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This section provides an overview for ducts as well as their applications and principles. Also, please take a look at the list of 38 duct manufacturers and their company rankings. Here are the top-ranked duct companies as of December, 2024: 1.Pacific Duct Inc, 2.Avani Environmental Intl., Inc, 3.Texas Duct Systems, L.L.C.
Table of Contents
Postdoctoral researcher, conducting research on the production of cathode composite particles for solid-state batteries in the Equipment Engineering Group of Osaka Prefecture University.
Belongs to the Resource and Energy Recycling Laboratory, Nagaoka University of Technology, and conducts research on the development of DDR-type zeolite membranes for CO2 separation and the capture of CO2 from digestion gas generated from sewage treatment plants.
https://researchmap.jp/eiji-hayakawa
Thesis
https://doi.org/10.3390/membranes11080623
http://www.ijcea.org/index.php?m=content&c=index&a=show&catid=109&id=1177
https://www.sciencedirect.com/science/article/abs/pii/S1387181119305529?via%3Dihub
https://www.sciencedirect.com/science/article/abs/pii/S138358661833154X?via%3Dihub
A duct is an air conditioning system and refers to an air passageway. They are used for ventilation, air conditioning, and smoke exhausts in buildings, as well as for large machines to exhaust internal heat and impurities.
There are various types of ducts, and their sizes and materials vary depending on the installation location and intended use.
Ducts are used for the ventilation and air conditioning of buildings.
By using a blower or other device to create a flow inside the building and then ventilating it outside through ducts, fresh air, and temperatures can always be maintained inside the building.
There are two types of ducts: square ducts and round ducts. The uses of each are explained below.
Square ducts are used in straight and curved sections and are considered to have higher exhaust performance than round ducts. Therefore, they are used in kitchens, where a lot of exhaust air is required.
Round ducts are stronger and are used in places where durability is required, such as housing complexes and offices.
First, let us start by explaining the difference between "ducts" and "piping. The biggest difference between "ducts" and "pipes" is that "ducts" allow only airflow, while "pipes" allow not only air but also water, various gases, and other fluids to pass through. Another difference is that "piping" tends to be a large-scale operation, whereas "ducting" is a simple operation.
The following is a list of the four main materials used for ducts.
Care must be taken when installing ducts, especially regarding bends and slopes. Bends should be minimized as much as possible, extreme bends should be avoided. The length should be as short as possible because bends cause turbulence and resistance to airflow. In addition, ducts should be sloped because condensation can cause water to accumulate in the ducts. Ducts also make noise due to vibration, etc., so it is necessary to use reinforcement materials to prevent noise.
There are various shapes of duct outlet/intake ports.
In office buildings and department stores, ceiling-mounted air outlets called "amonestats" are the standard, and they are available in round or square shapes. Amonestats have a cross-sectional structure with multiple overlapping wings, and the air that is blown out radiates, spreading the air throughout the room.
A "garage" is widely used at the intake port for taking in outside air. To prevent rainwater from entering outdoor use, the structure is fitted with drainage and water-return wings. Since they are used outdoors, weather-resistant and durable materials such as stainless steel are used. In addition, measures must be taken to install stainless steel netting to prevent insects and birds from entering.
In addition, various other types of blowing and intake ports are used according to the purpose. This includes the nozzle type to deliver air widely in large spaces such as gymnasiums and the universal type with movable wings attached.
Duct installation also requires attention to the following four points.
Loss resistance in ducts obstructs the internal airflow and increases the air-blowing power, resulting in wasted energy.
The first step is to make the duct length as short as possible. In addition, supply and exhaust ports, branches, and bends create large loss resistance, so these should be minimized as much as possible. Nevertheless, unreasonable duct connections create significant loss resistance. Therefore, it is important to avoid forced connections while minimizing distances and bends and branches as much as possible.
Condensation may occur in ducts in some cases. Condensation in ducts can lead not only to corrosion of the ducts but also to electrical leakage and fire due to water entering a crisis through the ducts. To prevent this, a slope may be provided to drain the water in the ducts to the outside.
If ducts are installed incorrectly, vibration from blowers and other motors can be transmitted to the ducts, causing vibration and noise, so these measures are necessary.
One of the countermeasures is to install "deflection joints" to prevent equipment vibration from being transmitted to the ducts. In addition, by using "flexible ducts" with a bellows structure at the connection, not only can vibration be suppressed, but they can be used in locations where installation is difficult because they can be flexibly bent. Noise reduction can also be achieved by installing a sound-deadening box. The sound deadening box is filled with rock wool or glass wool inside to provide sound absorption and muffling functions.
*Including some distributors, etc.
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Avani Environmental Intl., Inc, established in 1997 in Pismo Beach, California, USA, excels as a manufacturer and supplier of cutting-edge clean air solutions. The Company’s extensive product range includes mist collectors, dust collectors, welding booths, portable fume collectors, and downdraft tables. Their products cater to diverse industries including welding, grinding, laser/plasma cutting, robotic system fume extraction, and corrosive/explosive dust scenarios. The company aims to provide effective filtration solutions that protect individuals from the adverse effects of dust, smoke, gas, and air impurities. By ensuring air quality and worker safety, Avani Environmental enhances healthier work environments globally.
Pacific Duct Inc. was established in 1996 in Southern California and is a manufacturer of lock-seam, high-pressure spiral pipes, and fittings. The product portfolio of the company includes Round Ducts & Fittings, Rectangular Ducts, Custom Fabrication, Connectors & Hangers, Grilles & Registers, and many more. The company also has two online duct calculators where clients can calculate the rectangular duct to round equivalent and vice versa. The company has access to doors, zip ties, and other HVAC contractor supplies fully stocked in “Will Call” department of the company.
Texas Duct Systems, L.L.C., operates as a custom duct manufacturer that was founded in 1980 and headquartered in Houston, Texas, USA. The company specializes in sheet metal, spiral, and fiberglass duct fabrication, serving the residential, commercial, and industrial markets. Playing a significant role in the development of single-wall internally insulated spiral pipe and accessories, It utilizes 1" fiberglass duct board. When used as a spiral internal liner, duct board offers acoustical and thermal performance, discourages the growth of mold, fungi, and bacteria on the air stream surface, and significantly reduces costs compared to double-wall or K27 spiral duct.
Bay Rubber Company, established in 1952 and based in California, USA, is a manufacturer and distributor of commercial and consumer rubber products and components. The company is a fabricating distributor and contract manufacturer of custom products to serve industries like aerospace, chemical and healthcare. It produces rubber products and components including the assembly of fluid transfer systems, industrial hoses and seals. The company can produce original designs and drawings created by the customers through its CAD/CAM cutter and C02 laser processing technology.
ACMT, Inc., founded in 1896, is a manufacturer of OEM components, adhesives & chemicals, and airframe structures, The OEM components include brackets, compressor shrouds, seals, liners, and vane segments, as the airframe structures include firewalls, door assemblies, air inlet ducts, and window frames used in formatting & packaging, commercial, military, and rotor aircraft sectors. The company in Progress Drive Manchester, CT, provides maintenance, Repair, and Overhaul(MRO) on gas turbine equipment and accessories using technologies such as laser cutting, hot & cold forming, riveting, milling, and surface coating.
Augusta Fiberglass, since 1974, is a manufacturer of custom-designed fabricated fiberglass and reinforced plastic products such as tanks, pipes & ducts, hoods, stacks & stack liners, and scrubbers used in chemical, food & beverage, mining, industrial and pharmaceutical industries. Located in Blackville,SC, the company offers field services such as emergency repair & maintenance, erection of vessels, inspection & modifications, fabrications and site surveys by equipped and RTP-1-certified workers. The company has an ASME RTP certificate and hence can stamp vessels with the RTP mark.
RCF Technologies is a manufacturer and supplier of advanced aerospace components, established in 1975, and headquartered in Vidalia, Georgia. Their products include seals, ducting, insulation materials, couplings, and specialty items such as non-metallic clamps, isolation mounts, as well as small gasket-type seals that drop into counter-sunk bolt holes to prevent leakage. These products find applications in industries such as aerospace, automotive, marine, and sports equipment manufacturing, specializing in high-temperature applications, including bleed air, APU, and anti-icing.
Markair, Inc. was founded in 1988 in Jacksonville, Florida. Markair is a consultant and manufacturer’s representative offering services for industrial manufacturing, ship yards, power plants, water & wastewater, and food manufacturing among other industries. Markair serves customers with ability to maintain OSHA compliance, project budgets and appropriations, ascertain equipment specifications, create applications and maintenance solutions, create custom-designed equipment, provide turn-key installation, perform field surveys of existing systems to determine performance, and offer recommendations for ventilation system designs. Markair also offers full products lines to fulfill orders for equipment and system designs and installation.
MKT Metal Manufacturing is an American sheet metal duct and HVAC products manufacturer founded in 2004 and based in York, Pennsylvania. The company offers various sheet metal ductwork products in different shapes and materials, as well as HVAC products and rooftop accessories that secure or protect exposed HVAC components and parts. Their products are utilized by clients in construction and architectural development, as well as in the medical and industrial sectors. MKT also provides custom fabrication services for demanding projects requiring high temperature, pressure, or corrosion resistance.
Lambert Jones Rubber Co., established in 1957, and headquartered in Pittsburgh, Pennyslvania, is a manufacturer of rubber components for various industries. Their product range includes conveyor belt, gaskets, and sheet rubber. Their products find utility in industries such as automotive manufacturing, aerospace engineering, and general industrial applications. These components are crucial for sealing and preventing leaks, ensuring efficiency and safety in machinery and equipment. Lambert Jones Rubber Co. adheres to quality standards.
STAFCO, founded in 1952 and located in Indiana, USA, is a manufacturer and supplier of industrial storage tanks, serving diverse industries worldwide. They offer a wide range of storage tanks, including aboveground, underground, and mobile tanks. These tanks find applications in industries such as oil and gas, agriculture, manufacturing, and chemical processing. STAFCO's products are designed to store liquids such as petroleum, water, chemicals, and hazardous materials, ensuring safe and efficient storage solutions.
Plastic Design, Inc. was founded in 1976 and is based in North Chelmsford, Massachusetts. The company is a manufacturer of equipment commonly used in industries such as biomedical, pharmaceutical, microelectronics, and photonics. The company achieved ISO 9001:2015 certification in 2018. The company’s products include wet process equipment, industrial systems, life sciences machinery, clean room storage, and more. The company also offers precision welding and machining services as well as plastic welding services for CNC plastic machined parts.
ABC Sheet Metal traces its roots to 1870 and is headquartered in Anaheim, California. The company provides cutting and shaping services to several industries including aerospace, defense, medical, packaging, and construction. The company is AS9100 and ISO 9001 certified, assuring aerospace, defense, and other industry customers of build quality. The company’s cutting and shaping services include laser and water jet cutting, forming & rolling, welding, and CNC machining and punching. The company takes full advantage of 2D and 3D CAD for sheet metal engineering to reduce manufacturing labor and material expenses.
Johnson Bros. Metal Forming Company was founded in 1947 in Chicago, Illinois as a manufacturer of roll-forming machines. Today the company is based in Berkeley, Illinois, and has a much-expanded product line serving industries such as agriculture, communications, glass, sports products, and woodworking. The company’s roll-forming capabilities include compatibility with materials such as brass, aluminum, titanium, and other metals. The company is capable of manufacturing products as varied as framing, hats, wireways, tubing, and cable trays.
Spiral Manufacturing, established in 1962, and headquartered in Minneapolis, Minnesota, is a manufacturer and supplier of spiral pipe and high pressure products in various forms for project and industrial needs. Their product range includes spiral ducts, fittings, and accessories. These products are used in HVAC (Heating, Ventilation, and Air Conditioning) systems for efficient air distribution, ventilation, and ductwork installations in various residential, commercial, and industrial buildings for optimal airflow, energy efficiency, and improved indoor air quality in industrial and commercial settings.
Emco Industrial Plastics, LLC. (Emco) has operated out of Cedar Grove, New Jersey for over 30 years. The company is a manufacturer and distributor of custom industrial plastics, rubber, and foam-based products for medical grade plalstic, food & beverage, chemical processing, and OEM industries. Some of the materials the company engineers are industrial plastics, neoprene, natural rubber, polyurethane, and natural sponge. The company offers services such as cutting to size, laser cutting, plastic welding, and injection molding. The company also manufactures custom machined components.
ACFM was established in 1977 and is based in East Templeton, Massachusetts. ACFM is a distributor and full-service provider of clean air solutions for dust & fume projects for customers in New York State and New England regions. ACFM offers on-site service, fabrication, and installation of systems and components. Additional services include troubleshooting, project management, engineering consultation, and customer service. ACFM’s primary products include extraction arms, industrial fans & blowers, and dust collection systems.
Established in 1976, The Clean Air Company has been providing high-quality air purification services to manufacturing facilities, vehicle maintenance, and office space. Their main purpose is to improve indoor air quality by filtering or exhausting various pollutants that threaten employees' health. Known for their exceptional services, the clean air company has faithfully served Delaware, Pennsylvania, Connecticut, New York, and New Jersey, residents. In the pursuit of providing clean air, they have been helping businesses remain safe, lucrative, and compliant by reducing insurance, maintenance, and energy costs.
Flexa, established in 1947 in Hanau, Germany, is a manufacturer of cable protection conduits and cable protection systems for various applications. The company specializes in protective conduits for sensor cable wires, EMC shielding, and suction hose systems. Their product range includes cable conduits, cable glands, cable fittings, cable protection hoses, and flexible cable conduits. These products are designed to provide efficient cable management and protection in various industries, including automotive, machinery, electrical, and construction. The cable protection solutions offer multiple benefits, such as safeguarding cables from mechanical stress, protecting against moisture and dust, and ensuring optimum cable routing.
Kowa Kasei Co., Ltd. was founded in 1969 and is a manufacturer and supplier of profile extrusion molding products, electric wiring member, and EMC components based in Nagoya, Aichi, Japan. The company's product portofolio including wiring ducts, birdie cutters, wiring protection tubes, noise protectors, and EMC protective tubes. The products have been certified to be RoHS compliant. The company have obtained the ISO 9001 certification in 2002 and ISO 14001 certification in 2003.
Precisioneering DKG Corp., established in 1964 as Precisioneering Ltd., is an Ontario, Canada-based manufacturer that specializes in fiberglass equipment and currently operates as a subsidiary of Group DKG Corp., another Canadian company. Under its FRP product line, Precisioneering offers tanks that are designed to secure corrosive liquids or food products from contamination, as well as wet scrubbers to handle air-borne gas, fume, or particle contaminants. Precisioneering also provides ventilation system installation encompassing hoods, covers, and ducts. Additionally, the company provides grating using fiberglass reinforced plastic and base resins. Precisioneering serves various industries, including automotive, mining, fertilizer, pulp and paper, and waste treatment.
IPEX by Aliaxis is headquartered in Oakville, Ontario. IPEX is a producer of pipe-related solutions defined in 6 categories: municipal, plumbing & mechanical, industrial, electrical, PE electrofusion, and irrigation. The company's municipal solutions include pressure piping and sewer piping systems in addition to specialty products. Plumbing & Mechanical solutions also include fire protection, gas venting systems, and potable water systems. Compressed air and acid waste systems are used in industrial systems. Light fixtures and ducts are keystones of the electrical solutions segment.
AQC Dust Collecting Systems, Inc., founded in 1992, is a manufacturer of dust collectors, source capture equipment, and industrial dampers for high-pressure and volume control. The source capture equipment includes pivoting extension booms, exhaust hose drop systems, fume arms for extraction and source capture, portable filtration units, and ceiling-mounted air filtration units. The company in Bois-des-Filion, QC, provides solutions to welding fume extraction, automobile exhaust, food & beverage, pharmaceutical, and manufacturing industries.
Heyco Products, founded in 1926 and headquartered in Toms River, New Jersey, is a manufacturer and designer of molded wire protection products and stamped electrical components. The company provides a diverse range of products, such as top rail clips, liquid-tight cord grips, and strain relief bushings. Additionally, it offers services including prompt product delivery, maintenance and repair assistance, and warranties. These products are applied in various industries, including nuclear power, electrical appliances, and construction.
Nestro Lufttechnik GmbH, established in 1977 in Thüringen, Germany, is a manufacturer of filter technology solutions. Ranked among the largest three system specialists for extraction and filter technology in Europe, the company also provides solutions for downstream heating, surface engineering, and sorting and disposal. It utilizes CAD/CAM/CIM fabrication processes to ensure precise component and system dimensions. Quality assurance adheres to DIN EN ISO 9001:2015 standards, with additional services encompassing inspection and maintenance.
ADP.corp., located in Corona, California, is a manufacturer of HVAC sheet metal fittings in the southwestern United States. The company's air duct products are crafted from galvanized materials, ensuring quality, and some of its products include angles, boots, boxes, caps/ends, collars, as well as couplings, curbs, dampers, and filter bases. Operating from facilities in California and Arizona, the company utilizes automated machinery capable of crafting a diverse array of duct-related items from premium sheet metal fittings. One of its processes employs laser precision guided by lean carbon arms operated through rotary motors.
Palladino Metal Fabrication, Inc. is a manufacturer and supplier of custom metal fabrication and welding services and the company is based in Pennsylvania, United States and was established in 1936. Palladino Metal Fabrication offers a range of products, such as sheet metal, structural steel, aluminum, and stainless steel, in various shapes and sizes. The company also provides design, engineering, assembly, and installation services for its clients. The products are used for various purposes, such as industrial, commercial, agricultural, and residential applications. Palladino Metal Fabrication is loyal to customer satisfaction and quality standards.
Action Metal Fabricators, Inc., since 1979, has been a manufacturer of sheet metal, plate, structural and bar products located in Conyers, Georgia. The products include exhaust systems, material handling carts, machinery guards, custom concrete forms, and custom ducts & fittings used in manufacturing, automotive, aerospace, processing, and industrial sectors. The company offers services such as metal fabrication, design & engineering, welding, laser cutting, and forming to produce flashing, including step flashing, gravel stops, drip edges, hat channels, and roof caps.
Otto Hopfinger & Sons, Inc., established in 1952 and located in Hustisford, Wisconsin, is a custom manufacturer specializing in fiberglass products. Their product line includes housings, ductwork, piping, machine guards, and insulation caps, providing durability, protection, ventilation, and insulation for various industries including industrial, recreational, signage, safety, and agriculture. They offer a range of capabilities including pattern making, fabrication, injection molding, fiberglass restoration, and repair services, and have received the ACMA Pioneer Award.
J.C. MacElroy Company, Inc., founded in 1932 and headquartered in Piscataway, New Jersey, is an American manufacturer specializing in custom metal fabrication and fasteners. As an American Institute of Steel Construction (AISC)-certified company, MacElroy offers a range of products, including architectural, ornamental, and structural metal products, as well as components for mechanical equipment. They also provide durable and non-corrosive fiberglass products. Additionally, MacElroy offers bollards and cleats for landscapes and waterfronts, as well as fenders for protection in marine environments. The company's subsidiary, Steel Technologies Corp., another American company, supplies standard and specialty hardware, including industrial, construction, railway, and marine fasteners.
Rees-Memphis is based in Memphis, Tennessee. REES designs, manufactures, and installs industrial air systems providing industrial dust collection, pneumatic conveying, and ventilation solutions for a variety of processing industries such as food, pharmaceuticals, textiles, and ceramics. REES offers a full line of standard products and custom fabrication. Product examples span lines of production including feed hoppers, pneumatic receivers, machine guards, and housing. REES builds complete systems such as dust collection, conveying, grinding, and transfer of wood pellets for lumber mills and dust collection facilities for large automobile factories. REES offers additional services such as surveying, designing, installing, maintenance, repair, and rebuilding.
Southern Metal Fabricators was founded in 1991 and is headquartered in Albertsville, Alabama. The company is a manufacturer of custom-fabricated metal and a provider of related custom services. The company’s product categories include bulk storage, material access, and material handling. Bulk storage products include hoppers, silos, and storage bins. Material access products include industrial platforms, ladders, and stairs. Material handling products include custom carts, conveyor bridge trusses, and steel ladles. The company’s services include ductwork pollution control, custom welding services, and all aspects of metallic fabrication from design to cutting to finishing.
Nordfab Americas serving North and South America was incorporated in 1979 in Thomasville, North Carolina, following the original Nordfab brand which was introduced in 1973. The ISO 9001:2015 and ISO 14001:2015 certified company is a manufacturer of dust collection and ducting equipment used in woodworking, schools, coffee roasting, metalworking, and other markets with ventilation needs. The company’s products include Quick-Fit Clamp Together Ducting including pipes and hangers, QFS Sealed Ducting, and Flanged Ducting which includes blast gates, l hose assemblies, and assemblies.
FläktGroup, formed through the merger of FläktWoods and DencoHappel in 2016 and headquartered in Herne, Germany, is a manufacturer and supplier of indoor air technology solutions. The company's products include heat pumps, precision air conditioners as well as fan coils, and offers services such as air treatment, conditioning, and diffusion. It serves consultants and architects, installers and contractors, and property owners. The company's products find applications in the oil and gas, data center, and pharmaceutical industries.
Driescher is a manufacturer of low- and medium-voltage switchgear and related devices established in 1995 and headquartered in Moosburg an der Isar, Germany. The company primarily produces switchgear rated for voltage ranges between 0.4 kV to 52 kV. It also offers outdoor switchgear DRI-MOS for railway applications, indoor switches for railway lines, and UM/UH outdoor actuators for motordrive or remote control applications. The company’s products are mainly used in Europe’s energy utilities, rail, and industrial sectors.
The Tin Knockers Industrial, established in Oshawa, ON, in 1997, is a supplier of commercial & industrial air pollution control systems. Their product portfolio includes vehicle exhaust systems, dust collectors, ventilation systems, and spray booths. Their products find applications in manufacturing facilities, car dealerships, fire and ambulance stations, public works stations, and welding shops. The company also provides services such as dust collection, vehicle and fire station vehicle exhaust extraction and techinical services.
Ranking as of December 2024
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | Pacific Duct Inc |
11.0%
|
| 2 | Avani Environmental Intl., Inc |
10.3%
|
| 3 | Texas Duct Systems, L.L.C |
6.4%
|
| 4 | ACMT, Inc. |
5.6%
|
| 5 | MKT Metal Manufacturing |
5.4%
|
| 6 | Bay Rubber Company |
5.1%
|
| 7 | Markair, Inc. |
3.9%
|
| 8 | Augusta Fiberglass |
3.8%
|
| 9 | RCF Technologies, Inc. |
3.4%
|
| 10 | Palladino Metal Fabrication, Inc. |
3.0%
|
Derivation Method
The ranking is calculated based on the click share within the duct page as of December 2024. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
United States of America
|
18 | 66.7% |
|
Canada
|
4 | 14.8% |
|
Germany
|
3 | 11.1% |
|
Japan
|
2 | 7.4% |
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