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2. Plenum space - Wikipedia

   en.wikipedia.org/wiki/Plenum_space

   Space between the structural ceiling and the dropped ceiling or under a raised floor is typically considered plenum; however, some drop-ceiling designs create a tight seal that does not allow for airflow and therefore may not be considered a plenum air-handling space. [1] [2]

3. Air changes per hour - Wikipedia

   en.wikipedia.org/wiki/Air_changes_per_hour

   The method is designed to more accurately understand the effects of air-flow patterns within a space, to identify or avoid such occurrences as short-circuiting airflow patterns, in which most of the supply air goes directly to the exhaust, and fails to mix with the air already present. [2] [1]

4. AOL Mail

   mail.aol.com

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

5. Infiltration (HVAC) - Wikipedia

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

   In cold climates, with a 15 MPH wind, residences often have air exchange rates of 1.0 to 1.5 ACHs, far in excess of the ventilation air needs and are thus called loose construction. It is very easy to reduce infiltration rates to less than 1.0 ACH. Smoke candles and blower-door tests can help identify less-than-obvious leaks.

6. Laminar flow - Wikipedia

   en.wikipedia.org/wiki/Laminar_flow

   Laminar airflow is used to separate volumes of air, or prevent airborne contaminants from entering an area. Laminar flow hoods are used to exclude contaminants from sensitive processes in science, electronics and medicine. Air curtains are frequently used in commercial settings to keep heated or refrigerated air from passing through doorways.

7. College Football Playoff bracket: 12 things to know about the ...

   www.aol.com/sports/college-football-playoff...

   In fact, seven of the 12 teams in the field rank in the top 20 nationally in athletic budgets: Ohio State (No. 1), Texas (2), Penn State (5), Tennessee (11), Georgia (13), Clemson (16) and Notre ...

8. Spacers and standoffs - Wikipedia

   en.wikipedia.org/wiki/Spacers_and_standoffs

   Spacers can vary in size from microns to centimeters. They can be made of metal, plastic, glass, and other materials. Shapes include flat sheet, cylindrical and spherical. Two sizes of metal standoffs and one plastic standoff. The background depicts a standoff in use, holding a circuit board above a metal case.

9. FCC chair proposes cybersecurity rules in response to China's ...

   www.aol.com/news/fcc-chair-proposes-cyber...

   WASHINGTON (Reuters) -U.S. Federal Communications Commission Chairwoman Jessica Rosenworcel is proposing that communications service providers be required to submit an annual certification ...