4. Rack installation connecter
3. Bearing block: gear rack for Greenhouse 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. To be able to maximize warmth and sunlight and your cold frame, pick 
an optimal location to place your structure. Choose a south-facing spot that provides lots of sunlight. Avoid spots near trees or other structures where snow or leaves can pile on your cold body. This may result in damage to your structure or sunlight blockage.
Allow ventilation on hotter days. Too much warmth isn’t always a very important thing – and that’s the benefit of a cold frame greenhouse. Since outdoor sunshine and temperature impact a cold frame’s inner temperature, easily adjust your cold body during unseasonable temperature waves. Of these occasions, open your structure and invite sufficient airflow to provide plants preferred warmth without suffocating them.
Use your cold body for growing within your means. As stated previously, chilly frames are excellent for extending the developing season of cool-season vegetables in the spring and wintertime. When hardening off tender plants and seedlings, cold frames also enable an easier transition for vegetation from inside to outdoors. Stick to options 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, plant life should deal with the highs and the lows of your region fairly well while protected in your cold 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 system move smoothly and dependable. and can be control automaticly.
Extend the growing season for cool-season crops. Because cold frames provide a somewhat warmer and more controlled environment than external temps, these products help gardeners start vegetation without worry of frost or frozen surface. 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 because 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 wintertime, these structures can protect them during dormancy. When overwintering vegetation, minimize sunlight and maintain adequate soil moisture. This ensures plants 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 plant life. Whether you started seedlings in your home or a greenhouse, vegetation must gradually adjust to the alter in temperature, sunlight, dampness, and exposure outside. With a cold framework, plants are controllably exposed to these changes, while still remaining sufficiently protected. Once plants change to the climate modify in your cold body, then transplant them to your garden.
Cold frame greenhouses are not at all hard to use for 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.