How Do I Measure My Air Filter?
At Air Filters Delivered, a common question we hear is "How do I know what size air filter I need?" Often the nominal size is printed on the side of the filter, but when it's not, you'll need to know how to measure an air filter. Watch the video below for step-by-step instructions to find the actual dimensions and get the nominal size for your system. Keep in mind that some HVAC systems require more than one air filter, so make sure you have the right measurements for all of them.
When you need to replace your filter, these simple steps will help you measure the right dimensions. Remember, regular maintenance of your home’s cooling and heating system is essential to ensure it operates efficiently. Proper maintenance will keep good air quality in your home, increase the life span of your system, and consume less energy lowering your bills.
Your filters should be changed every 30 to 90 days depending on the type and efficiency of your filter. However, according to Energy Star, filters should be changed every month during peak summer and winter months when your HVAC system is operating at its highest capacity.
Mold Spores
For safety, turn off your HVAC unit before attempting to change the filter. If you can't figure out how to turn off the unit, turn off the breaker. Most air filters are located to the right or bottom of the unit and should can be easily pulled out of the slot. Although not common, some filters are found in air vents instead. If that is the case, you might need to contact a professional for assistance.
Follow these 3 easy steps to measure your AC filter size:
Step 1 - Measuring Length and Width (L x W). (If your filter is not a square, the smallest measurement goes first).
Step 2 - Measure the thickness (Depth) of your filter from front to back.\
Step 3 - Put Your measurements together (L x W x D).
It’s as simple as that! You are now ready to buy the right filter for your AC or furnace.
Most Common Air Conditioner Filter Sizes
Most common air conditioner filter sizes below.
1 inch: 16x25x1, 20x20x1, 20x25x1, 16x20x1, 14x18x1,14x20x1, 14x24x1, 14x25x1, 14x30x1, 18x20x1, 20x30x1, 24x24x1, 12x24x1, 14x14x1, 16x24x1, 20x24x1, 12x12x1, 12x20x1, 16x30x1, 18x18x1, 24x30x1, 10x30x1, 12x30x1, 16x16x1, 18x24x1, 18x30x1, 20x22x1, 25x25x1, 15x20x1, 20x23x1
2 inch: 20x20x2, 20x25x2, 16x25x2
3 inch: 16x25x3
4 inch: 20x25x4, 16x25x4, 20x20x4, 16x20x4
5 inch: 20x25x5, 16x25x5
6 inch: 20x25x6