Bellows fresh air ventilation models used to generate wind power equipment, consisting of a wooden box, a wooden sliding wooden handle and activities constituted. The operator manually opened the activities wooden plate fresh air ventilation, air through the inlet port to make leather bellows sack filled with air, but not collapse, then pull its body can be pushed out of the air within the air by lose wind pipe heat fresh air ventilation machine, you can enter a new smelting furnace air ventilator, for iron. The most common form of the wooden, rectangular wooden boxes constitute activity for the blast so strong fire. 1. The new wind ventilators for the room with a small ventilation with heat recovery equipment. The main control parameters for the selection of air flow, static pressure loss, the outlet total pressure, input power, effective ventilation rate, exchange efficiency, noise and the like. Fresh air ventilation models _ _ plump fresh air ventilator ventilation equipment provided by Dezhou Plumper ventilation plant. Dezhou Plumper ventilation plant (0) 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!