Most people only think about cleaning air conditioner and ventilation filters in summer. Autumn is actually the better time for a deep clean. We spend far more time indoors during winter, and the air quality in our homes depends directly on how clean these systems are.
Why dirty filters are a real problem
Clogged filters reduce the efficiency of the unit and drive up energy consumption. More importantly, they become a reservoir for dust, allergens, mould spores and bacteria. Once the heating is running, those particles get pushed back into the air you breathe every day. That raises the risk of allergies, respiratory irritation and illness considerably.
How to do it properly
The process needs to be thorough: remove the filters, carefully vacuum off surface dust, wash them if the manufacturer allows it, then treat them with a dedicated sanitising product such as Wellkem WK Air San AC, which eliminates germs and unpleasant odours at the source.
What you gain from an autumn clean
Done now, this one task means healthier air for the whole winter. The unit runs without resistance, uses less energy and lasts longer. People with allergies or asthma tend to notice the improvement quickly.
Filter cleaning does not take long. The effect on your home comfort and energy costs is significant though, particularly in the months when you are inside most of the time.