Negative-pressure air fan
Main functions: ventilation, exhaust smoke , exhaust odour
Features: low investment cost, large volume of air, low noise, low energy consumption, stable operation, long life, high efficiency and so on. Shutters can be dustproof, waterproof, beautiful and generous. It is the best choice for cooling and ventilation in modern workshop. Negative pressure Fan with Environmental Protection and Energy Saving will become the mainstream of ventilation and cooling equipment Market

Application scope of negative pressure Fan:
 
A, suitable for high temperature or odorous workshop: such as heat treatment plant, casting factory, plastic factory, aluminum mill, shoe factory, leather factory, electroplating factory, printing and dyeing factory, Various chemical factories.
B, suitable for labor-intensive enterprises: such as clothing factories, various assembly workshops, Internet cafes,
C,gardening greenhouses, ventilation cooling, livestock pasture cooling.
D, especially suitable for the need to cool down and need a certain amount of humidity. Such as cotton mills, woolen mills, hemp mills, weaving mills, chemical fiber factories, through the factory, bomb factory, knitting factory, silk weaving factory, socks factory and other textile mills.
E, suitable for storage and logistics field
 

★★★Technical parameters★★★

The main models:
★1380*1380*400mm 1.1 kW,
★1220*1220*400mm 0.75 kW,
★1060*1060*400mm 0.55 kW
★ 900*900*400mm 0.37 kW.
All the galvanized plate square negative pressure fans are 450 rpm, 4 pole 1400 / min, motor protection grade IP44, B grade insulation.

★★★Advantage★★★

1.Set ventilation, cooling in one
2.Energy saving: low power consumption, only 10% to 15% of traditional air conditioning
3.Environmental protection: Freon free(CFC)
4.The cooling effect is good : after the outside air enters the room through the cooling water curtain , the indoor temperature on the side of the cooling water curtain can reach the cooling effect of 5 - 10 degrees
5.Investment cost recoverable within 2 to 3 years of high return on investment. 
6.Quickly replace the turbid, sultry and odorous air out of the room
7.Control indoor environment effectively, produce different wind speed indoors, cause cool wind effect, make people feel unusually comfortable and refreshing.
8.Reduce Infectious Diseases and effectively prevent the spread of Influenza and other viruses in large areas. 
 

★★★The project of the exhaust fan★★★

FAQ 
Q: Are you trading company or manufacturer ?
A: We are factory and we also have our trading company .
Q: How long is your delivery time?
A: Generally it is 20-30 days after order.
Q: Do you provide samples ? is it free or extra ?
A: Yes, we could offer the sample for free charge but do not pay the cost of freight.