An air cabin filter is an essential component in any vehicle’s heating and cooling system.
Also known as a pollen filter, an air cabin filter removes airborne contaminants including pollen, dust, bacteria and exhaust particles from the air entering the passenger compartment. In doing so, it helps protect the passengers from contaminants in the air they breathe meaning they won’t be exposed to chemicals or toxins.
If you are new to what cabin filters are and how they work, you’ll find a simple guide below brought to you by the Filter Services UK team.
What Is A Cabin Air Filter?
The cabin air filter in a vehicle helps remove harmful pollutants, including pollen and dust, from the air within a car, lorry or any other vehicle type. This filter is often found behind the glovebox and cleans the air as it moves through the vehicle’s HVAC system. These filters need replacing if there are any unpleasant odours or the airflow has decreased.
What Does A Cabin Air Filter Do?
Cabin filters perform three main functions:
1 – They block particulate matter such as pollen, dust, soot and road debris from entering the vehicle interior.
2 – In activated carbon variants, they absorb odours and harmful gases such as ozone and nitrogen dioxide.
3 – They protect the blower motor and evaporator from becoming clogged with debris over time, which can reduce the efficiency of the air conditioning system and lead to costly repairs if left unaddressed.
When Should You Replace A Cabin Air Filter?
As a general guide, cabin air filters should be replaced every 10,000 to 15,000 miles or at each preventative maintenance schedule, whichever comes sooner. In practice, vehicles used in urban environments, on dusty roads or during high-pollen seasons may need more frequent changes.
Signs that a replacement is overdue include reduced airflow from the vents, musty or unpleasant smells when the heating or air conditioning is running, and increased noise from the blower motor.
What Happens If You Don’t Change The Cabin Air Filter?
If you don’t change your cabin air filter, the filter media becomes progressively clogged with the particles it has been capturing including pollen, dust, soot and debris. Eventually, this will reduce its ability to function effectively. The consequences build gradually but can affect both the vehicle and its occupants.
The most immediate effect is reduced airflow through the ventilation system. A blocked filter restricts the volume of air the blower motor can push through, meaning the heating and air conditioning become less effective. In warmer months this can make the cabin uncomfortable; in winter it affects demisting performance, which has safety implications.
A clogged filter also becomes a source of unpleasant odours. Accumulated organic matter such as damp leaves, pollen and insects can begin to degrade inside the filter housing, and the smell is drawn into the cabin whenever the ventilation is running.
Over time, a severely blocked filter puts additional strain on the blower motor. The motor has to work harder to pull air through a restricted medium, which can shorten its lifespan and lead to an expensive repair that a routine filter change would have prevented.
For occupants with allergies, asthma or respiratory sensitivities, the air quality consequences are the most significant concern. A saturated filter loses its ability to trap new particles and may even begin to release previously captured contaminants back into the airstream, worsening in-cabin air quality rather than improving it.
Air Filters and Cabin Filters by Filter Services
Filter services supply a huge selection of both air filters and cabin filters for domestic and commercial use to customers across the UK.
Manufactured from a range of highly valued brands, our filters are of high quality and can fit and be replaced in no time, used for a number of different vehicle types and industries including construction, car filters, lorries, agriculture, tractors, energy, mining and more.
Buy automotive filters from Filter Services Today. We stock over 5000 parts and automotive consumables at any one time so we’ve probably got what you need. If not, we’ll order it for you. With next-day and even same-day delivery available, we’re here to help you.
Get in touch with the team and we’ll find the right solution in seconds.