What Exactly Is Ductwork?

Whether you’re managing a commercial fit-out or wondering why your office is too hot in one corner and freezing in another, the word “ductwork” probably crops up more than you’d expect. But what is ductwork exactly, and why does it matter?

What Is Ductwork?

In the simplest terms, ductwork refers to the network of tubes often made from galvanised steel, aluminium, or flexible plastic, that transports air around a building.

These systems are a core part of your heating and ventilation (HVAC) setup, moving warm or cool air from one place to another.

Think of it as the building’s bloodstream. Your HVAC unit pumps out conditioned air, and the ductwork carries it where it needs to go, into rooms, through vents, and back again. If it’s designed and installed well, you won’t notice it. But if something’s off? You’ll feel it.

Why Are Ductwork Systems Important?

It’s easy to underestimate ductwork until there’s a problem. Maybe some rooms are too warm, others too cold, or you’ve got air quality complaints from staff. In many cases, it’s not the HVAC unit that’s at fault, it’s the ducts.

Good ductwork installations are crucial because:

They distribute air evenly, improving comfort and energy efficiency.
They help maintain healthy air quality by filtering and moving air properly.
They minimise energy loss, keeping running costs down.
They’re essential for compliance with building regulations.

Poorly designed or maintained ductwork can cause airflow restrictions, waste energy, and create a breeding ground for dust, mould, and airborne pollutants.

What’s Included In A Ductwork System?

A full ductwork system typically includes:

Duct & Branches: These are the main channels that carry air through the building.
Plenums: Chambers that collect air from the HVAC unit and distribute it into ducts.
Supply & Return Grilles: Vents where air enters or exits a space.
Volume Control Dampers: Devices that regulate or shut off airflow.
Insulation: Helps maintain temperature and reduce energy loss.
Access Points: Allow for maintenance and cleaning of internal components.

Each component has a job to do. If one fails, the whole system can suffer.

What Materials Are Used?

Most commercial ductwork is built from galvanised steel, durable, rust-resistant, and fire-safe. Aluminium is lighter and easier to install in tight spaces, while fibreglass ducts offer built-in insulation for improved efficiency.

Flexible ducting is often used in smaller or awkward installations, though it’s less durable long-term. Choosing the right material depends on your building type, budget, and usage.

What Should You Consider Before Installation?

Before any ductwork is installed, we always ask the same question: what’s this system actually for?

Every building has different needs. We look at:

Available installation space
Required airflow and system pressure
Temperature control zones
Energy efficiency targets
Air quality and hygiene standards
Fire safety compliance

Poor layout or undersized ductwork can create ongoing headaches. That’s why we design around the building, never the other way round.

How Long Does Ductwork Last?

With proper installation and regular maintenance, ductwork can last 10-15 years. Over time, joints can loosen, insulation can degrade, and ducts can become clogged with debris. That’s why we recommend routine inspections and cleaning.

If your ducts are visibly damaged, leaking, or you’re noticing poor airflow and rising energy bills, it might be time for a service, or even replacement.

Ductwork Maintenance and Cleaning

At ACB, we don’t just install ductwork, we keep it running at its best. Our maintenance services ensure airflow stays consistent, energy use stays efficient, and indoor air stays clean. We check for leaks, blockages, and performance issues before they become costly problems.

Need a new ductwork system or just not sure what your current one’s doing?

Our team at ACB is here to help. From design and installation to routine cleaning, we provide tailored solutions for commercial and industrial buildings across the UK.