How often should the medium-efficiency filter of the medical screen supply air outlet be replaced?

The replacement cycle of the medium-efficiency filter at the medical screen supply air outlet is affected by various factors. Generally speaking, it is recommended to replace it every 3 to 6 months, but the actual replacement time needs to be adjusted according to the following situations:
Usage environment: If the pollution level in medical facilities is relatively high, such as near construction sites or industrial pollution areas, with a large amount of dust and impurities in the air, the load on medium-efficiency filters will increase, and the replacement cycle may need to be shortened to 2-3 months. In relatively clean environments, such as the high-end ward areas of some specialized hospitals, the replacement cycle can be appropriately extended to 4 to 6 months.
Usage frequency: In frequently used areas such as operating rooms and intensive care units, the air conditioning system operates for a long time, and the filtration capacity of the medium-efficiency filter is relatively large. It needs to be replaced every 3 to 4 months. If the general ward is used less frequently, it can be replaced every 4 to 6 months.
Filter resistance: It is more scientific and accurate to determine the replacement time by monitoring the resistance of the filter. When the resistance of the filter reaches 1.5 to 2 times the initial resistance, the filter should be considered for replacement. The resistance changes can generally be monitored in real-time by installing differential pressure gauges before and after the filter.
Air quality requirements: For some special departments with extremely high air quality requirements, such as organ transplant wards and blood disease wards, to ensure patient safety, even if the filters do not meet the above replacement conditions, preventive replacement may be carried out every 3 to 4 months depending on the actual situation.
In actual use, the medium-efficiency filter should be inspected and evaluated regularly, and the replacement cycle should be flexibly adjusted according to specific circumstances to ensure the normal operation of the medical screen supply air outlet and the air purification effect.