As an expert in the HVAC industry, I have been asked countless times: does it really matter which air filter you use? And my answer is always a resounding yes. The truth is, not all air filters are created equal. With a wide variety of options available, selecting the right one can have a significant impact on the longevity and efficiency of your HVAC system. If your air conditioning system is equipped with or can be upgraded to accommodate a thicker media filter, you have a plethora of filtration options at your disposal. A media filter boasts a much larger surface area than a standard one-inch filter, allowing for more air molecules to pass through it.
This means that you can opt for a MERV 11 filter, which is approximately eighty-five percent effective against mold spores and larger dust particles. Not only does this protect your equipment, but it also improves indoor air quality without compromising the performance and efficiency of your system. One of the main advantages of using a thicker air filter with larger folds is that they do not need to be replaced as frequently. For instance, a four- or five-inch thick filter media filter (with an accordion effect) covers twenty or more additional square feet of surface area than a one-inch thick filter made of the same material. This means that you will have to replace it less often, saving you time and money in the long run. About ten years ago, manufacturers began to increase the number of folds in air filters and expand their surface area.
This allows for more free space for air to pass through while still providing a thicker filter medium for better filtration. Different types of filters, such as fiberglass, polyester, washable, pleated, and electrostatic filters, offer varying levels of filtration capabilities. If you currently have one-inch filters, I highly recommend upgrading your system to fit four-inch filters. Not only will this improve the overall efficiency of your HVAC system, but it will also provide better filtration for your home. Just make sure to install the new filter facing the correct direction, as indicated by the arrows on the filter frame that show the direction of air flow. It is important to note that not all filters are suitable for all HVAC systems.
For example, HEPA filters have extremely tight filtration, which can restrict airflow and make them impractical for most residential forced air systems. This is why it is crucial to use only air filters with the MERV rating recommended by the manufacturer of your HVAC system. When it comes to replacing your air filter, it is essential to follow the recommended schedule. Flat filters should be replaced every three months, or monthly if you have allergies, pets, or someone in your household smokes. This ensures that your system is running efficiently and effectively, and that your indoor air quality is not compromised.
