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A naturally ventilated polyhouse is a type of greenhouse structure that relies on natural airflow to regulate the internal environment, rather than using mechanical ventilation systems. It is designed to create an optimal growing environment for various crops by utilizing natural ventilation methods such as side and roof vents. This type of polyhouse helps maintain appropriate temperature, humidity, and carbon dioxide levels, which are crucial for healthy plant growth.

Structural Design:

  • Frame: Usually made of galvanized steel or aluminum to provide strength and resistance to corrosion.
  • Covering Material: UV-stabilized polyethylene film is commonly used for the covering, which allows for good light transmission while protecting plants from harsh weather conditions.

Ventilation:

  • Side Vents: These are typically roll-up or drop-down vents located along the sides of the polyhouse. They can be manually or automatically operated.
  • Roof Vents: Ridge or roof vents at the top of the structure allow hot air to escape, facilitating natural convection.
  • End Vents: Often found on the gable ends, these vents can be opened to improve cross-ventilation.

Climate Control:

  • Temperature Regulation: By opening and closing the vents, the internal temperature can be controlled without the need for fans or other mechanical systems.
  • Humidity Control: Natural ventilation helps in maintaining appropriate humidity levels, reducing the risk of diseases caused by excess moisture.

Cost-Effective:

  • Naturally ventilated polyhouses are generally less expensive to build and operate compared to those with mechanical ventilation systems.
  • Lower energy consumption as no electricity is required for ventilation.

Sustainable:

  • Utilizes natural airflow, making it an environmentally friendly option.
  • Reduces reliance on non-renewable energy sources.

Crop Suitability:

  • Suitable for a wide range of crops, especially those that thrive in moderate temperature and humidity conditions.
  • Commonly used for growing vegetables, flowers, and certain fruits.

Ease of Maintenance:

  • Fewer mechanical parts means less maintenance and lower repair costs.
  • Simple operation, often requiring manual adjustments to the vents.

Customization:

  • Can be designed and customized to suit specific climatic conditions and crop requirements.
  • Various sizes and shapes are available to meet different agricultural needs.
  1.   Environmental Harmony: Naturally ventilated polyhouses are ideal for sustainable agriculture as they minimize reliance on artificial climate control systems, reducing energy consumption and carbon footprint. By utilizing natural airflow, they create an eco-friendly environment for plant growth.
  2.   Adaptability: These structures are suitable for a wide range of climates, from temperate to tropical regions. Their design allows for easy adjustment to varying environmental conditions, ensuring optimal growth conditions for different crops.
  3.   Cost-Effectiveness: Compared to conventional greenhouses with mechanical ventilation, naturally ventilated polyhouses offer cost savings in terms of construction, operation, and maintenance. They provide an affordable solution for small-scale farmers and rural communities.
  4.   Versatility: Naturally ventilated polyhouses accommodate various types of crops, from vegetables and fruits to flowers and herbs. Their adaptable design allows for the cultivation of diverse plant species, maximizing productivity and yield potential.
Product NameNaturally Ventilated Polyhouses
Roof Type  Single vent  
Available Size500m2/1000m2 / 2000m2 / 4000m2  
Grid8m x 4m
Side / Center Height4.0m / 6.5m
Hockey2m
Top Ventilation0.8 to 1.0 m
Side Ventilation3.5 M to 4.0 M
Side coveringInsect net, 110 GSM with Apron Sheet
Top Covering200 Micron Polyfilm, shade net for second layer
Second layerInside Sliding net Cover Available.
Trellising System5mm ,4mm rope wire with 3mm plastic wire
Drip IrrigationInline drip irrigation system, fogging or Sprinkler with filters
Young plants growing in very large plant commercial greenhouse