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2. Drain-waste-vent system - Wikipedia

   en.wikipedia.org/wiki/Drain-waste-vent_system

   In-line vent for under-cabinet waste plumbing. In-line vent (also known as an island fixture vent, and, colloquially, a "Chicago Loop", "Boston loop" or "Bow Vent") is an alternate method permissible in some jurisdictions of venting the trap installed on an under counter island sink or other similar applications where a conventional vertical ...

3. Air handler - Wikipedia

   en.wikipedia.org/wiki/Air_handler

   Air handlers typically employ a large squirrel cage blower driven by an AC induction electric motor to move the air. The blower may operate at a single speed, offer a variety of set speeds, or be driven by a variable-frequency drive to allow a wide range of air flow rates. Flow rate may also be controlled by inlet vanes or outlet dampers on the ...

4. Central vacuum cleaner - Wikipedia

   en.wikipedia.org/wiki/Central_vacuum_cleaner

   The routing and design of the vacuum piping layout are very similar to drain-waste-vent (DWV) plumbing, with the exception that pipe pitch or gradient for drainage is not required. Vacuum system designs share with DWV designs a concern about eliminating internal roughness, ridges, burrs, sharp turns, pockets, or other obstructions to smooth ...

5. Dust collector - Wikipedia

   en.wikipedia.org/wiki/Dust_collector

   They are usually used for general ventilation or dilution ventilation and are good in developing up to 0.5 in. wg (124.4 Pa). Tube-axial fans - Tube-axial fans are similar to propeller fans except they are mounted in a tube or cylinder. Therefore, they are more efficient than propeller fans and can develop up to 3 to 4 in. wg (743.3 to 995 Pa).

6. Category:Ventilation fans - Wikipedia

   en.wikipedia.org/wiki/Category:Ventilation_fans

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7. Centrifugal fan - Wikipedia

   en.wikipedia.org/wiki/Centrifugal_fan

   A centrifugal fan is a mechanical device for moving air or other gases in a direction at an angle to the incoming fluid. Centrifugal fans often contain a ducted housing to direct outgoing air in a specific direction or across a heat sink; such a fan is also called a blower, blower fan, or squirrel-cage fan (because it looks like a hamster wheel).