CFM is the standard measurement of airflow volume, indicating how many cubic feet of air pass a fixed point in one minute. In the HVAC world, CFM is the most important number for determining if a room will be properly cooled or heated. For example, a typical 3-ton system requires approximately 1,200 CFM of airflow to operate at peak efficiency. When installing Ducted systems, technicians use flow hoods to measure the CFM at each register to ensure the air is balanced. If the CFM is too low, the Evaporator Coil may freeze; if it is too high, the air will move too fast to be properly dehumidified. Our Mobile Home Air Handler units are rated for specific CFM outputs to match various home sizes. Understanding the CFM needs of your space is essential when selecting Fans or air purifiers. It is the core metric used by engineers to design comfortable and healthy indoor environments.