Since air filters are most often sold by their nominal dimensions, it is essential to learn how to correctly measure the air filter. When purchasing, you should order the filter by its nominal size, rather than its actual size. Hello, my heating unit is FG7SA-045C-23A. Most air filters have their size printed on the side of the frame.
The length, width and depth of the filter are measured in inches. For example, it will say something like “16x25x1", where 16 is the length, 25 is the width, and 1 is the depth. In order for an air filter to fit into the provided slot, it must be slightly smaller than the size of the allocated space. This is where the real and the nominal come into play.
Manufacturers round up and down to provide consistency. The resulting nominal dimensions are all you'll need to start replacing an HVAC filter. 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. When you change oven filters, the first thing to do is to know what size oven filter you have. However, filter frames of incorrect size or installation can cause air leaks, which significantly decreases the effectiveness of the filter.
This is the easiest and most obvious way to find the size of your air conditioner filter, but not all filters have size measurements listed on them. The first (and easiest) way to find out the filter size of your oven is to check the size of your previous air filter. Timely replacement of your oven filter is much easier when you know what size air filter you need. When buying an air filter, it's important to keep in mind that the air filtration industry standard is to make the filters measure a little smaller than their slot or frame, so they can easily slide into place without bending or breaking.
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. Originally manufactured for NASA, Colorfil filters help remove chemicals and odors at a molecular level that normal air filters cannot achieve. The MERV rating of an air filter is a measure of how effective an air filter is at removing particulates from the air. For air filters, the length and width dimensions are interchangeable, although conventionally the largest of the measurements is the width and the shortest is the length.
With all the sizes of air filters available, it can be overwhelming to find the right one for your air conditioning unit. The easiest way to identify the size of the air conditioner filter is to remove the existing filter from its slot and examine the filter frame. HVAC service companies typically offer air filter replacement services in addition to system repair and unit installation services. Please note that most disposable air filters are trimmed (this is an industry standard) from ¼ to ½.
Most air conditioning and HVAC units use standard size filters, but some require the purchase and installation of a custom-sized air filter.
