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2. Air-mixing plenum - Wikipedia

   en.wikipedia.org/wiki/Air-mixing_plenum

   The mixing plenum normally combines two air streams, and includes for three sets of dampers: one for the fresh air, one for the exhaust air, and a mixing damper between the two air streams. [2] The mix of fresh air and recirculated air can thus be adjusted to suit the needs of the building's occupants. Most systems will use motorized dampers to ...

3. Damper (flow) - Wikipedia

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

   Damper (flow) Opposed blade dampers in a mixing duct. A damper is a valve or plate that stops or regulates the flow of air inside a duct, chimney, VAV box, air handler, or other air-handling equipment. A damper may be used to cut off central air conditioning (heating or cooling) to an unused room, or to regulate it for room-by-room temperature ...

4. Heating, ventilation, and air conditioning - Wikipedia

   en.wikipedia.org/wiki/Heating,_ventilation,_and...

   The percentage of return air made up of fresh air can usually be manipulated by adjusting the opening of this vent. Typical fresh air intake is about 10% of the total supply air. [citation needed] Air conditioning and refrigeration are provided through the removal of heat. Heat can be removed through radiation, convection, or conduction.

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   This hairstylist-approved dryer is on sale for just $27 during Walmart's big sale — it's 'better than a Dyson' ... Alrocket HEPA Air Purifier. $40 $70. Save $30. ... When will Home Depot start ...

6. Home Depot's Fourth of July patio furniture sale rocks - AOL

   www.aol.com/lifestyle/home-depot-presidents-day...

   Well, then, it's perfect timing — Home Depot has dropped a sweet sale on all things patio so you can make every backyard bash absolute perfection. That means up to a whopping 60% off on items ...

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8. Fire damper - Wikipedia

   en.wikipedia.org/wiki/Fire_damper

   Fire damper. Interior of German mechanical fire damper inside of a galvanised steel duct. Fire dampers (or fire shutters) are passive fire protection products used in heating, ventilation, and air conditioning (HVAC) ducts to prevent and isolate the spread of fire inside the ductwork through fire-resistance rated walls and floors. [1]

9. Duct (flow) - Wikipedia

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

   Ducts for air pollution control in a 17000 standard cubic feet per minute regenerative thermal oxidizer (RTO). A round galvanized steel duct connecting to a typical diffuser Fire-resistance rated mechanical shaft with HVAC sheet metal ducting and copper piping, as well as "HOW" (Head-Of-Wall) joint between top of concrete block wall and underside of concrete slab, firestopped with ceramic ...