Typically, 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. Step 1: Measure the length and width (L x W). If the filter is not square, the smallest measurement goes first).
Hello, my heating unit is FG7SA-045C-23A. To find the size of pleated filters used in your home, you don't need to look any further than your existing filters. In the outer frame, you'll see at least one set of numbers. If you see two sets of numbers, the filter size needed to request 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 set of numbers needed to order new filters. The easiest way to know what size filter to buy 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. For air filters, the dimensions of length and width are interchangeable, although conventionally the largest of the measurements is the width and the shortest is the length.
Air filter sizes can seem a little intimidating, especially when a large number of homes have several filters of different sizes. In fact, if you have to force an air filter in or out, it's the wrong size, so standard sizes are usually half an inch smaller than advertised. When buying air filters, you will see the words “nominal size” and “actual size” together. The first (and easiest) way to determine the size of your oven filter is to check the size of the old air filter.
Keep in mind that some HVAC systems require more than one air filter, so make sure you have the correct measurements for all of them. If your old air filter doesn't have the measurements printed on the side, you can measure the filter. As for depth measurement, standard air filter sizes are nominally 1 (0.75 real), 2 (1.75 real) and 4 (3.75 real) deep. Therefore, no matter what situation you are in, you will be able to calculate the size of the filter you are going to place in your oven.
If your oven has an air filter in the return vent, changing the filter is easy, as it can be done from inside your home. 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. Of course, this sounds easy when you hear the term “standard air filter size”; you might think that if your air filter is standard, it will be easy to find it when you arrive at the store. We recommend that you start your search for the replacement air filter by reducing the depth of the air filter.
Once you know the size of the old air filter, you can easily buy a new filter with the same dimensions.
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