... ' HQ, about 60sets) Features Shell: new-type reinforced engineering PP plastic,strong,ageing resistant, UV-cut. Can fit with dust filter ... . Motor:iron casting,durable, anti-oxidant, fast heat dissipation, long using life. Aluminum sealed motor: 3-phase, 2-speed; self-cooling ... wind discharge for choose, the pirce is a little higher. plastic axial evaporative air cooler, 30000CMH