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Naturally Ventilated Polyhouse: High-Yield GI Pipe Greenhouse Structure

Naturally ventilated polyhouse (NVPH) structure for commercial hydroponic and protected cultivation farming in India
Naturally Ventilated Polyhouse: High-Yield GI Pipe Greenhouse Structure
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BEST CROPS FOR NATURALLY VENTILATED POLY HOUSE
Crop CategoryBest Crops
Vegetables                                 Capsicum, Tomato, Cucumber, Chilli
Leafy GreensLettuce, Spinach, Coriander, Basil
FruitsStrawberry, Muskmelon
FlowersGerbera, Carnation, Rose
Exotic CropsColored Capsicum, Cherry Tomato

The Inhydro Naturally Ventilated Polyhouse is a professional-grade protected cultivation solution designed to provide an optimal micro-climate without the need for expensive cooling systems. Engineered with a robust GI (Galvanized Iron) pipe frame, this structure utilizes a passive airflow design to naturally regulate temperature and humidity. It is fully NHB and MIDH compliant, making it the perfect choice for farmers seeking government subsidies. With high-quality UV-stabilized poly-film and insect-proof netting, it ensures your crops remain protected from extreme weather and pests, delivering a consistent, year-round harvest.

Rate -: 840 Per/SQ.M

Government Approved Subsidy Price List (Click to View)
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NHB TECHNICAL REQUIREMENTS – NATURALLY VENTILATED POLYHOUSE
ParameterNHB Technical Requirement
Structure TypeNaturally Ventilated Polyhouse
Structural ShapeGable / Arch Type Design
Frame MaterialHot Dip Galvanized (HDG) Steel Pipes
Galvanization ThicknessMinimum 300 GSM Zinc Coating
Design Life (Structure)15–20 Years
WeldingWelding not permitted (except base plate)
Wind Load Resistance100–120 km/hr (as per wind zone)
Grid Size / Bay Spacing4 × 4 meters (Standard)
Column Spacing4 meters
Height4–6 meters (depending on design)
Cladding Material200 Micron UV Stabilized Poly Film
Ventilation TypeNatural Side & Top Ventilation with Insect Net
Shade Net (Optional)35%, 50% or 75% (if required)
Fastening SystemAluminum Profile with Zig-Zag Spring
Drainage SystemGutter & Proper Rainwater Outlet System

Inhydro delivers reliable and performance-driven hydroponics and polyhouse farming solutions designed to significantly enhance farm productivity and long-term profitability. We specialize in developing durable, high-quality structures that are engineered for Indian climatic conditions, ensuring stability, strength, and consistent performance throughout the year.

  • Customized Farming Solutions: Tailor-made polyhouse and hydroponic systems based on crop type, land size, and budget.

  • High-Quality Materials: Strong GI structures, UV-stabilized sheets, and durable components built for long-term use.

  • Improved Crop Yield & Quality: Optimized growing environment for better productivity and premium-grade produce.

Project Gallery: NHB-Approved Shade Net House Installations

    • Standard sizes with indicative pricing as per government benchmark rates

    The pricing mentioned below is based on the government approved benchmark rate for Dome Shape Shade Net House as prescribed under NHB and respective State Horticulture Department guidelines. The approved rate of ₹700 per square meter is applicable for protected cultivation structures constructed through empanelled agencies and includes the complete development of the shade net house.

    Size (Sq.M) Approx. Area Rate (₹/Sq.M) Total Price (₹) Subsidy (%)
    2000 Sq.M ~0.5 Acre ₹690 ₹8,80,000 Up to 50%
    4000 Sq.M ~1 Acre ₹690 ₹17,60,000 Up to 50%
    8000 Sq.M ~2 Acres ₹690 ₹35,20,000 Up to 50%

    Description

    Increase Your Farming Profit with Naturally Ventilated Polyhouse (NVPH)

    A Naturally Ventilated Polyhouse (NVPH) is not just a structure — it is a profit-generating farming system. By creating a controlled growing environment, NVPH allows farmers to grow high-value crops throughout the year and sell produce when market prices are highest.

    Instead of depending on seasonal rainfall and unpredictable weather, you get a protected cultivation system that gives you stability, consistency, and higher returns.

    How NVPH Helps You Increase Profit

    1️⃣ Higher Yield per Acre

    With controlled temperature and humidity, crops grow faster and healthier. Farmers typically experience 2x to 4x higher production compared to open-field farming.

    2️⃣ Off-Season Farming Advantage

    You can grow crops like capsicum, cucumber, tomato, and flowers even during off-season. Off-season produce sells at premium market rates, increasing your margin significantly.

    3️⃣ Better Quality = Better Price

    Protected cultivation reduces pest attack and crop damage. Uniform size, color, and quality help you supply to:

    • Supermarkets

    • Export markets

    • Bulk buyers

    • Hotels & restaurants

    Better quality always means better selling price.

    4️⃣ Reduced Risk from Weather

    Heavy rain, hailstorm, strong wind, and extreme sunlight damage open crops. NVPH protects your investment and reduces financial risk.

    5️⃣ Water & Fertilizer Efficiency

    With drip irrigation and fertigation systems, you reduce wastage and increase nutrient efficiency. Lower input cost + higher output = higher net profit.

    6️⃣ Government Subsidy Support

    Under MIDH / State Horticulture schemes, you may get up to 50% subsidy, reducing your initial investment and increasing return on investment (ROI).

    Additional information

    Weight 15 kg
    Panel Material

    High-quality UV-stabilized Polypropylene (PP)
    Panel Size

    396 mm (L) × 150 mm (H) × 116 mm (D)
    Pot Size

    122 mm × 80 mm × 80 mm
    Plant Capacity

    3 plants per panel
    Plant Density

    5 plants per sq. ft.
    Configuration

    Modular, expandable, wall-mounted or free-standing
    Watering System

    Integrated drip irrigation with nutrient recirculation
    Vertical Wall Garden

    18 Planter, 27 Planter, 36 Planter

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    Additional Technical Specifications & Government Compliance Standards

    The Inhydro NVPH Polyhouse (Naturally Ventilated Polyhouse) is designed and manufactured in strict accordance with the technical guidelines prescribed by the National Horticulture Board (NHB) and the Mission for Integrated Development of Horticulture (MIDH). Every structural component, including the Hot-Dip Galvanized (HDG) steel framework, ventilation system, and UV-stabilized covering material, is engineered to meet government-approved specifications. This ensures high structural reliability, long service life, optimal crop protection, and eligibility for subsidy schemes under approved horticulture programs. Designed specifically for Indian agro-climatic conditions, the Inhydro NVPH Polyhouse delivers durability, performance, and compliance with national protected cultivation standards.

    Key Compliance Points:

    • HDG (Hot-Dip Galvanized) steel structure with prescribed micron coating thickness

    • Wind load and structural design as per government-approved standards

    • UV-stabilized polyethylene film as per NHB specifications

    • Proper roof and side ventilation system for natural airflow

    • Foundation and column spacing as per subsidy norms

    1️⃣ STRUCTURAL PIPE SPECIFICATIONS (CRITICAL FOR SUBSIDY)
    Structural Member Pipe OD Thickness Material Remarks
    Main Columns 60 mm 2.0 – 2.5 mm HDG Stee Primary load bearing, wind resistant structure
    Foundation Insert Pipe 60 mm 2.5 mm HDG Steel Embedded in RCC footing (1–1.5 m depth typical)
    Roof Arches 48 mm 2.0 mm HDG Steel Supports polyfilm covering
    Ridge Pipe 42 mm 2.0 mm HDG Steel Top structural alignment & stability
    Roof Purlins 42 / 48 mm 2.0 mm HDG Steel Polyfilm & shade net support
    Side Purlins 42 mm 2.0 mm HDG Steel Lateral reinforcement
    Cross & Wind Bracing 33 mm 2.0 mm HDG Steel Wind load resistance (120–150 km/h zone dependent)
    Curtain Runner Pipe 42 mm 2.0 mm HDG Steel Manual/automatic roll-up ventilation system
    2️⃣ Pipe & Coating Standards
    Parameter Standard
    Pipe Type Circular Hot Dip Galvanized Steel Pipes (IS 1161)
    Galvanization Hot Dip Galvanized as per IS 4759:2019
    Zinc Coating 275 GSM
    Jointing Method Nut–Bolt & Clamp System (GI Hardware)
    Welding Not permitted in main structural members
    3️⃣ Shade Net Specifications
    Parameter Specification
    Material UV Stabilized HDPE Knitted Fabric
    Shade Factor 50%
    Roof Net GSM 120 GSM
    Side Net GSM 100 GSM
    UV Life 5 Years (UV Stabilized)
    4️⃣ Foundation & Civil Works
    Item Specification
    Foundation Type RCC Footing with Reinforcement
    Concrete Grade M20
    Depth 750 mm
    Purpose Wind & structural load stability
    5️⃣ Scope of Supply & Installation
    Item Status
    Structure & erection ✅ Included with complete fabrication
    Shade net supply & fixing ✅ Included with UV stabilized net
    Civil foundation work ✅ Included with RCC footing
    Inspection & subsidy readiness ✅ Included with documentation support
    6️⃣ Exclusions
    Item Status
    Planting material ❌ Not Included in project cost
    Fertilizers & pesticides ❌ Not Included in project cost
    Electricity & water ❌ Not Included in project cost

    What is a Naturally Ventilated Polyhouse (NVPH) and how does it work?

    A Naturally Ventilated Polyhouse (NVPH) is a protected cultivation structure covered with UV-stabilized polyethylene film and designed with top and side ventilation openings. It works on the principle of natural airflow — hot air rises and exits through roof vents, while fresh air enters through side vents. This creates a balanced microclimate inside the structure without relying heavily on mechanical cooling systems. NVPH structures are widely used in India for high-value vegetable and flower cultivation due to their cost-effectiveness and energy efficiency.

    What is the cost of an NVPH Polyhouse in India?

    The cost of an NVPH Polyhouse in India generally ranges between ₹700 to ₹1,200 per square meter depending on factors such as structural design, height, film thickness, wind load capacity, and location. The final price also varies based on optional systems like drip irrigation, fogging, insect netting, and foundation type. Farmers can significantly reduce their investment cost by availing government subsidies under horticulture schemes.

    Is NVPH Polyhouse eligible for government subsidy?

    Yes, NVPH Polyhouses constructed as per the technical standards of the National Horticulture Board(NHB) and Mission for Integrated Development of Horticulture (MIDH) are eligible for government subsidy, subject to state approval and compliance verification. The structure must meet prescribed specifications such as HDG steel pipe thickness, micron zinc coating, approved design dimensions, and UV film standards. Subsidy percentage varies by state and farmer category.

    What crops can be grown in an NVPH Polyhouse?

    An NVPH Polyhouse is ideal for cultivating high-value and off-season crops such as Capsicum, Tomato, Cucumber, Strawberry, Gerbera, Rose, and leafy vegetables. It is particularly beneficial for crops that require controlled temperature and humidity conditions. The structure enhances yield, improves quality, and allows farmers to supply produce during off-season periods when market prices are higher.

    What crops can be grown in an NVPH Polyhouse?

    An NVPH Polyhouse is ideal for cultivating high-value and off-season crops such as Capsicum, Tomato, Cucumber, Strawberry, Gerbera, Rose, and leafy vegetables. It is particularly beneficial for crops that require controlled temperature and humidity conditions. The structure enhances yield, improves quality, and allows farmers to supply produce during off-season periods when market prices are higher.

    What is the lifespan of an NVPH Polyhouse?

    A well-constructed NVPH Polyhouse made with Hot-Dip Galvanized (HDG) steel typically lasts 15–20 years due to its corrosion-resistant properties. The polyethylene film covering generally has a lifespan of 3–5 years depending on UV quality and maintenance. Proper installation and periodic inspection significantly extend the overall life of the structure.

    What is the difference between NVPH and a Shade Net House?

    The main difference lies in environmental control. An NVPH Polyhouse uses UV-stabilized plastic film to create a semi-controlled microclimate, making it suitable for high-value vegetable and flower cultivation. A Shade Net House uses HDPE shade net fabric primarily to reduce sunlight intensity and is commonly used for nurseries and low-cost cultivation. NVPH provides better protection against rain, pests, and extreme weather conditions compared to a Shade Net House.

    How much wind speed can an NVPH Polyhouse withstand?

    An NVPH Polyhouse designed as per government-approved structural calculations can withstand region-specific wind loads. The structure includes proper foundation anchoring, arch spacing, and HDG steel framework to ensure stability. Wind resistance depends on design specifications and agro-climatic zone classification.

    Does an NVPH Polyhouse require electricity?

    Basic NVPH structures rely on natural ventilation and do not require continuous electricity for cooling. However, optional systems such as drip irrigation pumps, fogging systems, and automated controls may require power depending on the farmer’s setup.

    What thickness of polyethylene film is used in NVPH Polyhouse?

    NVPH Polyhouses generally use 200 micron UV-stabilized polyethylene film as per government guidelines. This thickness ensures durability, high light transmission, and resistance against harsh sunlight and weather conditions. The film also helps maintain internal temperature and humidity levels suitable for high-value crop production.

    What thickness of polyethylene film is used in NVPH Polyhouse?

    NVPH Polyhouses generally use 200 micron UV-stabilized polyethylene film as per government guidelines. This thickness ensures durability, high light transmission, and resistance against harsh sunlight and weather conditions. The film also helps maintain internal temperature and humidity levels suitable for high-value crop production.

    How much income can be generated from an NVPH Polyhouse?

    Income from an NVPH Polyhouse depends on crop selection, market demand, and management practices. High-value crops like capsicum, cucumber, and gerbera flowers can generate significantly higher returns compared to open-field farming. With proper crop planning and market linkage, farmers can achieve better yield per square meter and improved profitability through off-season cultivation.

    How long does it take to install an NVPH Polyhouse?

    Installation time for an NVPH Polyhouse generally ranges from 20 to 45 days depending on the project size, foundation type, and site conditions. Proper land leveling, foundation work, and structural assembly are crucial to ensure long-term durability and compliance with subsidy inspection norms.

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