What is the Difference Between a 14x18x1 Air Filter and Other Sizes?

Learn about nominal and actual sizes for air filters and how to identify them. Understand why regular replacement of air filters is important and how Filter King AC & oven filters can help.

What is the Difference Between a 14x18x1 Air Filter and Other Sizes?

The nominal size of an air filter is the dimension that is typically used to label it. This measurement is usually a rounded value of the actual filter size. To identify the size of an air conditioner filter, you must remove the existing filter from its slot and examine the filter frame. The size is usually printed along the edge of the filter frame.

Please note that the size shown in bold is the nominal size, which may differ from the actual size. If the actual dimensions do not appear on the filter frame, you should measure it and round to the nearest whole number to determine the nominal size. The actual size of the air filter should be 0.25 to 0.5 cm smaller than the slot or frame. When purchasing an air filter, it is important to understand both the nominal size (which is a rounded size often used to label the filter) and the actual size. If your filter does not have its actual dimensions printed on it, you can measure it to get the correct dimensions. Regularly replacing air filters in your home can help prevent costly repairs or system replacements in the future.

Most white pleated air filters are inherently similar at each efficiency level, and vary slightly from brand to brand. For common brands of air conditioning systems, such as Goodman, Lennox, Trane, Rheem York, Coleman and Carrier, most standard air filter sizes will work. Filter King AC & oven filters are not your typical fiberglass filters that need to be replaced every 30 days. If you have difficulty fitting an air filter into its slot, try a third-party oven filter or a custom-sized air filter with a slightly smaller actual size. Filter King brand filters provide necessary filtration for homes in a variety of environments, protecting you and your family against various types of airborne particles. If your filter isn't the right size, either too small or too large, air will flow around it instead of going through it and not all of the air will be filtered.

Forcing an incorrectly sized filter can cause it to warp, damage, or reduce its ability to function properly. Buy 2 or more 14x18x1 air conditioning filters or heaters today to get free shipping and a 5% discount on all future orders.

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