The answer to 'air duct vs' is that air ducts and air vents serve different purposes in a home's HVAC system. Air ducts are the enclosed passages that distribute heated or cooled air throughout the home, while air vents are the openings where the air enters a room. Air ducts are an essential part of the HVAC system, responsible for delivering conditioned air, while air vents are the visible access points that allow the air to circulate.
The main differences between air ducts and air vents are their function, location, and maintenance requirements. Air ducts are typically hidden within walls or ceilings and require professional cleaning to remove dust, debris, and other contaminants that can accumulate over time. Air vents, on the other hand, are easily accessible and can be cleaned by the homeowner using a vacuum or damp cloth.