Range Vent Hood Basics - How They Work

Components

Vent hoods are simply a fan and/or light housed in a metal and/or glass shroud.

Principle

The metal/glass shroud acts as a deterrent to the spread of a stovetop fire, and helps to collect cooking fumes. The fans come in two varieties, rotary or centrifugal and performs either of two actions:

  1. For an external/outside vented system, it draws fumes and odors up or down--depending on the style of vent hood--through a grease filter inside a duct system and out of the house.
  2. For systems without external/outside venting, fumes and odors are drawn over an activated-charcoal filter and re-circulates the air, back into the room.
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