Ventilation rate


Also found in: Dictionary, Thesaurus, Medical, Legal, Financial.

Ventilation rate

The rate at which indoor air enters and leaves a building. Expressed as the number of changes of outdoor air per unit of time: air changes per hour, or the rate at which a volume of outdoor air enters in cubic feet per minute.
References in periodicals archive ?
Association between substandard classroom ventilation rates and students' academic achievement.
It also shows that high temperature, high humidity, and ventilation rate are advantageous to enhance the diffusion ability of formaldehyde from wood composites, while the influence of the ventilation rate is relatively weak.
There, 2 ACH represents a fairly high ventilation rate of ~60 cfm/person (30 L/s-person).
The ventilation rate in the building was established, operating a variable number of fans for a certain time.
Before participants entered the chamber, the desired chamber temperature and ventilation rate were established at target values of 23[degrees]C (73[degrees]F) and 100 L/sec (210 f[t.
The three critical design criteria for a laboratory space are sometimes at odds with each other: The minimum ventilation rate may provide too much or too little cooling for a particular space as it will be used.
The time between the produced repeated coughs decreased with the increase of the background ventilation rate.
If the ventilation rate is reduced the amount introduced indoors is relatively small, leading to low concentrations especially if the pollutants are of high adsorption characteristics (Yanagisawa et al.
It continues: "A major concern for the toxicity of DCM is the especially susceptible populations", stressing that children are more vulnerable "due to a potential for higher exposure as they have a higher ventilation rate than adults and the concentration of DCM may be higher at floor level".
In 61% of the 30-second segments studied, the ventilation rate was more than 20 ventilations per minute.
In 61% of the 30-second segments, the ventilation rate was more than 20 ventilations per minute.