It is very important to correctly design the operating room and intensive care units described in DIN 1946/4 and other relevant standards and to choose the right filtration system. In addition to this, choosing the correct filters for air handling units for a hospital and having indoor air quality in hospitals is essential for the health of your patients, employees and visitors.
The design of the ventilation system in the hospital air-conditioning system is more complex and has more risk factor than the design of the comfort air-conditioning system. While two parameters such as temperature and humidity control are important in comfort air conditioning on the other side parameters such as pollutants, fresh air, exhaust air, air flow directions and air pressure must be taken into consideration in the case of hospital air-conditioning. The first idea of the hospital air conditioning systems, to send the clean air into the room without the particles, according to the desired Clean Room Classifications. In the offices and waiting rooms a normal air quality is sufficient, however in the largest part of the hospital a much higher air quality is desired. For example; areas such as operating rooms and the intensive care unit have the highest air quality demands. This can be achieved by choosing the correct filtrations system and using filters at various stages. In these cases, it is necessary to do correct filter selection in order to have the desired air quality.
Hospital filtration requirements depend on the room’s clinical use, the applicable national rules and the project specification. Where DIN 1946-4 applies, use the current edition and amendments: DIN lists DIN 1946-4:2018-09 with Amendment A1:2025-11. The project designer should specify the required airflow, pressure relationships and filtration for each space. A filter class alone does not establish compliance for an operating room or intensive care area.It is very important to correctly design the operating room described in DIN 1946/4 and to select the appropriate filter.
The filter life is influenced by the choice of the filter at the appropriate number of, suitable capacity, suitable filtration area, suitable pre-filters and filtration speed. Filter that selected by considering these parameters, will help to reduce operational cost by reducing the energy need
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