Bathroom Vent Fan Light

Most bathrooms, especially those with no windows, a bathroom fan light or vent. There are many different types of bathroom vent fans available: simple exhaust fans, and more elaborate models with built in heaters, lights, and timers.

Some models are designed to be mounted on the ceiling, while others are mounted to the walls.  Here's an informative video showing some detail overview of different available types of bathroom exhaust fans:

Improper venting of the exhaust fan can cause moisture problems which resulting from  condensation forming within the vent. This condensation can drip or run back down the duct to leaking around the fan and create stains and problems in the ceiling or wall. The goal is to remove moisture from the house; so it should be vented to the outdoors - either through the roof, soffit or wall.

Moisture is a huge problem in the bathroom. Peeling paint, warped doors and mold are all caused by the collected damage done by water vapor that remains in the room after the bath or shower. An exhaust fan greatly reduces many problems caused by excess moisture.  There is even a high end Nutone bathroom vent fan that has a moisture sensor and it will turn itself on or off automatically as needed to protect your house from moisture.

Some bathroom fans are designed to be installed in the wall instead of the ceiling. These fans are mounted on exterior walls and are ducted directly outside. This installation usually includes a hood with gravity-hinged damper and is installed against the home's exterior siding immediately behind the fan. This hood assembly is similar to that used for venting clothes dryers. 

How to install your exhaust fan will differ by model.  Be sure to read the installation instructions included by fan manufacturers with the bathroom fan light or bathroom vent fan you buy. Many industry innovations are designed and manufactured for easy installation, trouble-free operation and extended life.