Struggling to find a spiral duct manufacturer that delivers on quality, reliability, and value? You’re not alone. With so many options out there, choosing the right factory can feel overwhelming—and picking the wrong one can lead to costly headaches down the line. But what if you could easily compare the top manufacturers and make your decision with confidence? Discover which factories stand out, why it matters, and how the right choice can streamline your projects.

Ready to find your ideal supplier? Let’s dive in!

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Spiral Pipe and HVAC Duct Manufacturers | HVAC Spiral Pipe Supplier

HVAC Sheet Metal Duct Connectors | Spiral Ductwork Suppliers

Product Details:
SMC provides and fabricates custom high-efficiency commercial HVAC sheet metal systems and connectors, including spiral pipe and duct fittings, rectangular, flat oval, polyvinyl duct (PVS) exhaust systems, dampers, louvers, and the Complete Seal system (now offered in paint grip material). Products are made in the USA with various metals, and the Complete Seal system is designed for airtight performance.

Technical Parameters:
– Materials: galvanized, G-90 galvanized, paint grip, aluminum, stainless steel
– Product types: spiral pipe, duct fittings, rectangular duct, flat oval duct,
– Complete Seal system: engineered for superior airtight performance, available

Application Scenarios:
– Commercial and industrial HVAC installations
– Exposed ductwork applications where aesthetics and paintability are important
– Energy-efficient, airtight air distribution systems
– Projects requiring custom sheet metal fabrications and accessories

Pros:
– Wide range of durable, high-quality, and versatile sheet metal and polyvinyl
– Innovative solutions such as Complete Seal for reducing leakage and improving
– Competitive pricing with union-made, made-in-the-USA assurance
– Custom fabrication to suit specialized requirements

Cons:
– No specific mention of residential product support
– Technical parameters such as exact dimensions, pressure ratings, or

McGill AirFlow LLC

Product Details:
McGill AirFlow manufactures a comprehensive range of commercial and industrial sheet metal ductwork systems and accessories, including single-wall and double-wall round/flat oval duct and fittings, rectangular ducts, exposed ductwork, antimicrobial (SilverGuard™) ducting, self-sealing fittings (Uni-Gasket®), PVC-coated steel ductwork (Uni-Coat™), movable duct systems, terminal outlets, volume control dampers, access doors, leak detection equipment, pressurized enclosures, and HVAC silencers.

Technical Parameters:
– Single-wall and double-wall construction variants for round, flat oval, and
– Antimicrobial ductwork option (SilverGuard™)
– Polyvinyl-chloride-coated steel ductwork (Uni-Coat™) for corrosion resistance
– Self-sealing gasketed fittings (Uni-Gasket®) for improved airtightness

Application Scenarios:
– Commercial HVAC ductwork installations
– Industrial ventilation systems
– Environments requiring exposed duct aesthetics
– Projects demanding antimicrobial or corrosion-resistant duct solutions

Pros:
– Extensive product range engineered for performance and economy
– Pioneers in spiral duct and fitting manufacture, setting industry standards
– Nationwide fulfillment and support network (Duct Express and sales engineering
– Specialized product lines for improved hygiene (antimicrobial) and durability

Cons:
– Limited technical specifications visible without accessing detailed product
– Potential complexity in selecting from a wide product catalog without

Spiral Duct Manufactures Association – Home Page

Spiral Ductwork for Commercial Ducting Systems – HVACDirect.com

Spiral Duct and Fittings | MKT Metal Manufacturing

Product Details:
MKT manufactures spiral duct and fittings factory-fabricated to SMACNA standards, using materials such as G90 galvanized steel, aluminum, stainless steel, and specialty coatings. Products include spiral ducts, elbows, air-tites, take offs, bell-mouths, and various connection systems, offered in diameters from 3 to 100 inches and up to 20-foot lengths.

Technical Parameters:
– Diameters: 3″ to 100″
– Lengths: Standard 10-foot; custom up to 20-foot maximum
– Gauges: 18 to 26
– Materials: Galvanized, galvaneal (paint grip), aluminum, stainless steel, PCD

Application Scenarios:
– HVAC air distribution systems in commercial, industrial, and institutional
– Heavy, industrial applications (using angle rings and larger gauge/diameter)
– Situations requiring double wall insulated duct for sound and thermal insulation

Pros:
– Factory-fabricated to meet or exceed 3rd edition 2005 SMACNA Standards and
– Wide range of diameters, materials, coatings, and insulating options for
– Multiple connection types available (self-sealing, flanged, barrel clamp, etc.)
– Self-sealing and labor-saving connection options reduce installation time and

Cons:
– Some connection types require field or shop sealing, adding extra installation
– Heavy-duty or large-diameter/industrial applications may require additional

Commercial Duct Manufacturing, Installation & Maintenance

Product Details:
Turn Key Duct Systems manufactures and supplies commercial spiral round, flat oval, and rectangular duct systems (including long seam welded and oval duct systems) for HVAC and industrial applications. Their offering covers a broad range of fabricated duct products and materials to suit various specifications and project needs.

Technical Parameters:
– Single wall and double wall options for round and flat oval duct
– Spiral pipe sizes: 3”-30” diameter in 1-inch increments; 32”-84” in 2-inch
– Oval duct sizes: 4”-30” deep (minor axis)
– Material options: G90 galvanized steel, Paintgrip steel, 304/316 stainless

Application Scenarios:
– Commercial HVAC ductwork installations
– Large-scale industrial duct system projects
– Projects requiring specialty duct fabrication or custom sizes
– Construction projects across the southeastern U.S. and nationwide

Pros:
– Over 60 years of manufacturing experience in duct systems
– Wide range of materials, sizes, and insulation options offered
– Turnkey solution: includes estimation, CAD drawings, fabrication, inspection,
– Ductwork delivered to job site ready for easy installation

Cons:
– No explicit mention of residential duct offerings (focus is commercial/industria
– Specific pricing, lead times, or certifications are not stated

HOME | Spiral Products

Product Details:
Sheet metal fabricators specializing in spiral duct and also providing rectangular duct, primarily for the HVAC industry. Standard duct meets SMACNA 2005 standards, with custom fabrication available. Stock includes galvanized single wall spiral duct in a range of diameters and corresponding fittings.

Technical Parameters:
– Standard duct fabricated to SMACNA 2005 HVAC Duct Construction Standards
– Galvanized single wall spiral duct stocked in 4” – 24” diameters
– Custom fabrication to customer specifications

Application Scenarios:
– Commercial HVAC ductwork projects
– Residential HVAC ductwork installations
– Projects requiring rapid turnaround or custom duct specifications

Pros:
– Products are made in-house, allowing for faster lead times
– Stock of thousands of feet of duct and hundreds of fittings readily available
– Compliance with recognized industry standards (SMACNA 2005)
– Delivery available outside central North Carolina via in-house or private

Cons:
– Rectangular duct primarily suited for smaller commercial and residential
– Main service area is central North Carolina, requiring shipping arrangements

Spiral Ductwork – Airside Sheet Metal

Product Details:
Airside Sheet Metal Fabricators, Inc. manufactures spiral ductwork and fittings, including single-wall, lined, and double-wall spiral pipes, as well as spiral fittings such as elbows, tees, couplings, laterals, and square-to-round transitions. Products are made from metals sourced in the USA and can be custom-cut to required lengths, provided with slip fit or flanged connections. Stocked pipe sizes range from 4” to 26” in diameter, with made-to-order sizes available up to 60” diameter.

Technical Parameters:
– Diameters available: 4” to 60” (stocked sizes 4” to 26”)
– Standard pipe length: 10’ (can produce up to 20’), custom cut lengths available
– Material options: Galvanized, Galvanneal (paint ready), Polyvinyl Coated
– All fittings conform to SPIDA standards and are fit-tested for proper sizing

Application Scenarios:
– Large-scale HVAC installation projects requiring custom spiral ductwork
– Commercial, institutional, or industrial buildings needing high-quality,
– Projects requiring USA-made, code-compliant, and customizable duct solutions

Pros:
– Large daily manufacturing capacity supports even the largest install jobs
– Custom lengths and a wide range of diameters reduce field cutting and speed up
– Products conform to SPIDA standards and are quality fit-tested
– Metal options and availability of double wall and lined ductwork widens

Cons:
– Stocked fittings and pipes limited to 4”–26” diameter; larger sizes are made to
– Page does not specify energy efficiency or insulation properties
– Primarily supports projects requiring metal spiral ductwork; may not suit all

HVAC Spiral Duct Pipe & Fittings | Sheet Metal Connectors

Product Details:
Sheet Metal Connectors, Inc. (SMC) manufactures spiral pipe and duct fittings for commercial and industrial HVAC systems, including a range of connectors and fittings such as Complete Seal Fittings, E-Z Flange with Barrel Clamp, E-Z Flange Jr. with Barrel Clamp, Standard Spiral Pipe Connector, and Companion Angle Rings. The pipes are made from galvanized steel and can be joined by various methods for airtight and durable connections.

Technical Parameters:
– Spiral pipe formed from coil metal into rigid steel tube with a 4-ply spiral
– Single-wall spiral pipe has 2.5 times the resistance to crushing compared to
– Complete Seal fittings: available in 6” to 24” diameter; E-Z Flange Jr.: 6” to
– Fittings have various seams (stitch weld, lap seam, elbow lock seam, standing

Application Scenarios:
– Commercial HVAC ductwork installations where airtight and efficient duct
– Industrial HVAC systems requiring durable, high-rigidity spiral ductwork.
– Situations needing end connections with smooth interior surfaces for low

Pros:
– Smooth interior for low friction loss and improved airflow efficiency.
– Greater resistance to crushing and higher rigidity compared to conventional
– Variety of connection options for airtight and secure joints, including factory
– Complete Seal fittings feature an EPDM gasket for virtually airtight connection

Cons:
– Complete Seal Fittings are currently available only for galvanized fittings,
– For sizes over 60″ diameter, custom production may be required by calling the

Comparison Table

Frequently Asked Questions (FAQs)

How do I find reliable spiral duct manufacturers?
Start by searching online directories, industry forums, or trade websites for manufacturer listings. You can also attend HVAC trade shows or ask for recommendations from industry peers to identify established and reputable suppliers.

What should I consider when choosing a spiral duct manufacturer?
Consider the company’s experience, product quality, certifications, customization options, lead times, pricing, and after-sales support. Assessing their previous projects and customer reviews can also help determine reliability.

How can I verify a manufacturer’s quality standards?
Ask the manufacturer about their quality certifications, such as ISO or relevant compliance with industry standards. Request product samples, review their quality control processes, and check for third-party testing reports if available.

Is it better to choose a local or international spiral duct supplier?
Local suppliers usually offer quicker delivery and easier communication, which can be critical for time-sensitive projects. International suppliers might provide cost savings or unique products, but consider shipping times, import duties, and after-sales service availability.

Can I request custom sizes or designs from spiral duct manufacturers?
Yes, many manufacturers offer customization services for sizes, materials, and specific design features. Clearly communicate your requirements and verify that the manufacturer can accommodate your project needs before placing an order.