As an HVAC expert, I have seen firsthand the impact that a good air filter can have on the performance and longevity of a furnace. Many homeowners underestimate the importance of choosing the right air filter for their furnace, but it can make a significant difference in the quality of air in your home and the efficiency of your HVAC system. When it comes to selecting an air filter, there are a few key factors to consider. One option is to simply replace your existing filter, but you may also want to invest in a whole-house air purifier or UV light. While these options may require a larger upfront cost, they can greatly improve the air quality in your home by removing harmful particles and bacteria. If you do decide to stick with a traditional filter, it's important to choose one that is compatible with your system.
This means buying the same type and size of filter that you currently use. Keep in mind that filters often have both a nominal size, which is printed on the filter, and an actual size, which can be measured with a tape measure. It's important to know both sizes when purchasing a replacement filter. The frequency at which you should replace your filter depends on several factors, such as the number of pets in your home and the level of air pollution in your area. For example, if you have multiple furry pets or live in an area prone to forest fires, you may need to replace your filter more often. To determine when it's time to change your filter, check it once a month and clean or replace it every 90 days.
The general rule of thumb is to replace your filter every three to 12 months, depending on its size. However, this can vary based on individual circumstances. The Minimum Efficiency Reporting Value (MERV) is a rating that measures the effectiveness of an air filter in capturing particles. The higher the MERV rating, the more efficient the filter is at removing pollutants from the air. It's important to choose a filter with a high enough MERV rating to effectively clean the air in your home. If you've neglected to change your filter for an extended period of time, you may notice a buildup of hair and dust around the filter opening.
In this case, it's recommended to vacuum both the outside of the furnace and the filter opening before replacing the filter. In this article, I will guide you through the process of selecting the best air filter for your furnace, explain how to properly change it, and discuss how air filters work. By regularly replacing your air filter, you can ensure that your HVAC system is running at its full capacity and providing clean, healthy air for you and your family. The frequency at which you should replace your filter also depends on whether you are using your furnace or air conditioning. In general, fan motors run faster in air conditioning mode, which means that filters should be changed more frequently during the summer months.