The hvac in most pc’s is like a flexible dryer vent hose type. It’s pretty easy to detach/reattach from the under side of the dash, and usually long enough to drop to the floor. If you’re boots/socks get wet inside from sweat, rain, snow, or whatever weird stuff your doing while you’re all alone. Just detach the vent hose from the underside of the dash and stick it in your boot with the heat ripping. Boom!!! Boot Dryer. Also good if you get cold feet in the winter. Good way to warm the boots up.