As a seasoned expert in the HVAC industry, I am often asked about the importance of air filters and how to choose the right one for a home. With a plethora of options available, it can be overwhelming to determine which air filter is the best fit for your specific needs. In this article, I will share my knowledge and experience to help you make an informed decision when purchasing an air filter for your home. First and foremost, it is crucial to know the size of the air filter that fits your air return. This information can usually be found on the side of your current air filter.
Keep in mind that this size is the nominal size, which means it is rounded off from its actual size. Air conditioning filters come in various sizes, so it is essential to know the correct size for your system. To ensure that you have the correct size, take out your current air filter and check the dimensions printed on the frame. It is also important to pay attention to the MERV (Minimum Efficiency Reporting Value) number of the filter. This number indicates how effective the filter is at capturing particles (measured in microns) from the air.
The lower the MERV number, the less effective the filter will be at filtering out contaminants. It is crucial to remember that the air filter is what separates you and your sensitive central forced air equipment from harmful particles in your home's air. For instance, I recently had a customer with a Trane Xb tue1c100a481ab system who was unsure about which size filter to use. After inspecting their system, I found that there was nothing inside it to hold a 20x24 filter in place. This is a perfect example of why knowing the correct filter size is crucial. If an air filter is too small, it can create air voids and allow contaminants to bypass the filter material.
On the other hand, if the filter is too big, it may not fit properly and leave gaps in the filter grille. To avoid these issues, always make sure to measure your current filter or consult the product manual for your air conditioning system. You can also contact the manufacturer directly with the model number of your system for assistance. When purchasing an air filter, you may come across terms like “nominal size” and “actual size”. The nominal size is the size mentioned on the packaging, while the actual size is the true size of the filter.
It is important to note that these two sizes may differ, so always measure your current filter to ensure you are getting the correct size. In addition to size and MERV rating, there are other factors to consider when choosing an air filter. One of these factors is FPR (Filter Performance Rating), which indicates what type of airborne contaminants a filter is best suited for. For example, a filter with a higher FPR may be more effective at capturing allergens and pollutants, making it a better choice for those with allergies or asthma. It is also important to consider the minimum protection requirement of your HVAC system when choosing an air filter. If you or a loved one has allergies or asthma, you may need a filter that exceeds this minimum requirement to provide better protection. In conclusion, choosing the right air filter for your home is crucial for maintaining good indoor air quality and protecting your HVAC system.
Remember to pay attention to the size, MERV rating, and FPR when making your decision. And if you are ever unsure about which filter to use, consult your product manual or contact the manufacturer for assistance. By following these tips, you can ensure that you are getting the best air filter for your specific needs and keeping your home's air clean and healthy.