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  2. Duct leakage testing - Wikipedia

    en.wikipedia.org/wiki/Duct_leakage_testing

    A duct leakage tester is a diagnostic tool designed to measure the airtightness of forced air heating, ventilating and air-conditioning (HVAC) ductwork. A duct leakage tester consists of a calibrated fan for measuring an air flow rate and a pressure sensing device to measure the pressure created by the fan flow.

  3. File:Duct Blaster.jpg - Wikipedia

    en.wikipedia.org/wiki/File:Duct_Blaster.jpg

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  4. 9 Antique Items You Could Sell for Thousands of Dollars

    www.aol.com/9-antique-items-could-sell-190033573...

    Star Wars Kenner Vintage 1977 to 1985 Complete Lot of 102 Figures: Price on eBay is $38,500. Vintage 1985 Cabbage Patch Kids Doll In Original Box With Birth Certificate: The price on eBay is $5,000.

  5. Sound attenuator - Wikipedia

    en.wikipedia.org/wiki/Sound_attenuator

    A sound attenuator, or duct silencer, sound trap, or muffler, is a noise control acoustical treatment of Heating Ventilating and Air-Conditioning (HVAC) ductwork designed to reduce transmission of noise through the ductwork, either from equipment into occupied spaces in a building, or between occupied spaces.

  6. Turning vanes (HVAC) - Wikipedia

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

    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. See also

  7. Duct (flow) - Wikipedia

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

    Round duct is made using a continuous spiral forming machine which can make round duct in nearly any diameter when using the right forming die and to any length to suit, but the most common stock sizes range evenly from 4" to 24" (10-60 cm) with 6"-12" (15-30 cm) being most commonly used. Stock pipe is usually sold in 10' (300 cm) joints.

  8. Air sock - Wikipedia

    en.wikipedia.org/wiki/Air_sock

    Air sock in an indoor swimming pool. An air sock is a textile or fabric duct used for draught-free air distribution and delivery of conditioned air as an alternative to traditional spiral or rectangular steel ducts with grilles and diffusers.

  9. Soda blasting - Wikipedia

    en.wikipedia.org/wiki/Sodablasting

    A soda blaster is a self-contained system that includes a blast generator, high pressure compressed air, moisture decontamination system, blast hose, and a blast nozzle. The blasting material consists of formulated sodium bicarbonate (also known as baking soda).