Definitions for "Air Changes per Hour"
Keywords:  hour, volume, ventilation, per, outdoor
Number of times per hour a volume of air, equivalent to the volume of space, enters that space.
Air Changes Per Hour. The number of times that air in a house is completely replaced with outdoor air in one hour.
An expression of ventilation rates - the number of times in an hour that a home's entire air volume is exchanged with outside air.