Low Cost Tunnel Single Span Passive Solar Blackout Greenhouse. Customizable Dimensions: Length, span width, side wall, apex height, and spacing can be customized to specific requirements. Flexible Cover Materials: Options include PE/PO thin film and polycarbonate sunshine board based on customer needs. Complete System Integration: Equipped with blackout, cooling, shading, and ventilation systems for optimal climate control. Durable Steel Structure: Constructed with hot galvanized steel frames and heat invasion galvanized pipes for longevity. Versatile Application: Ideal for cultivating vegetables, fruits, and flowers while resisting natural disasters. Efficient Ventilation: Features top and side ventilation options, with customization available for specific designs. Cost-Effective Design: Simple, practical, and easy to construct single-span tunnel greenhouse solution. Global Export Experience: Products exported to over 20 countries including USA, Europe, and Africa with high praise.