As a professional manufacturer of air filters with ISO9001 and ISO14001, Nanjing Blue Sky Filter Co.,Ltd. has the rich experiences to produce the following air filtering products. 1. Dust bags / air filters for vacuum cleaners2. Air filters for Air purifiers/ Air scrubbers / Air Cleaners / Humidifiers / Dehumidifiers and so on appliances.3. Refrigerator Air Filters to absorb the odor and smell4. Cooker Hood Air Filters to absorb the grease5. Automobile air filters.6. Advanced air filters for medical units.7. Big size air filters for room and building's ventilation indoor air improvement and any other usage.8. Filters and filter bags as the replacements for industrial machines and equipments Our products are various with different materials and shapes from low efficiency to HEPA grade according to the clients' designs and specifications.And our company can produce according to EN779, EN1822 and ASHRAE.Meanwhile, our technical team is ready to develop any new air filtering product with the client for residential, commercial and industrial usage.