Choosing the right size air filter for your home can be a daunting task. But with a few simple steps, you can easily determine the size of your air filter and find the best replacement for your needs. The first step is to check the size of your existing air filter. Most air filters have their size printed on the side of the frame.
The length, width and depth of the filter are measured in inches. To find the size of pleated filters used in your home, you don't need to look any further than your existing filters. In the outer frame, you'll see at least one set of numbers. If you see two sets of numbers, the filter size needed to request replacements is the nominal size, not the actual size.
You can ignore the actual size printed on the filter for this task, since the nominal size is the set of numbers needed to order new filters. Most air filters are 1 inch thick, but some systems can accommodate filters 2 to 5 inches thick. In our tests, we found that the thicker the filter, the better it works and the longer the replacement intervals. This means it's better for you and your heating, ventilation and air conditioning (HVAC) system. Once you know what size filter you need, you can purchase it online, through your HVAC service company or in-store. Rensa Filtration is a family of air filtration companies that manufacture and market best-in-class solutions that keep people safe and industries thriving.
If your family has allergies or respiratory problems and needs a high MERV air filter, consider a whole-home air filtration solution that meets your energy and filter efficiency needs. When buying an air filter, it's important to note that the industry standard for air filtration is to make filters a little smaller than their slot or frame, so they can easily slide into place without bending or breaking. The size of your pleated air filter is always presented in a string of three numbers, where the first number represents the length, the second number represents the width and the last number represents the thickness. For more information on individual products that use filters, such as air purifiers, room air conditioners, and dehumidifiers, refer to their specific buying guides. Service Experts Heating & Air Conditioning can also help you crack the code for home air filters so you're comfortable with your purchase. If you live in an older home with a non-standard size air return frame, you can use a foam weatherstrip tape to slightly increase the dimensions of your preferred filter or order a custom-sized air filter.