When it comes to selecting an air filter for your HVAC system, there are a few key points to keep in mind. The best air filters have higher Minimum Efficiency Reporting Value (MERV) ratings, which indicate their effectiveness in trapping particulates. Air filters with higher MERV ratings not only capture more pollutants, but they also need to be changed less often, saving you time and money. Washable air filters are usually made of woven polypropylene and are electrostatically charged to capture more particles.
It is essential to get an exact fit for your filter; an incorrect size won't fit and will cause the filter to stop working properly. To effectively filter smaller particles, this type of medium usually has a dense network of small fibers with smaller openings through which air can pass. However, these filters may lose efficiency as the fibers become filled with dust. Advances in filter technology extend the surface of the medium, adding more surface area for air to come into contact as it passes through the filter.
Even if you clean a washable filter every month, it will eventually start to become clogged with debris. But these are usually only filters with a rating of at least MERV 11, the classification in which filters begin to trap most particles the size of common allergens. When HVAC filters become dirty and clogged with debris, air can't flow freely through the ducts, making your home less comfortable and eventually causing damage to HVAC equipment. If you have allergies, such as asthma, a HEPA or electrostatic filter may be ideal for you, as they are good at eliminating microscopic allergens.
If you currently have 1-inch filters, you might consider upgrading your system to include 4-inch filters. A filter with a very high MERV rating will be very dense, and a dense air filter means that your HVAC equipment will work harder to extract air through the filter. Most lower-efficiency filter media have relatively larger fibers and primarily filter large particles through deformation or impact. As the rating increases, filters can progressively capture smaller particles and tend to cost more.
Aftermarket filters, on the other hand, are manufactured by independent manufacturers for use with existing air systems. When choosing an air filter for your HVAC system, it is important to consider all of these factors in order to make an informed decision. A higher MERV rating will ensure that your air is filtered more effectively and that you don't have to change your filter as often. Additionally, getting an exact fit is crucial for having an effective air filter; an incorrect size won't fit and will cause the filter to stop working properly. To make sure you get the best air filter for your HVAC system, it's important to understand all of these factors and how they affect your home's air quality.
Consider all of these points when selecting an air filter for your HVAC system so that you can make an informed decision that will keep your home comfortable and healthy.
