Natural ventilation


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Related to Natural ventilation: cross ventilation

natural ventilation

[′nach·rəl ‚vent·əl′ā·shən]
(mining engineering)
The weak and varying ventilation in a mine caused by the difference in air density between shafts.

Natural ventilation

1. A method for reducing energy use and cost and for providing acceptable indoor environmental quality rather than using mechanical ventilation. Natural ventilation systems rely on pressure differences to move fresh air through buildings. Openings between rooms such as transom windows, louvers, grills, or open plans are techniques to complete the airflow circuit through a building. Strategies include placement and operability of windows and doors, thermal chimneys, operable skylights, and exterior landscaped berms to direct airflow on a site.
2. A method that uses operable windows and direct outside air circulation, when the temperature, wind, precipitation, humidity, and pollution levels are acceptable. The amount of natural ventilation depends on the type, shape, placement, and size of the building and its openings. There are two primary natural ventilation methods: cross-ventilation and stack-ventilation. Cross-ventilation depends on wind-driven breezes, whereas stack-ventilation uses air density differences to create air movement across a building. See also: Ventilation systems

natural ventilation

Ventilation by air movement caused by natural forces, rather than by fans.
References in periodicals archive ?
Spaulding's environmental control system primarily relies on mechanical HVAC, with natural ventilation used as an ancillary mode.
This approach is what led the client to use natural ventilation as much as possible, even though Climate Zone 4A is a climate that is not thought of as typically suitable for this type of conditioning.
The current version of ANSI/ASHRAE/ASHE Standard 170 precludes natural ventilation in health care facilities.
Perhaps, there are possibilities to introduce such carving motifs to the contemporary architecture that has high concerns for natural ventilation.
A 2013 NREL study called Natural Ventilation in California Offices: Estimated Health Effects and Economic Consequences set out to determine if opening windows was an answer or a problem to poor IAQ.
According to the occupant's log, the occupants are not very active in utilizing the natural ventilation when the outside weather is comfortable.
A bigger length of the aerial part was observed in the bioreactor of temporary immersion (2,06cm), being followed by the treatments of natural ventilation (NVM) in liquid medium or increased of 5 or 6g [L.
To promote the use of natural ventilation in practice, building designers must have accurate and straightforward simulation tools available to ensure the acceptable thermal performance of their buildings.
His topics include physical processes in natural ventilation, steady and unsteady envelope flow models, contaminant transport and indoor air quality, computational fluid dynamics and its applications, full-scale measurements, and design procedures.
Residents of Italy used their knowledge of natural ventilation techniques to cool summer villas and palaces built between the 16th and 18th centuries.
The body, which champions the use of renewable energy, said: "The Stoke Park design represented a great natural approach to key health and well being issues such as natural ventilation and daylight.