Registers are the vents that control air flow into a room from heating and cooling systems. … Registers can be used in walls and ceilings so cold air can fall into a room, and in floors so heated air can rise. If they become blocked, the air temperature in the room can be greatly affected.

What is the difference between a register and a vent?

An air register has the capability of adjusting the air flow by opening and closing a damper or flaps, usually found at the bottom of the air register. An air vent cover, simply covers the duct without the added feature of adjusting air flow.

Where are ceiling registers located?

Supply register vents should be in every room as well. Located on the outer walls, under windows, in the ceiling, or on the floor, placement depends on the heating or cooling system as well as the construction of the home. Supply vents help change the room temperature to your desired heat or cool setting.