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2. Kitchen hood - Wikipedia

   en.wikipedia.org/wiki/Kitchen_hood

   A kitchen hood, exhaust hood, hood fan, extractor hood, or range hood is a device containing a mechanical fan that hangs above the stove or cooktop in the kitchen. It removes airborne grease, combustion products, fumes, smoke, heat, and steam from the air by evacuation of the air and filtration. [ 1 ]

3. Damper (flow) - Wikipedia

   en.wikipedia.org/wiki/Damper_(flow)

   This damper can switch the electrical power to control additional "slave" dampers, minimizing the electrical load on the damper's control circuitry and power transformer. A zone damper (also known as a Volume Control Damper or VCD) is a specific type of damper used to control the flow of air in an HVAC heating or cooling system. In order to ...

4. Blower door - Wikipedia

   en.wikipedia.org/wiki/Blower_door

   All interior doors are opened, and all exterior doors and windows are closed. HVAC balancing dampers and registers are not to be adjusted, and fireplaces and other operable dampers should be closed. All mechanical exhaust devices in the home, such as bathroom exhaust, kitchen range hood or dryer, should be turned off.

5. File:Back draft damper.svg - Wikipedia

   en.wikipedia.org/wiki/File:Back_draft_damper.svg

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6. Register (air and heating) - Wikipedia

   en.wikipedia.org/wiki/Register_(air_and_heating)

   A register's damper provides a critical function. Primarily, the damper allows the amount of hot or cool air entering a room to be controlled, providing for more accurate control over room temperature. [7] Dampers also allow air to be shut off in unused rooms, improving the efficiency of the HVAC system.

7. Gas spring - Wikipedia

   en.wikipedia.org/wiki/Gas_spring

   A gas spring consists of a sealed cylinder filled with a charge of high-pressure [5] gas, a piston rod attached to a piston with a sliding seal, and some oil. [1] The piston (or the cylinder wall) contains a number of channels that allow the gas to transfer between the lower chamber (between the piston and the closed end of the cylinder) and the upper chamber (between the piston and the head ...