Types of Greenhouses in India: Fan Pad, Polyhouse, and Net House Explained

Introduction: Why Greenhouses Matter in Modern Agriculture

Agriculture in India is undergoing a major transformation. With increasing climate uncertainty, water scarcity, rising input costs, and the need for consistent crop quality, traditional open-field farming is no longer enough to meet modern demands.

This is where greenhouse farming plays a crucial role.

Greenhouses form the backbone of Controlled Environment Agriculture (CEA), a system that allows farmers to regulate temperature, humidity, light, and airflow to create ideal growing conditions for crops. By reducing dependency on external weather and improving resource efficiency, greenhouses enable year-round production, better yields, and higher-quality produce.

Among the most widely used greenhouse structures in India are:

• Fan Pad Greenhouse
• Polyhouse
• Net House

Each type serves a different purpose, crop requirement, and investment level. Understanding these greenhouse types is essential for farmers, agribusinesses, and stakeholders looking to adopt sustainable and scalable farming practices.

This guide explains all three greenhouse types in detail – how they work, their benefits, limitations, and where they are best used.

What Is a Greenhouse?

A greenhouse is a controlled structure designed to protect crops from external climatic variations while optimizing internal growing conditions. It uses transparent or semi-transparent materials to allow sunlight in while retaining heat and enabling environmental control.

In Controlled Environment Agriculture (CEA), greenhouses are enhanced with:

• Ventilation systems
• Cooling and heating mechanisms
• Humidity and temperature regulation
• Drip irrigation or fertigation systems

Greenhouses can be used for both soil-based cultivation and soilless systems like hydroponics, depending on crop requirements.

Types of Greenhouses Used in India

India’s diverse climate and farming needs have led to the adoption of different greenhouse structures. The most commonly used types are:

1. Fan Pad Greenhouse

2. Polyhouse

3. Net House

Each serves a unique role within modern farming systems.

1. Fan Pad Greenhouse

What Is a Fan Pad Greenhouse?

A Fan Pad Greenhouse is a highly controlled greenhouse structure that uses evaporative cooling to maintain optimal temperature and humidity levels. It consists of:

• Exhaust fans on one side
• Cooling pads (wet pads) on the opposite side

As hot air is pulled out by exhaust fans, fresh air passes through the wet cooling pads, lowering the temperature inside the greenhouse naturally.

This system is widely used in regions with high temperatures, making it ideal for many parts of India.

How Fan Pad Cooling Works

1. Water continuously flows over cooling pads

2. Hot outside air passes through wet pads

3. Air temperature drops due to evaporation

4. Exhaust fans pull cooled air across the greenhouse

5. Uniform cooling is achieved throughout the structure

This creates a stable microclimate for crops.

Crops Suitable for Fan Pad Greenhouses

Fan Pad Greenhouses are ideal for:

• Lettuce and leafy greens
• Capsicum (bell peppers)
• Cucumber
• Tomato (cherry and vine)
• Herbs like basil and parsley

These crops require precise temperature control and consistent growing conditions.

Benefits of Fan Pad Greenhouse

• Strong temperature control even in hot climates
• Enables year-round cultivation
• Improves crop uniformity and quality
• Reduces plant stress
• Ideal for high-value crops

Limitations of Fan Pad Greenhouse

• Higher initial investment
• Requires electricity and water supply
• Regular maintenance of fans and pads
• Skilled management needed

Despite higher costs, fan pad systems are preferred for commercial-scale, premium production.

2. Polyhouse (Naturally Ventilated Greenhouse)

What Is a Polyhouse?

A Polyhouse is a greenhouse structure covered with UV-stabilized polyethylene film. Unlike fan pad systems, polyhouses primarily rely on natural ventilation through side vents and roof openings.

Polyhouses are widely used in India due to their cost-effectiveness and adaptability.

How Polyhouse Ventilation Works

• Hot air rises and escapes through roof vents
• Cooler air enters through side openings
• Shade nets and curtains regulate sunlight
• Manual or semi-automatic controls manage airflow

Polyhouses create a moderately controlled environment suitable for many crops.

Crops Suitable for Polyhouse

Polyhouses are ideal for:

• Capsicum
• Tomato
• Cucumber
• Lettuce
• Herbs
• Flower crops

They support both soil-based and hydroponic cultivation.

Benefits of Polyhouse Farming

• Lower investment compared to fan pad greenhouses
• Suitable for Indian climatic conditions
• Reduced pest and disease exposure
• Improved yield compared to open-field farming
• Easy to scale and replicate

Limitations of Polyhouse

• Limited temperature control in extreme summers
• Dependent on external climate to some extent
• Less precise than fan pad systems

Polyhouses offer an excellent balance between cost, control, and productivity, making them popular among farmers transitioning to modern agriculture.

3. Net House

What Is a Net House?

A Net House is a simple protected structure covered with insect-proof or shade nets instead of plastic film. It does not trap heat but protects crops from pests, excessive sunlight, and wind.

Net houses are widely used as an entry-level protected cultivation system.

How Net House Works

• Nets regulate light intensity
• Prevent insect and pest entry
• Allow natural airflow
• Reduce wind damage

Net houses do not control temperature but significantly improve crop protection.

Crops Suitable for Net House

Net houses are commonly used for:

• Leafy vegetables
• Herbs
• Nursery plants
• Flowers
• Seasonal vegetables

They are ideal for crops that do not require strict climate control.

Benefits of Net House

• Low installation cost
• Minimal maintenance
• Reduces pesticide usage
• Improves crop quality
• Suitable for small and medium farmers

Limitations of Net House

• No temperature control
• Limited protection against heavy rains or cold
• Seasonal dependency remains

Net houses serve as a stepping stone toward advanced greenhouse systems.

Comparison of Greenhouse Types

Feature	Fan Pad Greenhouse	Polyhouse	Net House
Climate Control	High	Medium	Low
Investment	High	Medium	Low
Crop Quality	Very High	High	Moderate
Water Efficiency	High	Medium	Medium
Year-Round Farming	Yes	Mostly	Limited
Suitable For	Commercial B2B	Scalable Farms	Small Farmers

Choosing the Right Greenhouse Type

The choice of greenhouse depends on:

• Crop type
• Budget
• Climatic conditions
• Production scale
• Market requirements

Many modern farms use a combination of greenhouse types to balance cost and efficiency.

Role of Greenhouses in Controlled Environment Agriculture (CEA)

Greenhouses are not standalone structures, they are part of a larger CEA ecosystem that integrates:

• Precision irrigation
• Nutrient management
• Environmental monitoring
• Data-driven decision-making

CEA enables predictable farming outcomes and supports sustainable food systems.

How Nature Harvest Farms Uses Greenhouse Technology

At Nature Harvest Farms, greenhouse selection is based on crop requirements and sustainability goals. By combining fan pad systems, polyhouses, and protected cultivation, NHF ensures:

• Efficient resource utilization
• Consistent crop quality
• Year-round availability
• Reduced environmental impact

This flexible approach allows NHF to grow premium produce while supporting scalable and responsible agriculture.

Future of Greenhouse Farming in India

As India moves toward food security and sustainability, greenhouse farming will play a critical role by:

• Conserving water
• Reducing climate risks
• Supporting farmer incomes
• Meeting B2B quality standards
• Enabling urban and peri-urban farming

Greenhouses are no longer optional, they are essential infrastructure for future-ready agriculture.

Conclusion: Greenhouses as the Foundation of Modern Farming

Fan Pad Greenhouses, Polyhouses, and Net Houses each serve a unique purpose within India’s agricultural ecosystem. Together, they form a strong foundation for Controlled Environment Agriculture.

By choosing the right greenhouse structure, farmers and agribusinesses can grow smarter, reduce risks, and deliver consistent, high-quality produce while protecting natural resources.

Greenhouse farming is not just about growing crops; it’s about building resilient, sustainable food systems for the future.

Explore how Nature Harvest Farms implements Controlled Environment Agriculture to deliver consistent, high-quality produce while supporting sustainable farming practices.

Contact Nature Harvest Farms.