Trying to construct a ducting system but want to attach one last vent? A register boot just might be the thing you need to finish the job. Register boots are designed for attaching vents to ducting and ventilation systems, so install one when you need to complete your ventilation system. Register boots come in straight or 90-degree constructions. Vent boot hangers and duct start/take-off collars are easy to mount and install as well, and readily available. While you’re at it, shop for duct hoses, air vent covers and floor registers.