Perimetric Suction - what is it?

(Faber Cylindra hood with perimetric suction)

Faber has an advanced technology available on several high end hoods called perimetric suction. Some people will look at the technology on the surface and call it a gimmick, but it is far from a marketing hook, that I can guarantee.



By taking a look (see left) at the under-side of the Glass and Stainless steel slide out hood Velvet, the perimetric suction panel is comprised of a SS ventilation panel with narrow slots in the center and more slots around the perimeter. As air is drawn into the hood, the air has to speed up to enter the narrow slots on the hood. Just like when the windows in your car are almost closed, you hear a "woosh" of air as the air is coming in at a high rate of speed.

Additionally, as air is being drawn at a high rate of speed, a low pressure zone is created under the hood which acts as additional capture area since the air moves slower in the low pressure zone until it gets caught up in the faster high pressure zone above. This all creates energy savings by better efficiency since the motor doesn't have to work as hard as normal hoods to capture the same amount of contaminants.



In normal hoods (see photo left), the highest level of suction is concentrated in the center of the hood below the motor and fan blades / impellers. With a perimetric hood (see the next diagram on the left, bottom) , the suction power is spread out to the whole bottom of the hood even to the edges of the hood. The advantage of this system is the front far left and right burners would normally have lost fumes,steam, odors that would go around the hood. But instead these fumes will be caught into the hood since the suction power is no longer concentrated just under the motor.



As you can see in the diagram below, the fumes coming from the front left burner are almost 100% captured by the hood. This wouldn't normally happen with a traditional hood since you are drawing the front left burner contaminants to the center of the hood.













Finally, all the perimetric hoods from Faber contain a sound dampening panel behind the stainless steel panel. This reduces the air noise levels by at 25%.

To summarize the advantages of perimetric suction:

1) Improve efficiency and save energy by getting higher suction levels with lower speeds
2) Expand the suction area to the perimeter of the hood
3) Reduce air noise by 25% with sound dampening material
4) Since the panel is made of attractive stainless steel, looks more upscale than grease filters alone. The grease filters are hidden behind the perimetric panel.

The following products use perimetric suction: Matrix, Orrizonte, Cylindra, Cylindra Isola, Velvet

For more information on the hoods with perimetric suction visit our website, faberonline.com.