The fan units inside a Range Hood are commonly called “Blowers”. The Range Hood Blower is what will draw the air into your Range Hood. There are essentially two different categories of blowers; Local Blower or Remote blower.
A Local Blower is located directly inside your range hood. Hence the name “Local”. Local blowers can be very quiet, this will be determined by the CFM and Sone value of the blower on different settings. Local Blowers and fans come in many sizes from small 200 CFM units up to 2000 CFM units. Some manufacturers sell the range hood blower pre-installed and with others, you will have to purchase your Blower or fan separately and mount it yourself. For more information on CFM or Sones, please see our articles titled “Why is CFM important?” and “What are Sones?”.
Remote Range Hood Blower:
The “Remote Blower” gets it’s name because it is a self contained unit that is installed remotely from the Range Hood. Generally there are 2 types of Remote Blowers for the typical Residential Range Hood application. Inline Remote Blower and Rooftop or Wall Mounted Remote Blower. Where you put your blower is a personal preference. In some applications, individuals want it even quieter in their kitchen and choose to install the Blower unit remotely. Remote blowers can be installed either inline with your ductwork, on the rooftop, or an exterior wall. When installed as a remote blower, you are moving the Blower or Fan noise out of the kitchen. Remember that the air passing through the range hood also creates sound, think of driving with a window down, so it’s not possible to get rid of all the noise but Remote Blowers are a good way to eliminate most of the unwanted noise from your cooking ventilation requirements.
Inline Range Hood Blower
Inline blowers are installed ‘inline’ with your ducting, somewhere between the range hood and the roof, such as your attic or crawl space. The area needs to be easily accessible for installation and maintenance.
Rooftop Range Hood Blower
Rooftop or exterior wall blowers provide the ultimate in quiet, high performance kitchen ventilation. The blower and casing can be large so plan accordingly.
Depending on the blower and Range hood configuration, you may need to purchase a separate set of controls to control the blower.
Your Range Hood Blower choice will be determined by the power you need from your blower(CFM), the noise your blower creates (Sones), how frequently you cook and your style of cooking such as strong smelling foods or frying. Good luck and Happy Cooking!