• Excellent if you need to capture large particles like dust and lint
• Washable filters only need to be replaced every few years
• Excellent for furnaces since they protect the motor and trap larger particles
• The large surface area is designed to capture more particles
• The filters contain charged fibres that can capture both large and small particles
• A larger surface area makes it easier to capture a larger volume of contaminants
There is no one-size-fits-all when it comes to air and furnace filters. A nominal filter measurement shows the approximate size of the filter with measurements that are rounded up to the nearest inch. An "actual" filter measurement displays the filter's specific, exact size. All air filters will show the measurement based on width, height, and depth (or thickness). These sizes vary depending on the type of system you have. The most common sizes include 16 x 25 x 1, 20x 20 x 1, 20 x 25 x 1, 16 x 20 x 1, and 20 x 25 x 5. Make sure you find the exact fit for your system or else the filter won't work the way it should. Look at your current filter and use the measurements printed on the frame when you're ready to buy a replacement.