air changes meaning in English

换气次数

A minimum of six air changes per hour is suggested
建议每小时最少换气6次。
A method of determining air change rates in detached dwellings
独立住宅空气交换率测定方法
With approval , airflow may set back to 6 air changes per hour when space is unoccupied
如经过同意，当实验室无人时，可以将换气量降为6次每小时。
Standard test method for determining air change in a single zone by means of a tracer gas dilution
用示踪气体稀释法测定单区内空气变化的标准测试方法
Thermal insulation in buildings - determination of air change in buildings - tracer gas dilution method
建筑物隔热.建筑物中换气率的测定.示踪气体稀释法

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