Early effect filter ventilation aluminum frame metal frame fiber pre-filter plate air ventilation and air conditioning systems 1. common pre-filter. 2. high quality chemical fiber filter, dust capacity. 3. metal frame. 4. Thickness: available 17mm, 21mm, 25mm, 46mm, and other various thickness. 5. The method of artificial weight average dust filtration efficiency: 45% -95% (ASHRAE52.1-1992) 6. filtration efficiency rating:.. G1-G4 (EN779) 7. welded wire grille using surface rust treatment, can be well fixed linear pleated structure, whereby in use the filter is not easily deformed. 8. The filter and the sealant frame to ensure that the junction can be filtered through a filter of air, to prevent the air leakage phenomenon filter occurs at the connection with the outer frame. 9. barbed wire fixed linearly pleated filter structure with high dust holding capacity. Shaped pleated filter structure can take full advantage of the filter area to improve its dust holding capacity. Early effect filter paper box standard pleated pre-filter plate 1. Thickness: 4 inches (95mm), 2 英寸 (44mm), 1 英寸 (22mm). 2. cotton fiber / fiber hybrid nonwoven filter, high-temperature high-quality cardboard frame. 3. artificial dust filtration efficiency average weight method: 45-95% (ASHRAE52.1-1992). The filtration efficiency rating:. G1-G4, please call: Mrs S --- 183 2088 7932 q: 3110637615 Inner early efficiency filter efficiency filters Inner Mongolia Inner Mongolia in the early effect of filter efficiency filters in Inner Mongolia Inner Mongolia Inner primary filter Inner Mongolia in the early efficiency filter efficiency filter efficiency filters in Inner Mongolia, Inner Mongolia, Inner Mongolia in the early effect of filter efficiency filters