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A Complete Guide to Aircon Filter Replacement

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Proper air conditioning system maintenance is essential to ensure optimal performance and indoor air quality. One of the most critical tasks is air filter replacement. Understanding when and how to replace the air filter and the benefits of doing so can save you from higher utility bills and ensure a healthy living environment.


Why Changing of Air Filter Matters

Air filters play a crucial role in your HVAC system by removing contaminants such as dust, pet dander, and airborne particles from the air. A dirty or clogged air filter can restrict airflow.  A clogged air filter makes it harder for the system to circulate clean air, which can also affect your indoor air quality and the health of your household.


Filter Types for Your Air Conditioner

If you have to replace a used filter, here are some of the types of filters you may consider: 

HEPA Filters 

These air conditioner filters are ideal for households needing to remove contaminants such as allergens and airborne particles. These filters are known for their high efficiency in trapping small particles, making them a popular choice for those with allergies or asthma.

Disposable Air Filters

Disposable filters are a convenient option for homeowners looking for easy maintenance. These filters are typically made of paper or fiberglass and are designed to be changed every 30 to 90 days. 

Reusable Filters

A reusable air filter offers an eco-friendly alternative, as it can be cleaned and reused multiple times. While they require more maintenance, reusable filters can be more cost-effective in the long run. Regular cleaning is essential to ensure they perform efficiently.


How to Replace Air Filters

Changing air filters is a straightforward process. First, locate the air handler or furnace where the filter is usually placed. Double-check the air supply arrows on the old filter to ensure proper airflow when you install the replacement filter.

Remove the dirty air filter and install the new or cleaned filter, making sure it’s properly seated. Note that you may need to clean the surrounding area if there’s excess debris. If you have pets, you may want to replace filters more frequently, as pet dander can quickly clog them.

How Often Should AC Filters Be Replaced?

AC filters should typically be replaced every 30 to 90 days, depending on usage and the environment. Homes with pets or high levels of dirt may require more frequent changes. Checking your filter monthly and changing it when dirty can ensure proper air supply and flow and prevent unnecessary strain on your HVAC system.

How Often Should Aircon Filters Be Cleaned?

If your system uses reusable filters, cleaning them every 30 days is advisable. A clean filter not only ensures efficiency but also improves air quality. Simply remove the filter, vacuum off dirt and debris, and rinse it with water if applicable. Make sure it’s completely dry before reinstalling it to avoid mold growth.

When replacing your filter, locate the vent or blower area where the filter is typically housed. Determine the filter’s exact location by referencing your owner’s manual. After ensuring the system is off for safety, carefully pull out the old filter and proceed with its removal. Make sure to check the cover of the filter compartment and clean around it to avoid dust buildup that could interfere with your system’s performance. If your unit is installed along a wall, consider any surrounding components during the process.


Tips for Prolonging HVAC System With Air Conditioner Filter Maintenance

Proper heating and vent maintenance is critical for longevity in air conditioners. Here are some tips to help you with your air conditioner, vent, and heating system:

Install Replacement Filters Regularly to Ensure Optimal Air Flow

Changing air filters on a consistent basis is crucial to maintaining your HVAC system’s functionality. A clogged or dirty filter can cause air restriction, forcing the system to work harder than necessary. By regularly installing new or cleaned filters, you can experience better airflow, which in turn helps the system run efficiently.

Check the Air Flow Arrows to Make Sure the AC Filter Is Installed Correctly

When installing a new filter, always check the airflow arrows printed on the side of the filter. These arrows indicate the direction in which the air should flow through the filter. Installing the filter incorrectly can lead to reduced airflow and strain on HVAC systems, compromising their performance.

Vacuum Debris Around the Air Handler and Furnace to Avoid Clogging the System

Dust and debris can accumulate around the air handler or furnace, leading to clogs that reduce system efficiency. Make it a point to vacuum the area around the air handler or furnace when replacing your air filter. This will help prevent debris from being sucked into the system and ensure that your air conditioning system continues to function at its best.

Refer to Your Owner’s Manual for Air Filter Replacement Guidance

Every HVAC system is different, and following the manufacturer’s recommendations for filter changes is essential. Your owner’s manual will specify your unit’s correct filter size, type, and replacement frequency, ensuring that you use the appropriate filter to maintain air quality. You should also do so when you need to purchase replacement filters. 


Common Mistakes to Avoid During Air Conditioner Filter Replacement

One of the most common mistakes is installing the filter in the wrong direction. The airflow arrows on the filter indicate in which direction the air should flow through the filter.

Another mistake is waiting too long to replace, which can cause air restriction and result in inefficiency or system failure. Also, never neglect the surrounding area—removing dust can make a big difference in the longevity of your system.


Ensuring Air Supply for a Healthy Environment

Aircon Filter Replacement

Regular changes to an air filter can prevent airflow restriction and keep your AC unit functioning effectively. Proper air filter maintenance improves indoor air quality and ensures your system operates efficiently for heating and cooling needs. Whether you have a central air system or a standalone air conditioner unit, it’s essential to regularly check and follow the manufacturer’s guidelines for filter changes to keep your system running smoothly.


FAQs

How do I know if my AC filter needs replacing?

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JP Reyes

JP has been in the aircon industry for almost as long as he has been alive. As a child JP would help his tatay fix aircon units at their junk shop in Cavite. After graduating UP in the early 2000's, JP then started his own Aircon servicing business and within 5 years had 10 shops in 8 different cities. Fast forward to today and JP brings all his experience and expertise online to give readers trustworthy advice and reviews about Air-conditioning buying, servicing, cleaning and repair in the Philippines.

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