Activated Carbon Filter (ACF) – Odor Filter for Exhaust Systems Ø100–Ø200 mm

Activated Carbon Filters (ACF): Reliable Odor Neutralization

An activated carbon filter (ACF) is the simplest way to keep exhaust air discreet and pleasant: the fan draws air through the carbon bed, odor molecules are bound – and significantly cleaner air is released outside. In this category, you'll find everything from compact micro-solutions to powerful inline odor filters in common sizes.

  • Select Ø: Match the filter to the hose/fan (e.g., 100/125/150/200 mm).
  • Match m³/h: It's better to size appropriately and not force air through the filter "too quickly."
  • Use pre-filter: A clean pre-filter fleece extends service life and keeps dust away.

Matching accessories: Exhaust Fans · Ducting · Connectors · Intake Filters · Climate Control

How to find the right activated carbon filter (without making a bad purchase)

The most common reason for "smell still coming through" is not bad carbon – but a mismatched setup. For your activated carbon filter to work reliably, the following must match:diameter, airflow, and resistance(hose, bends, pre-filter).

1) Diameter: Ø100, Ø125, Ø150, or Ø200?

The Ø determines what hose and fan will fit – and how smoothly the air can flow. Larger diameters are often easier to "get quiet" because you don't have to run them at their limit for the same effect.

2) Airflow (m³/h): better to match than to maximize

An activated carbon filter needs contact time in the carbon bed. If too much air passes through too quickly, the risk of odor breakthrough increases. Always plan with a reserve – and it's better to regulate the system down than to run it at full throttle constantly.

3) Filter or complete set?

  • Filter only:perfect if you already have a suitable fan or want to specifically upgrade.
  • Filter set:useful if you want a coordinated bundle (filter + fan + connection).

Quiet & effective: 4 practical setup tips

  • Plan for reserve:A slightly stronger system that is regulated down is usually significantly quieter.
  • Smooth ducting:short paths, few kinks, suitable connectors – this reduces resistance.
  • Keep pre-filter clean:Dust collects first in the fleece – regular changing helps extend its lifespan.
  • Monitor humidity:Very high rH can impair filter performance – keep the climate stable.

When should an activated carbon filter be replaced?

If the odor binding noticeably diminishes or you notice "breakthrough" despite a clean setup, the filter is usually saturated. How long this takes depends heavily on air volume, humidity, and pre-filter maintenance.

FAQ: Activated Carbon Filter (ACF)

What does "ACF" mean?

ACF is the common abbreviation for activated carbon filter or odor filter in the exhaust system.

Why does odor sometimes come through despite an ACF?

Typical causes: too high airflow, too much resistance (long/kinked hoses), saturated filter, or highly fluctuating climate.

How do I extend the lifespan?

Keep the pre-filter fleece clean, don't run it constantly at its limit, keep humidity stable, and install the system tightly.

Complete your system: Exhaust Fans· Ducting· Connectors· Circulation Fans· Climate Control