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What does ACH stand for?

ACH stands for Air Changes per Hour (ventilation)

This definition appears very frequently and is found in the following Acronym Finder categories:

  • Science, medicine, engineering, etc.

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Other Resources:
We have 138 other meanings of ACH in our Acronym Attic

Samples in periodicals archive:

36 HEPA fan filter units were designed to be housed within this large frame to produce 97 air changes per hour at air speeds of 0.
Active ceiling enclosures are AC-power ready and include a 9-CFM fan with transformer capable of providing more than 100 air changes per hour.
a leading proponent of the system, calls CADR "the single most important piece of information needed to make a head-to-head comparison of an air cleaner's performance [because] CADR gauges the real-world performance of an air purifier," not filter effectiveness or air changes per hour.