If bath fan ducting isnt properly insulated, the moist air from your house will condense inside the duct. The first step is to head to the attic. You may find that the insulation simply needs to be ...

uninsulated duct with much superior 4-in. insulated ductwork ... sones (which you can easily hear in the next room). Select the ventilation capacity of the fan that fits the size of your bathroom. To ...