Wall mounted ventilator fan also named window exhaust fan, is a kind of ventilating device that is installed onto wall or window, could be used for ventilating, exhausting, desiccating and deducting. it is with a characteristics of extra quite, easily installed, large air delivery, large using range, e.t.c. As a kind of new top class product for modern life, blind ventilation is applicable in kitchen and bathrooms of residential buildings, commercial building (shops), hotels, restaurants, motels, entertainment places and so on. it could also be used as a matching device of an air conditioner. it is durable and reliable. Great deal, Great Price!