A permit is required to do the following:Install or change any part of a heating or cooling system that must be vented into any kind of chimney, including unvented decorative appliances
Install a woodstove, fireplace insert, pellet stove, or related venting
Install, alter, or repair gas piping between the meter and an appliance (indoors or outdoors)
Install bath fans, dryer exhausts, kitchen range exhausts, and appliances that are required to be vented