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2. Sound attenuator - Wikipedia

   en.wikipedia.org/wiki/Sound_attenuator

   An inner perforated layer of light gauge sheet metal (baffle) The baffle is then filled with sound-absorptive insulation In high velocity systems, or when there is a concern for particulate matter in the air stream, a bagged or mylar-faced insulation is used. Packless sound attenuators do not include sound-absorptive insulation.

3. Baffle (heat transfer) - Wikipedia

   en.wikipedia.org/wiki/Baffle_(heat_transfer)

   As mentioned, baffles deal with the concern of support and fluid direction in heat exchangers. In this way it is vital that they are spaced correctly at installation. The minimum baffle spacing is the greater of 50.8 mm or one fifth of the inner shell diameter. The maximum baffle spacing is dependent on material and size of tubes.

4. Heating, ventilation, and air conditioning - Wikipedia

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

   Warm air systems distribute the heated air through ductwork systems of supply and return air through metal or fiberglass ducts. Many systems use the same ducts to distribute air cooled by an evaporator coil for air conditioning. The air supply is normally filtered through air filters [dubious – discuss] to remove dust and pollen particles. [15]

5. Soffit - Wikipedia

   en.wikipedia.org/wiki/Soffit

   A soffit is an exterior architectural feature, generally the horizontal, aloft underside of the roof edge. Its archetypal form, sometimes incorporating or implying the projection of rafters or trusses over the exterior of supporting walls, is the underside of eaves (to connect a supporting wall to projecting edge(s) of the roof ).

6. Vitamin D not recommended for preventing fractures in older ...

   www.aol.com/vitamin-d-not-recommended-preventing...

   The U.S. Preventive Services Task Force released a draft recommendation advising against using vitamin D to prevent falls and fractures in people over 60. Pharmacist Katy Dubinsky weighs in.

7. With a playoff blowout of Oregon, Ohio State proves it's ...

   www.aol.com/sports/playoff-blowout-oregon-ohio...

   The other area where Ohio State appears to have improved since the Michigan game is figuring out creative ways to get its stable of playmakers more involved.