Top Ducting Solutions for Greenhouse Ventilation

If you’re a greenhouse grower, you already know how crucial the right environment is for your plants. Light, water, and soil quality often take centre stage in conversations about healthy crops, but there’s one thing that might not get as much attention—ventilation. Without proper airflow, even the best setup can fall short, leading to poor plant growth, reduced yields, and even plant diseases.

When considering greenhouse ventilation, you might imagine fans, windows, or vents. But another critical piece of the puzzle is the ducting system, which can make or break how efficiently air circulates through your space. In this blog, we’ll discuss the different ducting solutions available for greenhouses and why they matter. Whether you’re just starting or looking to upgrade an existing system, this guide will walk you through everything you need to know about choosing the right ducting.

Let’s explore the world of ducting solutions and how each option can help you optimise ventilation for a healthy and productive greenhouse.

Why Greenhouse Ventilation Matters

Before we get into specific ducting solutions, it’s important to understand why ventilation is so important for your greenhouse. Essentially, proper ventilation does three critical things:

1. Regulates Temperature: Without airflow, greenhouses can quickly overheat. While plants thrive in warm environments, too much heat can damage their growth.
2. Controls Humidity: Excess humidity can cause mould, mildew, and plant diseases. A good ventilation system helps control moisture levels and maintain the right humidity for your crops.
3. Supplies Fresh Air and CO2: Plants need CO2 to photosynthesise. Ventilation brings fresh air, ensuring that CO2 levels remain optimal for plant growth.

Whether you’re growing vegetables, flowers, or herbs, maintaining the right balance of temperature, humidity, and fresh air is crucial. A well-designed ducting system can help you achieve this balance, no matter the size or layout of your greenhouse.

Rectangular Ductwork: Maximise Space and Efficiency

Starting with a heavy hitter—rectangular ductwork is a tried-and-true solution for greenhouses, especially larger operations. It’s particularly useful if you have multiple growing zones or a large space to ventilate. One of the main benefits of rectangular ductwork is its space-saving design. Because it can fit snugly along walls, ceilings, or tight spaces, it maximises the available area in your greenhouse, leaving more room for your plants.

But it’s not just about saving space—rectangular ducting is also efficient. The large surface area allows for the movement of high volumes of air, which is essential for larger greenhouses where airflow can sometimes get uneven.

Key Benefits:

• Space-Saving: Its flat shape allows it to be tucked away along walls or under ceilings.
• Efficient Airflow: Designed to move large volumes of air, making it ideal for big greenhouses or multiple zones.
• Durable: Made from robust materials, this type of ducting can withstand the moisture-heavy environment of a greenhouse without rusting or corroding.

If you’re running a commercial greenhouse or one with multiple growing areas, rectangular ductwork is an excellent solution. It provides consistent airflow throughout the space, ensuring that every corner of your greenhouse gets the ventilation it needs.

Flexible Ductwork: The Ultimate Problem Solver

If you have a more complex or smaller greenhouse layout, flexible ductwork is a fantastic option. Unlike rectangular ducts, which are rigid and fixed, flexible ducting can be bent, twisted, and stretched to fit just about anywhere. That makes it the perfect solution for greenhouses with unusual layouts or obstacles like irrigation systems, plants, or structural supports.

Imagine you have a winding greenhouse with various plants, shelves, or water systems in the way—flexible ducting can easily navigate those spaces without requiring any major adjustments to your setup. It’s made from lightweight, bendable materials, so it’s not just versatile—it’s also incredibly easy to install.

Why Choose Flexible Ductwork?

• Adaptable: It’s perfect for tight, irregular spaces or those with multiple zones requiring separate ventilation.
• Quick Installation: There is no need for custom fabrication or complicated fittings. You can install flexible ducting quickly.
• Lightweight: Since it doesn’t put much strain on structural supports, flexible ductwork is ideal for hanging overhead systems without additional bracing.

Flexible ductwork works well if you need a quick, easy solution that fits wherever you need it. Its adaptability also makes it a good choice for greenhouses that are still growing or evolving—if you move things around or expand, you can easily adjust the ductwork without replacing everything.

Spiral Ductwork: Perfect for Long Runs

For larger greenhouses where air needs to be moved over long distances without losing efficiency, spiral ductwork is a top-tier choice. These ducts are made of galvanised or stainless steel and have a smooth, cylindrical shape that minimises air resistance. This means that even if the air has to travel across a long stretch of ducting, it maintains its speed and pressure, ensuring consistent ventilation throughout your greenhouse.

Because of its durability, spiral ductwork is also a long-lasting investment. The materials are typically resistant to corrosion, which is essential in the humid environment of a greenhouse. Plus, its sleek look can even add a bit of aesthetic appeal to your setup—if you’ve got an open layout where the ducting is visible, spiral ducts can give it a professional, industrial vibe.

Advantages of Spiral Ductwork:

• Smooth Airflow: The spiral design reduces friction, allowing air to move freely through the duct without losing pressure.
• Durable Materials: Resistant to corrosion, making it ideal for humid environments like greenhouses.
• Ideal for Long Runs: When air needs to be moved across a large area efficiently, spiral ductwork is the solution.

Spiral ductwork is great for greenhouses where air needs to be transported across large distances without sacrificing efficiency or energy use. If you’re looking for a solution that’s built to last, this is definitely worth considering.

Ventilation Fans: The Power Behind Effective Airflow

While ducting is essential for distributing air throughout your greenhouse, ventilation fans are the driving force behind that airflow. Without fans, even the most well-designed ducting system won’t be able to move air efficiently, leaving your plants vulnerable to overheating or insufficient CO2 levels. Choosing the right fan setup is just as important as selecting the right ductwork, as both work together to create an ideal growing environment.

When paired with the right ducting system, ventilation fans can significantly boost the efficiency of your greenhouse’s airflow. Ducts help direct the air exactly where it’s needed, minimising the risk of over-ventilation in some areas and under-ventilation in others. The combination of properly sized and placed fans with well-designed ductwork ensures that your greenhouse maintains an optimal climate, even in extreme weather conditions.

Fixings, Sealings, and Jubilee Clips

Ducting might be the star of your greenhouse ventilation system, but it won’t perform well unless it’s properly supported. That’s where fixings, sealants, and Jubilee clips come in. These components are essential to make sure everything is securely connected, preventing air leaks and ensuring your ventilation system runs efficiently.

Let’s start with fixings—these are the brackets, hangers, and clips that hold your ducting in place. Without them, your ducts might shift over time, which can cause airflow to become uneven. Fixings also make sure your ducts are securely attached to your greenhouse structure, whether that’s on walls, ceilings, or even suspended overhead.

Sealants are equally important. They’re used to create airtight seals at the joints and connections between different duct segments. Without proper sealing, air can escape, reducing the overall efficiency of your system and making it harder to maintain the right temperature and humidity levels.

And finally, Jubilee clips are perfect for securing flexible ductwork. These metal clamps tighten around the duct, keeping it securely in place. The beauty of Jubilee clips is that they can be adjusted easily, making it simple to make tweaks or adjustments to your system as needed.

Why They Matter:

• Fixings: Keep your ductwork securely in place and prevent movement or sagging.
• Sealants: Ensure airtight connections between duct segments, preventing energy loss and maintaining consistent airflow.
• Jubilee Clips: Ideal for securing flexible ducting, they make adjustments quick and easy.

These small components are essential to the success of any ducting system. They help ensure that your system works efficiently, without leaks or drops in air pressure.

Louvres and Grilles: Direct and Control Your Airflow

While ducting is crucial for moving air around your greenhouse, it’s the louvres and grilles that control where that air goes and how much of it gets in or out. Louvres are essentially adjustable vents that can be opened or closed to control airflow. This allows you to direct airflow where it’s needed most and to adjust ventilation levels based on the current temperature, humidity, or plant needs.

Grilles, on the other hand, are protective covers that prevent debris, pests, or even small animals from entering your ducting system. While they might seem like minor components, they play an important role in keeping your ventilation system running smoothly and free from blockages or damage.

Why You Need Louvres and Grilles:

• Control Airflow: Louvres allow you to fine-tune the amount of air entering or exiting different parts of your greenhouse.
• Protect Your System: Grilles keep out debris and pests, protecting your ductwork from potential damage.
• Optimise Climate Control: Use louvres to adjust ventilation based on changing greenhouse conditions, ensuring your plants always have the ideal environment.

By strategically placing louvres and grilles throughout your greenhouse, you can create a more dynamic, controlled airflow system that adapts to your crops’ needs.

Get Expert Help and Top-Quality Products with AMS Ducting

At AMS Ducting, we understand that every greenhouse is unique, and that’s why we offer a comprehensive range of ducting solutions tailored specifically to your needs. Whether you’re looking for space-efficient rectangular ductwork, adaptable flexible ducts, or durable spiral ducting, we’ve got it all—and more. Our product range includes everything you need to build a robust and efficient ventilation system, from fixings and sealants to Jubilee clips, louvres, and grilles.

But it’s not just about the products. At AMS Ducting, our expert team is here to guide you through the process, ensuring you get the right solutions to optimise airflow, control humidity, and maintain the perfect growing conditions for your plants. No matter the size or complexity of your greenhouse, our team is ready to help you design a system that will keep your crops healthy and thriving all year round.

Ready to improve your greenhouse ventilation? Contact AMS Ducting today and let us help you create the ideal environment for your plants. From consultation to installation, we’re here every step of the way!