- Donaldson Company
 - Develops and manufactures filtration and exhaust systems that help protect everything from equipment and engines to disk drives and fuel cells. - AAF International
- Manufacturer of commercial air filtration products and systems primarily for commercial, institutional, and industrial customers.
- Airguard
- Manufacturer of air filtration products for the commercial, industrial, and institutional markets.
- E.L. Foust Co.
- Air purification, water filtration, HVAC filters, and other products for residential and commercial applications.
 Micronair
- Specialists in dust and pollution control, filters and filtration, mineral fibre manufacturing, and practical ceramic technology for developing countries.- Glasfloss Industries, Inc.
- Air filters for industrial, commercial and residential applications.
- United Air Specialists, Inc.
- Manufacturer of commercial and industrial electrostatic precipitation air cleaning equipment and supplies.
- Air Filtration Products, Inc.
- Instrument fan filters and fan accessories.
- Dust Free
- Electrostatic air filter and air cleaner manufacturer.
- Solberg Manufacturing
- Manufacturer of industrial air filters for air compressors, blowers, and vacuum pump industries.
- Filters-NOW.com
- Offers custom air conditioner filters with Aprilaire filters from name brands.
- Koch Filter Corporation
- Manufactures commercial, industrial, hospital, and paint booth filtration systems.
- Power Aire, Inc.
- Offering inline air filters and more.
- CSR Industries, Inc.
- Manufactures the Cosa Tron contamination reduction system.
- Wheelabrator Air Pollution Control, Inc.
- Design and supply of air pollution control systems, fabric filters, precipitators, wet or dry scrubbers, and NOx control systems for industry.
- Flanders Corporation
- Designs, manufactures, and markets precision high performance filtration products. Flanders products are used by many industries, including semiconductors, ultra-pure material handling, biotechnology, pharmaceutical production, synthetics manufacturing, and the containment of airborne radioactive particulates in nuclear facilities.
- Isolate, Inc
- Hospital TB isolation units, odour control, HEPA air filtration, IAQ chemical air filter units, ultraviolet disinfection, air filtration, and air conditioning units.
- AirMaze
- Filtration solutions for controlling contamination.
- American Filtration
- Replacement filters for residential and commercial systems.
- Bruce Air Filters
- Specialises in air filtration products that are related to the HVAC, indoor air quality, and dust collection markets.
- Air Filter Service Company, Inc.
- Supplier of filtration products and services to utilities, commercial, and industrial customers.
- Cleanroom Filters & Supplies (CFS)
- Warehousing and distribution network carrying products for clean rooms such as replacement HEPA filters, prefilters, and laminar flow equipment.
- Pure Air Systems, Inc.
- Offering HEPA whole house filtration systems.
- Good Filter Company
- Manufacturers of polypropylene electrostatic, metal foil, metal mesh, and activated charcoal vapor filters.
- Filter Factory, The
- Engineers, designs, and manufactures filtration systems to customer specifications.
- Tri-Dim Filter Corporation
- Manufacturer of innovative air filtration products for a variety of applications.
 Delta Filtration
- Manufacturer of semi-finished air filtration products.- Bel-Aire
- Repair and parts for electronic air cleaners.
- Air-Care
- Manufacturer of air duct cleaning equipment and electrostatic air filters to remove pollen, dust, and other irritants. Also provides a list of duct cleaning technicians world-wide.
- Buy-Filters.com
- Offers a selection of dust collector filters, parts, and accessories for all dust collectors.
- Filtermist International
- Supplies oil mist filters to machine tool workshops and OEM's worldwide. Oil mist is removed before it enters the atmosphere and returned to the machine for re-use.
- AGET Manufacturing Company
- Manufactures Dustkop dust and Mistkop mist collectors, cyclone separators, baghouse filters, air filters, fans, bin vents, and duct systems.
- Air Flow Technology
- Manufactures all filters for paint spraybooths, industrial overspray applications, powder coating, HVAC, and is the U.S. distributor for Speritex downdraft diffusion media.
- Filters-for-Home
- Sells humidifier, air cleaner, furnace, and refrigerator filters.
- APC Filtration
- Filter design, engineering, and testing for original equipment manufacturers of industrial, commercial, and household appliances.
- Purex International
- Specialises in laser, solder, and welding fume and dust extraction and air filtration systems using HEPA filters.
- Columbus Industries, Inc
- Performance engineered air filter products.
- Altair Filter Company
- Manufacturer of advanced air filtration and silencing systems specialising in gas turbine technology.
- BWF America
- Advanced technology manufacturer and marketer of standard and specialised dust collector bags, liquid filter cloths, belts and covers, and a broad spectrum of filter media.
- Filtration Group Companies
- Manufacturer of a broad range of air and gas phase filtration products.
- Western Air Ducts
- Consultants, designers, manufacturers, and installers of industrial dust and fume extraction systems.
- Koby, Inc.
- Manufacturer of air filtration and purification products.
- Kleenair Group
- Manufactures a wide range of commercial air cleaners capable of eliminating almost any form of particulate pollution.
- Air Cleaners Inc. (ACI)
- Manufacturer of electrostatic air filters.
- Flanders/CSC
- Designs, manufacturers, and markets air filtration products.
- Air Kontrol Inc.
- Manufacturer of HVAC, appliance and dust collection air filters for residential, commercial, industrial and institutional applications worldwide.
- Air Filters, Inc.
- We carry HVAC, custom dust trap, and activated carbon disposable panel filters.
- IQS: Air Filters
- Directory of air filtration, HEPA, electrostatic, HVAC, industrial, activated carbon, and compressed air filters manufacturers.
- Standard Filter Corporation
- Developing and manufacturing a wide range of standard and custom filters.
- Voors Heating & Cooling Products
- Offers furnace filter replacements, humidifier pads, and air conditioner covers.
- CP Environmental Filters
- Manufactures and services a broad range of containment and collection systems for dust, fumes and the collection of dry particulate product.
- Newtron Products Company
- Manufacturer of electrostatic air filters, purifiers, and whole house carbon monoxide detectors.
- United Air Specialists (UK) Ltd.
- Provides solutions to air quality problems from interior air quality concerns in the office to welding smoke and process dusts in the factory.
- Sonic Dry Clean International
- Offers the Sonic Dry Clean System, which cleans diesel air filters with pressure-controlled air and intermittent sonic vibration.
- Aero-Flo Industries, Inc.
- Manufactures Poly-Flo washable air filter media and the Aero-Flo duct fan for hard to heat or cool rooms.
- Discount Filters
- Offering air intake, coalescing, and purification filters as well as synthetic compressor oil.
- Filter Services Illinois
- Furnace filters.
- Air Cleaning Technologies, Inc.
- Offers air filters, filtration systems, HVAC products, biochemical decontamination shelters, and more.
- Pollution Research
- Designers and manufacturers of self contained, non-electronic HEPA Clean Air Systems for residential, commercial and industrial applications.
- Air Solution Company
- Offering air intake filter systems, key components in environmental air management and cooling water maintenance systems.
- Bristol
- Features in-line sanitary, industrial, and custom filter housings.
- WorkPoint Environments Ltd
- Makers of the Airbench downdraught dust and fume extraction workbench.
- North-Monsen Company of Colorado, Inc.
- A manufacturer's representative specialising in dust control, powder process, bulk storage, and handling equipment. Providing dry material systems integration.
- Seil Co., Ltd.
- Manufacturers of humidifiers, air cleaners, electric fans, and accessories.
- Duststop Air Filters Inc
- Manufacturer of air filters specifically designed for home use.
- DISA
- Supplies air filter pollution control solutions, foundry moulding lines and equipment, and metal surface finishing systems.
- Ionizer
- Sells large and small room ionizers and offers information on health related issues.
- Robertson Manufacturing and Engineering International, Inc
- Makers of FilterMate air cleaners.
- Filt Air Ltd.
- Manufacturer of ULPA and HEPA filters and filtration products for cleanrooms, semiconductor manufacturing, biotechnology, hospitals, and food processing as well as protection against nuclear, biological, and chemical agents.
- FilterPro
- Services include cleaning and reconditioning of both bag and cartridge filters, new filter manufacturing, and testing and service of dust collection systems.
- NanTong Henka Air Filter Co.
- Manufactures HEPA filters for household air purification.
- OsKar Antipollution of America
- Industrial and automotive repair facility air cleaning and filtration equipment including fume arms and portable equipment for welding and industrial smoke and fumes.
- National Air Filter Service of New Jersey
- Provides MERV, UV-C, and HEPA air filters for IAQ, cleanroom, and containment dust collectors and scrubbers with testing, balancing, and certification services available.
- Airsan Corporation
- Designs and manufactures permanent and industrial air filters, grease filters, air filtration systems, and HVAC filters.
- Balston Industrial Filters
- Manufacturer of coalescing compressed air filters, sample filters, vacuum pump inlet and exhaust filters, high efficiency liquid filters, and more.
- Farr APC
- Manufacturer of industrial dust collectors and fume collection equipment to clean up manufacturing processes. Self-cleaning systems in a broad range of sizes are available.
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