Bathroom and Kitchen are particularly prone to moisture problems caused by high humidity.This feeds mold, mildew, and even structural rot. Kitchens need ventilation for expelling steam and cooking odors. And to expel humid air before it has a chance to condense, every bathroom needs ventilation.
Preparation
1. Determine CFM rating
The term "CFM" is an acronym that stands for "cubic feet per minute," a term used to describe a fan's efficiency in terms of airflow.
2. Determine sound rating
Sone: Measures of the sound the fan makes, typically from 0.5 (almost silent) to 4.0 (sounds like a normal television)
CFM and sound are related, because stronger fans -- with higher CFMs -- usually create more noise.
Installation:
| Wall / Window Mounted | |
| 1.Drill a hole in the wall or window as the same of duct. |  |
| 2.Loosen the panel screws and open it. |  |
| 3.Put the base into the mounting hole and make screw signs on the wall. |  |
| 4.Drill a hole at each mark place andput plastic rubber plug into the hole. |  |
| 5.Put the base into the hole and install the screws. |  |
| 6.Close the panel and connect the power. |  |
Ceiling Mounted
1. Make a wooden frame of above size.
2. Make a hole on the ceiling as the same size of fan duct.
3.Lock the fan into the wooden frame with matching screws and install the whole onto the ceiling keel.
4.Cover the frame and then fix it with matching screws; Connected with a flexible air duct & clamp.
Note: The real installation may vary with your home structures.