(Suitable for Extreme Climates) Precision Climate Control Commercial Multi - Span Semi - Closed Greenhouse - Manufacturer Direct Supply - SAINPOLY
The SAINPOLY semi-closed greenhouse is specially developed for year-round tomato planting in areas with extreme climates. The adjustable opening and closing structure realizes precise control of temperature, humidity and carbon dioxide, cutting energy consumption by 40%-60% compared with fully closed greenhouses and lifting carbon dioxide enrichment efficiency by 30%-50%. It adopts insect-proof screen filtration and positive pressure insect prevention. We supply directly from the factory and provide full-process turnkey services.
5.0
Model:
Sainpoly-Semi-closed Greenhouse
Minimum order quantity:
3000 square meters
Brand:
SAINPOLY
Price terms:
EXW, FOB, CIF
Origin:
Weifang, Shandong
Delivery method:
Air/Sea/Land (upon request)
Payment methods:
Telegraphic transfer (T/T), letter of credit (L/C)
Delivery date:
30-60 days (depending on project size)
Production capacity:
Annual output of over 200 hectares
Packaging:
Unified classification and packaging according to international standards
design customization
Please fill out the form below to request a quote or to request more information about us. Please be sure to upload customized requirement documents or pictures, and we will get back to you as soon as possible with a response. we're ready to start working on your new project, contact us now to get started.
Please fill out the form below to request a quote or to request more information about us. please be as detailed as possible in your message, and we will get back to you as soon as possible with a response. we're ready to start working on your new project, contact us now to get started.
Product Description
Semi-Closed Greenhouse for Tomatoes in Extreme Climates
SAINPOLY semi-closed greenhouse is designed for year-round tomato cultivation in extreme climate regions. Positioned between open greenhouses and fully enclosed plant factories, it balances environmental stability and operational cost efficiency. The adjustable opening and closing structure opens for ventilation and heat dissipation in hot seasons and closes to retain heat in cold seasons. Equipped with hot water fin tube heating and wet pad fan cooling, it can ensure stable tomato production under temperatures ranging from -35°C bitter cold to 45°C extreme heat.
The semi-closed structure boosts CO₂ enrichment efficiency by 30-50% compared with open greenhouses. Insect screen filtration and positive pressure system effectively block pests and diseases and cut pesticide application. Its energy consumption is 40-60% lower than fully closed greenhouses, far superior to equivalent precision environmental control solutions. SAINPOLY provides full-process one-stop services covering climate data analysis, structural design, factory prefabrication and on-site installation and commissioning.
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Product Advantages
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The main frame is constructed with Q235B and higher-grade high-standard steel processed by hot-dip galvanizing, with a galvanized coating thickness of no less than 180g/m², far exceeding the standard for ordinary steel. A single upright column can bear a load of several tons. The overall structure has a service life of over 15 years, with industry-leading performance in snow load resistance and wind uplift resistance.
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It opens for ventilation and heat dissipation in hot seasons and closes for heat preservation and storage in cold seasons. Stable tomato yield is guaranteed from -35°C to 45°C, with energy consumption accounting for only 40-60% of that of a fully closed greenhouse.
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The semi-closed structure reduces CO₂ escape and raises enrichment efficiency by 30-50% versus open greenhouses. The CO₂ concentration inside the greenhouse remains stable at 800-1200ppm, greatly improving photosynthetic efficiency.
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Air inlets are fully covered with over 50-mesh insect screens. Combined with the positive pressure design to prevent infiltration of unfiltered air, it fundamentally reduces pest and disease occurrence and complies with organic planting standards.
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90% of core components are self-manufactured, with CE certification and 15 patents. Custom exclusive environmental control logic and planting schemes are formulated for customers, and a three-level inspection system ensures zero defects upon factory delivery.
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Technical Specifications
| Parameter | Standard Configuration | Optional upgrade |
| Span | 8m,9.6m,12m | Support for customization of various lengths |
| Bay | 4m,8m | Support for customization of various lengths |
| Eave height | 6m | Support for customization of various heights |
| Top Covering | 4mm, 5mm Single layer ordinary tempered glass | 4mm, 5mm Single layer diffuse scattering tempered glass |
| Side Covering |
4mm, 5mm Single layer tempered glass |
5+6+5mm Hollow tempered glass |
| Frame Galvanizing Layer | ≥275g/m2 | Hot-dip galvanized followed by spray coating process |
| Snow Load Resistance | 0.35KN/m2 | 0.3~0.8KN/m2 |
| Wind Load Resistance | 0.38KN/m2 | 0.3~0.8KN/m2 |
| External Shading Screen | Electric black round wire mesh | Customizable with different shading rates |
| Internal Shading Screen | Electric aluminum foil reflective mesh | Customizable with different shading rates |
| Insulation Curtain | Oxford cloth+cotton+Oxford cloth | Upgradeable waterproof surface/Upgradeable foldiable thermal insulation quilt |
| Heating System | Ordinary boiler heating | Finned tubes,warm air blowers, snow melting pipes/ Electric warm air blowers, fuel-fired warm air blowers |
| Cooling method | Chiller Unit | Independent space chiller unit / Planting pipe air supply system |
| Roof Ventilation Method | Electric single-sided ridge rppf window | Electric roof window can be upgraded to double-side per ridge, single-side per ridge, and all-side per ridge |
| Side Ventilation Method | Electric gear side window | Electric lifting side window |
| Control System | Manual electrical control cabinet | IoT intelligent automatic electrical control cabinet Optional mobile online control |
Application and Solutions
Extremely cold in winter，conventional greenhouse vegetable crops will experience irreversible freezing damage.
Extreme High Temperature
Extreme Low Temperature
Excessive Pesticide Residue
High energy cost
Long life design
Extreme High Temperature
Tomato Fruit Setting Failure
With adjustable opening-closing structure, cooling by wet curtain fans and external sunshade, the greenhouse temperature is controlled below 32℃ in hot seasons with stable humidity at 70-85%, ensuring normal fruit setting of tomatoes.
Custom Commercial
Greenhouse Services
As the source production factory, we provide flexible fully customized services:
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The eave height, opening, length, and span can be adjusted as needed, and special customization can be made according to planting needs and geographical features
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Depending on your needs, you can choose from CO2 disinfection system, hanging system, irrigation system, photovoltaic system, heating system, cooling system, fertilization system, hydroponic system, fish and vegetable symbiosis system, ventilation system, shading system
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SAINPOLY Full-Service Support
Our design team will provide CAD construction drawings and load calculation reports based on your local climate, crop type, and budget. Span, eave height, covering material, insulation scheme, and environmental control system can all be customized according to your needs, fully matching your project requirements.
As the source factory, our self production rate reaches 90%. Robot welding, laser cutting, and automatic stamping ensure machining accuracy. Each batch of products strictly follows the three inspection system and has passed multiple verifications such as CE certification and ISO
Engineers go to the site to guide the local team, providing manuals, video tutorials, and daily quality checks.
A professional team is fully responsible for the foundation construction, final debugging, and delivery of a ready to use greenhouse.
Remote troubleshooting and equipment debugging can be resolved remotely through video calls and data analysis. We will gradually guide your local personnel in the operation.
Provide free online training every year to help your team master the latest maintenance techniques and new technologies.
FAQ
1
Q: What are the differences between semi-closed greenhouses, fully closed greenhouses and open greenhouses?
A: The semi-closed greenhouse combines the advantages of the other two types. It opens for ventilation in hot weather and closes for heat preservation in cold weather. Its energy consumption is 40-60% lower than that of fully closed greenhouses, and the environmental control precision is far higher than open greenhouses.
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Q: Can semi-closed greenhouses guarantee tomato production under extreme weather conditions?
A: Yes. Equipped with an adjustable opening-closing structure as well as heating and cooling systems, stable tomato output can be realized under extreme temperatures ranging from -35℃ to 45℃.
3
Q: How is the CO₂ enrichment effect of semi-closed greenhouses?
A: The semi-closed structure reduces CO₂ leakage, raising the enrichment efficiency by 30-50% compared with open greenhouses, and the indoor CO₂ concentration can be stably maintained at 800-1200ppm.
4
Q: Is the energy consumption of semi-closed greenhouses really lower than that of fully closed greenhouses?
A: Yes. Natural ventilation is adopted in non-extreme weather, and mechanical systems are only activated when necessary, cutting energy consumption by 40-60% compared with fully closed greenhouses.
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Q: Do you provide a full set of environmental control commissioning services for semi-closed greenhouses?
A: Yes. Covering control logic programming, sensor calibration and full-working-condition testing, our engineers will complete the overall commissioning on-site and provide hands-on training for operators.
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Q: Does the semi-closed greenhouse meet the certification standards for export markets?
A: Yes. It has obtained CE certification, and all materials comply with EU standards. The positive pressure pest prevention and insect screen filtration design satisfies the facility requirements for organic planting.
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East Section of Paris Road, Qingzhou Economic Development Zone, Weifang City, Shandong Province
Li Jianyong
+86 15006367526
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