JH series is the brand new design with dual air inlet and the concept of module type in order to maximize the CADR to 300m3/hr and 400m3/hr for just a desktop size unit of JH-A300 and JH-B400. By compare to the price quote of USD 41 of JH-A300 and USD 48 of JH-B400 against the CADR, the ex-factory price is just HALF of the other's factories air purifiers with the same CADR value. By comparing to the same size of air purifier in the market, the CADR is more than a double of other's factories air purifiers.