Installing floor vents, whether metal or wood, starts with measuring the duct opening accurately. Common sizes like 4×10 or 6×12 are typical, but always double-check before purchasing. If the floor isn’t cut yet, use the register as a template to mark the opening. Mark straight lines with a pencil or chalk, using a carpenter’s square for accuracy. Cut the floor carefully with a jigsaw or suitable saw, then smooth the edges with sandpaper or a file for a snug fit. Test-fit the vent to ensure it sits level and flush. Metal registers may simply drop in or require screws depending on the manufacturer. Align the vent with the room’s airflow, clean the area, and maintain it regularly to prevent dust buildup.