●Product Features：
 ◎High dust-holding capacity
 ◎Low resistance
 ◎Panel Filters use light panel structure and good polyester synthetic fibers. Low initial

    resistance and good fire resistance.

 ◎Efficiency：G3、G4（EN779)

●Structure：
 ◎Use panel structure frames (paper, galvanized, aluminium, stainless steel) and ABS plastic

   or aluminum alloy coners,  to assure steable structure.

 ◎Use net-cover polyester fiber as material which makes our products have lower resistance

   and higher dust-holding capacity.

●Applications：
 ◎Pre-filtration of general air conditioner and ventilation system, to avoid inner pollution of 

   dust collecting.
 ◎Pre-filtration of large air compressor.
 ◎Filtration of central ventilation& recirculation air conditioner system in clean rooms. Extend 

   service life of next step high-efficiency filters.

 ◎Pre-filtration of ventilation system in general plants, reach standards for normal clean air 

   requirements.

●Specifications：