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  2. 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.

  3. Heating, ventilation, and air conditioning - Wikipedia

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

    Codes such as the UMC and IMC do include much detail on installation requirements, however. Other useful reference materials include items from SMACNA, ACGIH, and technical trade journals. American design standards are legislated in the Uniform Mechanical Code or International Mechanical Code. In certain states, counties, or cities, either of ...

  4. Leominster, Massachusetts - Wikipedia

    en.wikipedia.org/wiki/Leominster,_Massachusetts

    Leominster (/ ˈ l ɛ m ə n s t ər / LEM-ən-stər) is a city in Worcester County, Massachusetts, United States.It is the second-largest city in Worcester County, with a population of 43,222 [3] at the 2023 census. [4]

  5. List of Veterans Affairs medical facilities - Wikipedia

    en.wikipedia.org/wiki/List_of_Veterans_Affairs...

    Veterans' health care in the United States is separated geographically into 19 regions (numbered 1, 2, 4–10, 12 and 15–23) [1] known as VISNs, or Veterans Integrated Service Networks, into systems within each network headed by medical centers, and hierarchically within each system by division level of care or type.

  6. Worcester, Massachusetts - Wikipedia

    en.wikipedia.org/wiki/Worcester,_Massachusetts

    Due to its location in Central Massachusetts, Worcester is known as the "Heart of the Commonwealth"; a heart is the official symbol of the city. However, the heart symbol may also have its provenance in lore that the Valentine's Day card, although not invented in the city, was first mass-produced and popularized by Worcester resident Esther ...

  7. Duct (flow) - Wikipedia

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

    The adhesive on so called duct tape dries and releases with time. A more common type of duct sealant is a water-based paste that is brushed or sometimes sprayed on the seams when the duct is built. Building codes and UL standards call for special fire-resistant tapes, often with foil backings and long lasting adhesives.

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