Start by chopping absent the caulking round the vent on the siding using a utility knife, clear away any screws and unclamp the duct leading to the dryer. Slide the previous vent out on the wall, slip in the new one and reattach it into the duct. Caulk across the vent flange.A periscope-fashion dryer vent or recessed dryer vent box will lessen the