Ventilation effectiveness

Ventilation effectiveness

The system’s ability to remove pollutants generated by internal sources in a space, zone, or building. In comparison, air change effectiveness describes the ability of an air distribution system to ventilate a space, zone, or building.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
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The term or metric that is most often used as an indicator of the internal ventilation effectiveness for laboratory design is the air change rate--or more specifically, the number of air changes per hour (ACH).
"We're providing for increased outside air because the ventilation effectiveness is higher, so we're able to provide 30 percent more outside air to keep our C[O.sub.2] levels down.
Ventilation arms (pictured) remove air contaminants while an enthalpy wheel provides exhaust air heat recovery, the latter of which has improved heating and ventilation effectiveness by roughly 70 percent.
Ventilation effectiveness as an indicator of occupant exposure to particles from indoor sources.
Increased ventilation rate does not always result in better ventilation effectiveness when using warm air heating.
W Assessing the ventilation effectiveness of naturally ventilated livestock buildings under wind dominant conditions using computational fluid dynamics.
Ventilation effectiveness is maximized, particularly for perimeter rooms in cooling-dominated climates, by Type A ceiling-mounted, horizontal-throw diffusers, with maximum throw reaching the far wall and with exhaust registers.
It was found that the use of a secondary PV system in conjunction with a primary air-conditioning system in a hot and humid climate can efficiently enhance thermal comfort and improve the ventilation effectiveness at the immediate breathing zone by up to 50% more than can be obtained with mixing ventilation (MV) alone (Sekhar et al.
Paragraph 0.26 states that Ventilation effectiveness is a measure of how well a ventilation system works in terms of delivering the supply air to the occupants of a building.
Ventilation efficiency is the term used to quantify ventilation effectiveness, being a measure of the ability of a ventilation system to exhaust the pollutants generated within a space.
Using displacement ventilation increases the ventilation effectiveness and, thus, improves the IAQ for a specific air change rate compared with mixing ventilation.