How to Clean an HVAC Filter: A Step-by-Step Guide

How to Clean an HVAC Filter: A Step-by-Step Guide

How to Clean an HVAC Filter: A Step-by-Step Guide


An HVAC, or Heating, Ventilation and Air Conditioning system, is a crucial aspect of any household or commercial space. The air flowing through those ducts eventually gets into your lungs. Most of the HVAC units come with air filters that help in keeping your indoor air clean, free of any unwanted contaminants. But, with time and consistent use, the filters can accumulate dirt and debris, decreasing their efficiency, and ultimately leading to poor air quality. It is, therefore, essential to frequently clean your HVAC filters. In this blog, we’ll explain how to clean an HVAC filter in five easy steps.


Step 1: Turn off the HVAC system’s power supply

Before you begin with the cleaning process, ensure that the unit is completely turned off. Find the circuit breaker panel, locate the breaker controlling the HVAC system, and slide it to the ‘off’ position. This is an important safety measure to avoid any potential electric shocks.

Step 2: Locate the Air Filter

The next step is to locate the air filter of your HVAC system. You will find it near the air handler unit or near the return air duct and would look like a large rectangle-shaped panel. Remove the filter by sliding or pushing the panel.

Step 3: Clean the Air Filter

There are several methods to clean an air filter. The fastest and easiest method is to clean the filter with a vacuum. You can use a brush vacuum attachment or simply hold the filter up to the vacuum nozzle. Another option is to rinse the air filter with water. The only drawback with this method is that it can take longer for the filter to dry.

Step 4: Dry and Reinstall the Filter

After you have cleaned the air filter, let it dry in the sun or in a warm place before you reinstall it. Putting in a wet air filter will encourage mould growth. Clean any debris that may be near the air filter before reinstalling it firmly but gently in your HVAC unit.

Step 5: Turn on the Power

Once you have reinstalled your new or cleaned air filter, turn the power supply back on by switching it on at the circuit panel and then at the HVAC unit.



Cleaning your HVAC filter is a simple yet important process that will be beneficial for your indoor air quality and the efficiency of your HVAC system. It is recommended to clean your HVAC filter at least once a month, or more frequently if you have people with medical conditions or pets in your home. If you are unsure how to clean your HVAC filter or want to replace your HVAC filter, feel free to seek professional help. Contact Discount Air Supply for any of your HVAC supplies in Florida, and we’ll be happy to assist you with your HVAC needs.

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