... owns many patent protected technologies. Provide amount of fresh air on any time, multi-air purifier, ... and recursive air, it can setup percentage of fresh air from 0~100% expediently. As protected by patent ... mountedCore TypeGilled tubeFanAxialEvaporatorTypeFiberglas, Roof mountedCore TypeGilled tubeFanCentrifugalAir intakeWith fresh air mixture deviceMulti-air purifierActivated carbon, light catalyst ...