Finding the right size filter for your home can be a daunting task. With so many sizes of air filters available, it can be overwhelming to find the one that fits your air conditioning unit. Fortunately, there are a few simple steps you can take to make sure you get the right size filter for your home.Usually, the filter size is printed along the edge of the filter frame. Note that the size shown in bold type on the filter frame is the nominal size of the filter, which is likely to differ from its actual size.
To find the size of the pleated filters used in your home, you don't need to look any further than existing filters. On the outer frame, you will see at least one numbers game. If you see two sets of numbers, the filter size needed to order replacements is the nominal size, not the actual size. You can ignore the actual size printed on the filter for this task, since the nominal size is the number needed to order new filters. The easiest way to find out what filter size you should get for your oven is to simply remove the current filter and look at its dimensions. They are usually printed along one side of the filter.
Round up to the nearest inch to create the nominal filter size, which is the measurement you will use when purchasing a filter. If you don't have an existing air filter in your oven, or if the existing filter doesn't fit properly, you'll need to measure the duct opening. To do this, you will need a flashlight and a rigid measuring tape. Look inside the section of the oven where the air filter should go, there should be a 1″ filter track or opening where the air filter slides through. You want the air filter to cover the opening of the duct.
Measure the height and width of the duct opening and allow it to overlap a little if you have room. This will be the exact size you need to order for your new air filter. If you end up with a measurement for a size that you can't find a filter for, the measurement is most likely a different touch. If the filter fits perfectly, use the numbers on the side to choose a replacement every 60 days, or as recommended by the manufacturer. Getting stuck in a large filter where it doesn't belong can damage the HVAC system and not clean the air properly. Most air filters are located on the right or bottom of the unit and should be easily removed from the slot.
When you buy air filters, you will see the words “nominal size” and “actual size” together. There are also lenses that do not have filter threads and do not fit common diameter sizes. To convert actual to nominal size, measure the filter and round each dimension to the nearest inch. In some cases, they will take filters on the other end of the lens at the mounting point with what is known as a rear-mounted filter. If your lens doesn't have that option and you still want to use filters, it's worth considering a filter holder system like the Cokin filter system. By following these simple steps, you can make sure that you get exactly what you need when it comes time to replace your air filters. Knowing what size air filters you need will help ensure that your HVAC system runs efficiently and effectively.
