External motor, both for fire smoke can also be used for general ventilation. If equipped with two-speed motor, enabling fans usually for low-speed operation, as a general ventilation ventilation; and automatically converted to high-speed operation when the fire hoods wind chassis, used as fire smoke. Motor built-in wind chassis price, can only be used for general ventilation. Because B-type machine with respect to the A-type machine quieter best wind chassis manufacturers, so only when the fan is used for ventilation, may be preferred B-type machine. Fresh air ventilator air heat recovery, according to the type of air heat exchanger can be divided into plate, plate-fin, Rotary, and other types of heat pipe, heat recovery by nature into sensible heat recovery unit with total heat collector. Currently, the new wind ventilators on the market generally refers to the plate-fin air sensible heat recovery unit. Rotary also has full heat recovery products, but because of higher prices, the application is also less. Plate (plate-fin), a wholly foreign long heat recovery products, but the price is higher, the domestic manufacturers are said to have been developed. Exhaust air box _ _ rich wind chassis ventilation equipment provided by Dezhou Plumper ventilation plant. Dezhou Plumper ventilation plant (www.frtfsb.com) strong, credible, in Dezhou fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Plumper ventilation equipment into the brilliant and you work for a better future!