When it comes to purchasing an air filter, the most important thing to consider is the difference between the nominal size and the actual size. The nominal size is a round size that is often used to label the filter, while the actual size is the exact dimensions of the filter by length, width, and thickness. It's essential to confirm the actual size of the filter before buying, as not understanding these numbers can lead to purchasing a filter that doesn't fit your oven or air conditioning system. For instance, a size of 16x25x1 may appear on the filter label, but if you measure the filter you will see that the actual size is smaller than the nominal air filter size.
Forcing an incorrectly sized filter can cause it to bend, damage it, or reduce its ability to function properly. When you buy an air filter online, you should look for the actual size in the product vignette or in the product description. This size is usually on the filter just below the nominal size and is usually labeled as the actual size. Knowing this information will help you make sure you have the right size filter, especially if you're replacing it with a different brand. In conclusion, it's important to be aware of both nominal and actual sizes when buying an air filter. Knowing this information will help you make sure you have the right size filter for your oven or air conditioning system.
Not understanding these numbers can lead to buying a filter that doesn't fit your oven or air conditioning system.