4. Rack installation connecter
3. Bearing block: 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 maximize warmth and sunlight and your cold frame, choose an optimal area to put your structure. Select a south-facing spot that offers plenty of sunlight. Avoid spots near trees or additional structures where snow or leaves can put on your cold framework. This may 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 benefit of a cold body greenhouse. Since outdoor sunshine and temperature effect a cold frame’s internal temperature, easily adapt your cold framework during unseasonable heat waves. During these occasions, open up 
your structure and allow sufficient airflow to gear rack for automobile provide plants preferred warmth without suffocating them.
Use your cold framework for growing inside your means. As stated previously, cool frames are excellent for extending the growing season of cool-time of year vegetables in the springtime and winter. When hardening off tender plants and seedlings, frosty frames also allow for a less strenuous transition for plants from inside to outside. Stick to choices that survive inside your location’s current weather range, not completely out-of-season plant types. The internal temperatures are just slightly warmer and more managed than the outdoors. So, plants should handle the highs and the lows of your region 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 dependable. and may be control automaticly.
Extend the growing season for cool-time of year crops. Because frosty frames provide a slightly warmer and more managed environment than external temperatures, these devices help gardeners start vegetation without worry of frost or frozen floor. Plants won’t be suffering from unseasonably cold or warm weather we often encounter during springtime and fall. Frosty frames work ideal for cool-season plants because 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 plant life, minimize sunlight and keep maintaining adequate soil moisture. This ensures plant life won’t attempt to grow but don’t completely dry out either.
Harden off delicate plants and seedlings. Cold body greenhouses help plants make the changeover from indoor plant life to outdoor plants. Whether you started seedlings in your house or a greenhouse, plant life must gradually modify to the modify in temperature, sunlight, dampness, and exposure outdoors. With a cold framework, plants are controllably subjected to these adjustments, while still keeping sufficiently shielded. Once plants modify to the climate change in your cold body, after that transplant them to your backyard.
Cold frame greenhouses are relatively simple 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.