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  2. 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 ...

  3. Process duct work - Wikipedia

    en.wikipedia.org/wiki/Process_Duct_Work

    Process duct work conveys large volumes of hot, dusty air from processing equipment to mills, baghouses to other process equipment. Process duct work may be round or rectangular. Although round duct work costs more to fabricate than rectangular duct work, it requires fewer stiffeners and is favored in many applications over rectangular ductwork.

  4. Turning vanes (HVAC) - Wikipedia

    en.wikipedia.org/wiki/Turning_vanes_(HVAC)

    Turning vanes inside of large ductwork Turning vane close-up HVAC turning vanes are sheet metal devices inside of mechanical ductwork used to smoothly direct air inside a duct where there is a change in direction, by reducing resistance and turbulence .

  5. How Often Should You Clean Your Air Ducts? Experts Explain - AOL

    www.aol.com/often-clean-air-ducts-experts...

    How much does duct cleaning cost? Air duct cleaning costs are determined by a variety of factors, including accessibility, vent locations, area of the home, and the size. The costs can range from ...

  6. Corsi–Rosenthal Box - Wikipedia

    en.wikipedia.org/wiki/Corsi–Rosenthal_Box

    The Corsi–Rosenthal Box design consists of four [1] or five HVAC filters of effectiveness MERV13 or higher, which form the side walls of a box. [2] [3] Four-filter design variants use 20-inch wide filters, secured with duct tape and a piece of cardboard forming the bottom of the box.

  7. Ductwork airtightness - Wikipedia

    en.wikipedia.org/wiki/Ductwork_airtightness

    The ductwork airtightness level is the airflow rate through ductwork leakages divided by the ductwork area. It is recommended to test at least 10% and 10 m 2 of the duct surface including all duct types and a variety of sizes and components. The ductwork surface area is estimated according to EN 14239. [11]

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