How does an AHU process return air from indoor spaces?

Points on how AHU process return air from indoor spaces:

• An Air Handling Unit or AHU collects return air from occupied spaces and prepares it for reuse or exhaust.
• The return air passes through mixing chambers and filtration sections where contaminants are removed.
• This air-handling process maintains balanced indoor air quality while improving system energy efficiency.

Also check it out related article on AHU to learn more about it.