What is air movement measured in?

Answer 1

Air movement is measured using anemometers. Air speeds inside a building tend to be relatively low, usually less than 1 m/s. This means the anemometers used for this purpose have to be much more sensitive than those used in weather stations measuring wind. There are two main types of internal anemometer, those based on a small propeller and those based on the cooling of a hot metal wire exposed to the air. Propeller based systems tend to be a little less sensitive at very low air speeds, however bearing technology and ultra-lightweight materials are increasingly proving this to be incorrect. Below is a picture of a anemometer.

Answer 2

CFM cubic feet per minute for air operated tools and such. The heating and air conditioning folks use a device held up too an air register to measure the volume of air coming through. I believe that is also Cubic Feet per minute.

Answer 3

Air movement is typically measured in units of velocity, such as meters per second (m/s) or feet per minute (fpm). These measurements quantify the speed at which air is moving within a space.