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G Seven Agriculture Pvt. Ltd. successfully completed the Supply and Installation of a Combined (Naturally-Forced) Ventilated Polyhouse at the National Agricultural Engineering Research Center (NAERC), Khumaltar, Lalitpur. The project was executed under a National Competitive Bidding (NCB) process and was completed on 2083/03/04.
Developed for agricultural research and technology demonstration, this project introduced an advanced protected cultivation system designed to provide a controlled growing environment suitable for research trials, technology validation, and the evaluation of improved crop production practices.
The project involved the design, supply, and installation of a modern polyhouse equipped with both natural and forced ventilation systems. Unlike conventional greenhouse structures, this facility incorporated an additional overhead structural frame specifically designed to support an external shade net system. This innovative configuration was one of the first of its kind implemented in Nepal, making the project a significant milestone in protected cultivation infrastructure.
The completed facility provides researchers with a versatile environment for conducting experiments under varying climatic conditions while improving environmental control within the growing area.
Client: National Agricultural Engineering Research Center (NAERC)
Location: Khumaltar, Lalitpur
Project Type: Combined Naturally-Forced Ventilated Polyhouse
Procurement Method: National Competitive Bidding (NCB)
Number of Units: 1
Polyhouse Size: 20 m × 28 m
Completion Date: 2083/03/04
The primary objective of the project was to establish a modern research polyhouse capable of supporting advanced agricultural engineering research and protected cultivation technologies. The facility was designed to create a stable growing environment while providing researchers with the flexibility to evaluate different crop management practices, environmental control systems, and production techniques.
The project also aimed to demonstrate innovative greenhouse technologies that could contribute to the future development of protected agriculture in Nepal.
The project included the complete supply, installation, testing, and commissioning of the polyhouse and its associated environmental control systems. Major works included:
l Construction of the galvanized steel polyhouse structure
l Installation of natural and forced ventilation systems
l Installation of exhaust fan systems
l Installation of circulation fans
l Installation of drip irrigation and fogging systems
l Installation of shade net and insect protection systems
l Electrical installation for automated components
l Testing, inspection, and final handover
The completed polyhouse incorporated several advanced engineering features designed to improve environmental control and research capability.
Key Features
l Combined naturally and forced ventilated polyhouse
l Polyhouse size: 20 m × 28 m
l High-capacity exhaust fans
l Air circulation fans
l Manual side roll-up ventilation
l Electric film rolling system
l Integrated gutter system
l External 50% shade net support structure
l Internal aluminum shade screen
l 40-mesh insect net
l Apron plastic protection
l Fogging system
l Drip irrigation system
l Double-door entry system
l Complete piping, filtration, and control accessories
One of the project's most notable engineering features was the additional structural frame constructed above the main polyhouse to support an external shade net system. This design provided enhanced solar radiation management while maintaining structural integrity and operational efficiency. As a research-oriented installation, this innovative approach represented a significant advancement in greenhouse construction practices within Nepal.
Construction activities were carried out through systematic planning, careful material management, and continuous technical supervision. The project progressed from site preparation and structural installation to the integration of environmental control systems and final commissioning.
As with many infrastructure projects, the construction team encountered challenges related to weather conditions during implementation. Through effective scheduling, coordination, and adherence to quality standards, the project was successfully completed and handed over in accordance with the project requirements.
The successful completion of this project has strengthened the research capacity of the National Agricultural Engineering Research Center by providing a modern protected cultivation facility equipped with advanced environmental control technologies.
The installation offers researchers an improved platform for evaluating crop performance, protected cultivation techniques, irrigation management, and climate control strategies under controlled conditions. Furthermore, the project's innovative overhead shade net support system demonstrates an engineering solution that may contribute to the future development of advanced greenhouse technologies in Nepal.
The successful completion of the Combined (Naturally-Forced) Ventilated Polyhouse reflects G Seven Agriculture Pvt. Ltd.'s commitment to delivering technically sound agricultural infrastructure through quality engineering, professional installation, and reliable project execution.
By implementing innovative protected cultivation systems tailored to research requirements, G Seven Agriculture continues to contribute to the advancement of modern agriculture and agricultural engineering in Nepal.
