What is the recommended face velocity for air leaving a supply register?

The recommended face velocity for air leaving a supply register is typically around 700 feet per minute. This velocity strikes a balance between comfort and efficiency. If the velocity is too low, it could lead to poor air distribution and inadequate cooling or heating. Conversely, if the face velocity is too high, it could create uncomfortable drafts and increase noise levels in the living space.

Maintaining a face velocity of 700 feet per minute ensures that the air is distributed evenly throughout the room while minimizing noise and enhancing occupant comfort. Thus, 700 feet per minute is considered ideal for most residential and commercial applications when designing and installing HVAC systems.