ÖNORM EN ISO 20789

This document specifies requirements for so-called “cold bubble-through” or “cold pass-over” humidifying equipment, hereafter referred to as a passive humidifier. Figure 1 and Figure 2 illustrate these passive humidifiers. This document is also applicable to those accessories intended by their manufacturer to be connected to a passive humidifier. A passive humidifier integrated into another medical device is subject to the requirements of the standard of the other medical device. This document does not specify the requirements for active heated humidifiers, heated breathing tubes, or active heat and moisture exchangers (HMEs), the requirements for which are given in ISO 80601-2-74. This document is not applicable to a passive HME, which returns a portion of the expired moisture and heat of the patient to the respiratory tract during inspiration without adding heat or moisture, the requirements for which are given in ISO 9360-1 and ISO 9360-2. This document is not applicable to nebulizers used for the delivery of liquids to patients, the requirements for which are given in ISO 27427. This document is not applicable to equipment commonly referred to as “room humidifiers” or humidifiers used in heating, ventilation and air conditioning systems, or humidifiers incorporated into infant incubators. An asterisk (*) as the first character of a title or at the beginning of a paragraph or table title indicates that there is guidance or rationale related to that item in Annex A. This document has been prepared to support the essential principles of safety and performance of a passive humidifier and related accessories as medical devices in accordance with ISO 16142-1:2016. Annex D maps the clauses and subclauses of this document with the essential principles of ISO 16142-1:2016.