What is the common dimension for HVAC air filter sizes?

The choice of 16x20 inches as a common dimension for HVAC air filters is accurate because this size is widely manufactured and used in residential and light commercial HVAC systems. The size serves a variety of applications and fits numerous standard filter frames, making it convenient for both homeowners and building managers to replace filters due to its availability in many retail and supply stores.

While other sizes like 10x15 inches, 18x24 inches, and 22x30 inches may also be used, they are not as prevalent as the 16x20 size in the HVAC market. This commonality in size helps streamline maintenance processes and ensures that the filter replacement process is efficient and accessible for users.