When it comes to industrial ventilation, the “heart” of your system is the fan. Many facility managers assume that any fan will do, provided it is powerful enough. However, in the world of industrial ductwork, choosing between a Centrifugal Fan and an Inline Fan is a decision that dictates your energy costs, your noise levels, and the long-term reliability of your extraction system.
The Centrifugal Advantage
Centrifugal fans are the heavy lifters of the industry. They work by using an impeller to draw air into the fan inlet and change the direction of the airflow by 90 degrees, discharging it at high pressure.
When to choose them:
High-Resistance Systems: If your ductwork layout is complex—with many bends, dampers, filters, or scrubbers—you need high static pressure. Centrifugal fans excel here.
Corrosive Environments: Because we can manufacture the housing and impeller from specialist plastics like Polypropylene or PVDF, the entire unit remains immune to the harsh chemicals that would seize a standard metal fan.
Longevity: These fans are robust. In high-demand environments, they provide a consistent, reliable extract that is built to endure continuous operation.
The Case for Inline Fans
Inline fans (often mixed-flow or axial-based designs) are the “compact specialists.” They move air in a straight line, parallel to the shaft, which makes them incredibly efficient for direct, low-resistance runs.
When to choose them:
Space Constraints: If you are retrofitting a system into a tight ceiling void or a congested plant room, an inline fan is your best friend. They are compact and integrate seamlessly into the duct line.
Energy Efficiency: For systems that require high volume but relatively low pressure, inline fans are often the more energy-efficient choice.
Simpler Installations: They are generally easier to install and can be mounted directly into existing ducting, making them ideal for quick upgrades or supplemental ventilation.
The “Plastica” Approach: Precision Sizing
The biggest mistake we see in the UK industrial sector is “oversizing.” Many companies install a fan that is far more powerful than required, “just to be safe.” This leads to excessive energy bills, unnecessary vibration, and premature wear on the ductwork.
At Plastica Technologies, our approach is data-driven. We calculate your system’s total pressure drop based on the physical length, the number of bends, and the specific resistance of your duct material. By matching the fan’s performance curve to your actual facility needs, we ensure you achieve the required air change rates without wasting a single kilowatt.
Are you running a system that is either too loud or under-performing? Often, the issue isn’t the ducting—it’s the fan. Let’s look at your system’s performance curve. Contact us for an expert site assessment.
