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 frosty frame. In order to maximize warmth and sunlight and your cold frame, choose an optimal area to put your structure. Select a south-facing spot that provides plenty of sunlight. Avoid places near trees or additional structures where snow or leaves can pile on your cold framework. This could result in harm 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 body greenhouse. Since outdoor sunshine and temperature influence a cold frame’s internal temperature, easily modify your cold body during unseasonable high temperature waves. Of these occasions, open up your structure and invite sufficient airflow to give plants desired warmth without suffocating them.
Use your cold body for growing within your means. As mentioned previously, frosty frames are great for extending the developing season of cool-season vegetables in the springtime and winter. When hardening off tender vegetation and seedlings, frosty frames also enable an easier transition for plant life from inside to outdoors. Stick to choices that survive within 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 deal with the highs and the lows of your area fairly well while guarded in your chilly 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 gear rack for Greenhouse widoiw opening system. The rack and pinion system move smoothly and dependable. and can be control automaticly.

Extend the growing season for cool-season crops. Because chilly frames provide a somewhat warmer and more controlled environment than external temperature ranges, these systems help gardeners start plant life without worry of frost or frozen surface. Plants won’t be suffering from unseasonably cold or warm weather we often encounter during springtime and fall. Cold frames work ideal for cool-season plants because they can withstand the lower evening temperatures.
Overwinter dormant plant life. While a cold body greenhouse won’t enable tender plants to continue growing through wintertime, these structures can protect them during dormancy. When overwintering vegetation, minimize sunlight and maintain adequate soil dampness. This ensures plant life won’t attempt to grow but don’t completely dry either.
Harden off delicate plant life and seedlings. Cold frame greenhouses help plants make the changeover from indoor plant life to outdoor vegetation. Whether you began seedlings in your home or a greenhouse, vegetation must gradually modify to the change in temperature, sunlight, dampness, and exposure outdoors. With a cold framework, plants are controllably subjected to these changes, while still keeping sufficiently secured. Once plants adapt to the climate change in your cold frame, then transplant them to your garden.
Cold framework greenhouses are relatively simple to use for any or all the reasons in the above list. However, keep these couple of tips in mind in order to maximize the benefits of your structure.