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Samples in periodicals archive:
The facility's dedicated air handler brings in 100-percent outside air with HEPA-in and HEPA-out filtering at the rate of 11,000-cubic-feet per minute and 25 air changes per hour.
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.
Complete air handling and air conditioning systems are also installed, with HEPA filters, maintaining over 100 air changes per hour.
CDC contagious disease guidelines state that room air filtration exceeding 12 air changes per hour can reduce the spread of contagious illnesses, including common colds or flu.
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.
The Queen had been absolutely right; the number of air changes per hour was totally inadequate, and straight away we took all sorts of steps to improve the conditions.
5 and 2 air changes per hour that correspond to 18 [ft.
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.