How to Clean Your Ducted Aircon Filter: A Comprehensive Guide

Sep 4, 2023

removing ducted aircon filter for cleaning

Why Cleaning Your Ducted Air Con Filter is Important

Cleaning your ducted air con filter is not just a matter of hygiene; it’s a necessity for maintaining air quality, energy efficiency, and the longevity of your ducted air conditioning system. This comprehensive guide will walk you through the why, what, and how of cleaning your ducted air con filter.

Why Clean Your Ducted Air Con Filter?

Increases Air Quality

A clean air filter is more effective at trapping dust, pollen, and other tiny particles. This ensures that the air circulating in your home is cleaner and healthier for you and your family. Poor air quality can lead to various health issues such as allergies, asthma, and other respiratory problems.

Reduces Power Consumption

A clogged filter makes your air conditioning unit work harder, consuming more electricity. Cleaning your filter can help you save on your power bills. The more efficient your system, the less you’ll spend on energy costs.

Extends the Longevity of Your Ducted Air Conditioning System

Regular cleaning prevents the build-up of dust and debris, which can otherwise lead to more serious issues requiring costly repairs. A well-maintained air conditioning system can last for many years, saving you money in the long run.

Tools You Will Need for a Filter Clean

Before you start, make sure you have the following tools:

  • Ladder
  • Screwdriver
  • Vacuum cleaner
  • Warm water
  • Mild detergent
  • Soft brush

Having the right tools at your disposal will make the cleaning process smoother and more efficient.

how to clean ducted aircon filter

Clean Your Ducted Air Con Filter in 7 Easy Steps

1. Accessing the Return Air Grille

Before you start, make sure to turn off the air conditioning unit. Use a ladder to reach the return air grille safely. Always take necessary safety precautions such as wearing gloves and a mask to avoid inhaling dust.

2. Opening the Return Air Filter Frame

Locate the screws or latches that hold the filter in place and carefully remove them. Keep these screws in a safe place as you’ll need them later to secure the filter back.

3. Removing the Air Filter

Slide out the air filter gently to avoid damaging it or releasing dust into the air. Inspect the filter for any visible damage or wear and tear.

4. Vacuuming the Air Filter

Use a vacuum cleaner to remove as much dust and debris as possible. This is a crucial step for maintaining airflow and energy efficiency. Make sure to vacuum both sides of the filter for thorough cleaning.

5. Washing the Air Filter

Soak the filter in warm water mixed with a mild detergent. Rinse it thoroughly to remove all the soap. This step is essential for removing any microscopic particles that the vacuum might have missed.

6. Drying the Filter

Place the filter in a sunny area and wait for it to dry completely. This is essential for preventing mould growth. Never reinstall a damp filter as it can lead to bacterial growth and bad odours.

7. Reinstalling the Filter

Slide the filter back into its frame and secure it with screws or latches. Turn on the air conditioning unit and check for any unusual sounds or reduced airflow.

Professional Cleaning and Maintenance

While DIY cleaning is effective, it’s also beneficial to have your aircon system professionally serviced. This ensures all internal components are in good condition.

How Often Should You Clean Your Air Filter?

For residential systems, cleaning every 2-3 months is recommended. However, this can vary depending on usage and the seasons. In commercial settings, monthly cleaning might be necessary due to higher usage rates.

FAQs: Your Questions About Ducted Air Conditioner Filters Answered

How often should I clean my ducted aircon filter?

  • Every 2-3 months for residential systems. For commercial systems, monthly cleaning is advised.

Can I use any detergent to clean the filter?

  • Use only mild detergents to avoid damaging the filter. Harsh chemicals can deteriorate the filter material.

What are the signs of a dirty aircon filter?

  • Reduced airflow, increased power consumption, and poor air quality are common signs.

Do dirty filters affect my electricity bill?

  • Yes, dirty filters make your system work harder, increasing your electricity bill.

Is it necessary to replace the aircon filter?

  • If the filter is damaged or too old, it’s better to replace it.

Can a dirty filter cause health issues?

  • Yes, a dirty filter can circulate pollutants like dust and pollen, leading to respiratory issues.

What if I can’t access the filter?

  • In such cases, professional help is advised.

Can I use a blower to clean the filter?

  • It’s not recommended as it can damage the filter.

What are the risks of not cleaning the filter?

  • Reduced air quality, increased power consumption, and potential damage to your aircon system.

Can I clean the filter with just water?

  • While water can remove some debris, a mild detergent is recommended for thorough cleaning.


Cleaning your ducted air conditioning filter is an essential practice for maintaining a healthy and efficient home. For more tips, check out this CHOICE Air Conditioner Cleaning Guide. If you enjoyed this, you might also like this detailed guide on how to clean your rangehood filter.

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