Saw this rating as I was comparing different cooling fans. I don’t understand this definition at all. Millimeters of Water Column is a low range metric pressure unit derived from the hydrostatic pressure of 1mm head of water at 4 degC. 1 millimeter of water gauge equals 9.80665 pascals.
In: 1
Millimeters of Water Column (mmWC) is a unit of measurement used to describe air pressure or airflow resistance in ventilation, heating, and cooling systems. It is based on the hydrostatic pressure of a 1mm column of water at 4 degrees Celsius, and is commonly used in HVAC (Heating, Ventilation, and Air Conditioning) systems to measure the static pressure drop across ducts, filters, and other components.
When used in the context of cooling fans, millimeters of water column (mmWC) is used to measure the static pressure that the fan generates. This pressure is measured in millimeters of water column at the point where the fan is generating airflow. This static pressure is important because it helps determine how well the fan can push or pull air through an obstacle, such as a filter or radiator.
So, in short, the higher the mmWC rating of a cooling fan, the more pressure it can generate and the more effective it will be at moving air through obstacles.
Latest Answers