Do furnace filters have to be exact size?

The oven filters must be securely adjusted, but there is no need to force them into position. If the filter has to be forced into its slot, it is likely to be too large.

Do furnace filters have to be exact size?

The oven filters must be securely adjusted, but there is no need to force them into position. If the filter has to be forced into its slot, it is likely to be too large. If an incorrectly sized filter is inserted, it may bend, damage the filter, or reduce its ability to function properly. The filters are smaller than their slot for easy replacement.

Some HVAC units may need a filter with unique or rare dimensions. In these cases, it is necessary to order a customized filter. If the filter has no real dimensions on the outside of the filter, you can measure it to get the correct dimensions. The number is then usually rounded up and used to label air filter packs; this measurement is known as nominal size. But what does nominal size mean anyway? Learn the difference between the two dimensions and buy your air filter with confidence.

Round to the nearest inch to get the nominal size of the filter, which is the measurement you'll use when buying a filter. The nominal dimensions refer to the rounded number used on the packaging label of air filters and wood. However, you can choose not to use the factory-installed filter grids and ask an HVAC professional to install an external filter grid to obtain a filter thicker. The actual size is the exact size of your air filter and the actual dimensions when you measure length, width and depth (thickness).

When buying an air filter online, the most important thing to know is that air filters have two sizes that you need to understand: the nominal size (which is a round size often used to label the filter) and the actual size. I chose this company because of a very useful YouTube video that explains how to assemble the air filter I wanted to buy. For example, a number of 20 x 30 x 1 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 of 20 x 30 x 1.Since air filters are most often sold by their nominal dimensions, it's crucial to learn how to measure your air filter correctly. The gaps will allow dust, dirt, and germs to bypass the filter and possibly re-circulate to the air in your home.

If a large filter gets stuck where it doesn't fit, it can damage the heating, ventilation and air conditioning system and not clean the air properly. Even so, understanding the most common air filter size can be difficult if you're not sure what the numbers mean.