Are you wondering what size air filter to buy for your home? It's important to get the right size air filter for your HVAC system to ensure it runs effectively. Here's how to determine the size of air filter you need. First, take a look at your existing air filter. Most filters have the sizes indicated on the printed side, including length, width and depth in inches.
They are usually displayed in that order. If you can't find the size on the filter, use a tape measure to measure the length, width and depth of the inside of the air filter vent. The most common air filter sizes are listed below, ordered by width x height x depth in inches:
- 10x20x1
- 12x24x1
- 14x20x1
- 14x25x1
- 16x20x1
- 16x25x1
- 20x20x1
- 20x25x1
- 24x24x1
- 24x30x1
- 25x25x2
- 30x30x2
- 36x36x2
Filtration Types and Ratings
Fibreglass, polyester, washable, pleated and electrostatic filters offer different air filtering capabilities. The industry standard is to use the minimum rated efficiency value (MERV) air filter rating system. The Home Depot uses the FPR (Filter Performance Rating) system which indicates what type of air contaminants are ideal for capturing each filter.The higher the FPR number, the more efficient the filter is at capturing particles.
Thicker Filters Last Longer
Thicker air filters also have a longer lifespan, as they have a larger surface area for trapping and removing contaminants from the air. In general, 1- and 2-inch air filters are installed in standard HVAC systems, while 3- to 6-inch filters are installed in larger HVAC systems. Even if you're trying to fit several air filters in a small space, stacking them on top of each other isn't recommended.Replacement Programs. Most air filters have a replacement program specified in the user manual or on the company's website. If your filter is too small, dirt particles, such as dust, mold and other contaminants in the air, could slip through the gaps. If you have to insert the air filter to install it, you should try a different brand of furnace filter or a custom-sized air filter with a slightly smaller actual size.
Conclusion. Choosing the right size of air filter for your HVAC system is essential because it allows your HVAC system to operate effectively. Look up your existing filter size or measure it yourself to make sure you get the right replacement. The Home Depot offers a full range of air filter accessories so you can keep your system running at peak performance.
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