of your structure.