Measuring your air filter correctly is a straightforward process that ensures you purchase the right replacement size for your HVAC system. The key is to measure the physical dimensions of the filter itself.
Accurate Measurement Steps
To measure your air filter, you will need a standard tape measure. Follow these simple steps:
- Measure the Width: Place your tape measure across the shorter side of the filter's face. Note down this measurement.
- Measure the Length: Place your tape measure across the longer side of the filter's face. Note down this measurement.
- Measure the Depth (Thickness): Turn the filter on its side and measure the thickness from one face to the other. Note down this measurement.
According to guidance on measuring home air filters, you should perform these measurements yourself using a tape measure. Begin by measuring the width, followed by the length and depth, taking measurements accurately to an eighth of an inch. These dimensions will give you the actual size of your air filter.
Why Measure Accurately?
Using the correct filter size is crucial for your HVAC system's performance and lifespan. A filter that is too small will leave gaps, allowing unfiltered air and particles to enter the system and your home. A filter that is too large simply won't fit into the filter slot or return air vent, preventing proper installation and airflow. Measuring the actual size ensures you get a snug and effective fit.
