Features of the design of ventilation and air conditioning in the buildings of medical institutions (HCI)

Abstract

Class H filters (HEPA type-High Efficiency Paticle Air) with an efficiency of removing microorganisms and inert aerosol particles of 0.3 microns in size of 99.97% or more are used in “clean” rooms of cleanliness classes (ISO 5-ISO 7). Class U ultra-high purification filters (ULPA type-Ultra Low Penetration Air) with an efficiency of removing particles with a diameter of 0.1-0.2 microns of about 99.999%-in “clean” rooms of ISO 1-SO 4 classes. In rooms of ISO 8 class (class 100 000) the use of absolute filters is not practical. It is recommended to use pocket filters with a 0.5 µm particle removal efficiency of about 90%.

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