When it comes to air filters, there are a few key differences between 14x30x1 and 20x20x1 models. The nominal size is the dimensions that are normally used to label the filter, and these measurements are rounded up from the actual size. A 20 x 20 x 1 air filter actually measures 19-¾ x 19-¾ x ¾ x ¾, while a 14x30x1 filter is larger and has a higher MERV rating. This means it will capture more airborne particles like dust mites, pollen, pet dander, mold spores, and other allergens.
The cost of 14x30x1 filters is typically higher than 20x20x1 filters due to their larger size and higher MERV rating. However, if you're looking for maximum efficiency in your home or office space, then investing in a 14x30x1 filter may be worth it in terms of improved indoor air quality. When choosing between a 14x30x1 and 20x20x1 air filter, it's important to measure your existing filter before purchasing a new one so that you get one that fits properly. Some manufacturers may round up their measurements for nominal sizes; for example, a 20x25x5-inch whole-house filter may actually measure 19 3/4 x 24 3/4 x 4 3/4 inches.
By understanding these differences between 14x30x1 and 20x20x1 air filters, you can make an informed decision about which type of filter will best suit your needs.
