The Floor Register tool is used to add air vents to the floor as part of your heating and cooling system. A floor register is the vent where warm or cool air enters a room. For example, you may see a small metal grille on the floor in a bedroom or living room—that is a floor register.

To add one, go to the HVAC tab in the main toolbar and select the Floor Register tool. Then click on the floor in the room where you want the vent to be placed. You can choose different register styles from the Properties panel either before or after placing it. Once the register is added, you can adjust its colors and materials in the 3D view to match your interior design.