There is a complex formula used to measure the volume of air needed. The measurement unit is CFM. CFM stands for cubic feet per minute. CFM is the amount of air that passes through a device. In this case the device is an air purifier.
The amount of the air volume is determined by the size of the fan and motor. The amount of resistance caused by the filter also plays a role. The size of the inlet and outlet also come into the equation. A large fan will move more air than a small fan. A dense filter may trap more particles. However it will reduce the volume of air. An air purifier maybe cute and small but not be able to produce enough clean air.
LakeAir has several models each designed for a different size area. The noise levels vary from unit to unit. The filter that allows the most air to pass through while cleaning the most is an electrostatic filter. We recommend this technology most often for low noise, best cleaning efficiency and highest volume of clean air.