High efficiency particulate air filter, or HEPA, can achieve filtration efficiencies of more than 99.97% for 0.1 μm and 0.3 μm. Air can pass through, but fine particles cannot, often in places where there is a high demand for clean air.
W-type high-efficiency filter adopts no separator design, forming a "V" or "W" shaped structure, made of low-resistance ultra-fine glass fiber filter paper or synthetic filter media, frame often ABS or PVC plastic type. Compact and reasonable structure, large effective filtration area, can operate at high wind speed, suitable for the end of air conditioning equipment, negative pressure end of exhaust air purification system and ventilation duct.