Langdon
Langdon, Inc. is a Cincinnati-based custom sheet metal fabricator founded in 1966, manufacturing ductwork and specialty metal products for commercial HVAC contractors, industrial facilities, building owners, and laboratories across the Midwest United States via direct project-based sales.
- Company typePrivate
- Founded1966
- HeadquartersCincinnati, United States
- Headcount11–50
- GTM typeB2B
- OfferingHardware or Manufacturing
What Langdon does
Langdon, Inc. (dba Langdon Sheet Metal) is a privately held, custom sheet metal fabricator founded in 1966 and headquartered in a 50,000 sq ft facility at 9865 Wayne Avenue, Cincinnati, Ohio. The company manufactures ductwork and related sheet metal products — rectangular, spiral/round, oval, double-wall, and welded duct — in materials including galvanized steel, galvanneal, stainless steel (304/304L/316/316L), aluminum (Type 3003), PCD (polyvinyl-coated), and AgION antimicrobial-coated steel, with capability spanning 26-gauge to quarter-inch plate using MIG and TIG welding. Core technology centers on three proprietary ductwork connection systems: Sure Seal Spiral (self-sealing EPDM gasket system rated to SMACNA Class 3), Sure Clamp Spiral (a granted patent on a clamp-together modular duct with silicone sponge gasket), and Sure Clamp Access (a patent-pending removable duct section enabling NFPA 80 fire damper inspection compliance).
Langdon operates a project-based B2B revenue model with quote-driven pricing, no public list prices, and a go-to-market anchored by direct phone/email sales through a Sales Manager, supported by a specification-driven website with downloadable catalogs, submittals, and code-compliance documentation aimed at engineers and contractors. Revenue is generated one project at a time from a horizontal mix of commercial HVAC contractors, industrial and pharmaceutical facilities, building owners managing NFPA 80 compliance, and laboratory/research facilities across the Midwest United States, with no disclosed distribution or reseller network. The company maintains a 500,000-pound raw material inventory to support short lead times, runs an in-house engineering and estimating department for custom applications, and produces specialty add-ons such as machine guards, sound attenuators, louvers, roof curbs, and stainless steel cladding.
Langdon firmographics
Firmographics- Name
- Langdon
- Legal name
- Langdon, Inc.
- Website
- https://langdonsheetmetal.com
- Company type
- Private
- Founded year
- 1966
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Langdon, Inc. is a Cincinnati-based custom sheet metal fabricator founded in 1966, manufacturing ductwork and specialty metal products for commercial HVAC contractors, industrial facilities, building owners, and laboratories across the Midwest United States via direct project-based sales.
- Ownership category
- akta.pro rank
Langdon industry classification
Industry- Product category
- Sheet Metal Ductwork Fabrication
- NAICS
- Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing (33341)
- SIC
- Industrial & Commercial Fans & Blowers & Air Purifing Equip (3564)
- akta.pro primary industry
- Dampers, Louvers & Ventilation Controls (IMADANAD)
Keywords
Where Langdon is headquartered
LocationHeadquarters
- HQ city
- Cincinnati
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
Langdon business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Personnel, Supply Chain, Operations, Infrastructure, Marketing or Sales
Revenue model
- Custom Ductwork Fabrication: B2B manufacturing of custom sheet metal ductwork and fittings. Projects are quoted based on customer specifications, drawings, and material requirements. Revenue is project-based with one-time purchase model for each fabrication order.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Pay-as-you-go | Custom Quote-Based Pricing |
Go-to-market motion1 record
Distribution channels1 record
Marketing channels3 records
Langdon product offering
Product offeringCore offering
Langdon, Inc. is a sheet metal fabricator that custom manufactures HVAC and industrial ductwork (rectangular, oval, spiral/round, double-wall, and welded configurations) along with specialty items such as machine guards, sound attenuators, louvers, and roof curbs. Operating from a 50,000 square-foot Cincinnati, Ohio facility since 1966, the company handles materials from quarter-inch plate to 26-gauge metal and maintains a 500,000-pound material inventory. Its offering is differentiated by patented/patent-pending connection systems — Sure Clamp Spiral, Sure Seal Spiral, and Sure Clamp Access — sold primarily to commercial HVAC contractors, industrial facilities, building owners, and laboratory/research facilities.
Product overview
Langdon, Inc. is a sheet metal fabrication company specializing in ductwork and related products since 1966. The company operates a 50,000 square foot facility in Cincinnati, Ohio, handling materials from quarter-inch plate to 26-gauge metal. Their product portfolio centers around three main patented ductwork connection systems: Sure•Clamp™ Spiral (clamp-together system), Sure•Seal™ Spiral (self-sealing system), and Sure•Clamp™ Access (fire damper access solution). Core products include rectangular, oval, spiral/round, and double-wall ductwork in various materials including galvanized, galvanneal, stainless steel (Types 304/316/316L), aluminum (Type 3003), and PCD (polyvinyl coated). Specialty offerings include welded custom fabrication, AgION antimicrobial-coated ductwork, zipper ductwork, stainless steel cladding, machine guards, and specialty items like sound attenuators, louvers, and roof curbs. The company also provides engineered custom applications and maintains SMACNA standards compliance across all products.
Differentiator
Problem solved
Functional benefit
Brands
- Sure Seal Spiral: Self-sealing spiral ductwork system designed for easy installation and reduced leakage, featuring patented dual-lipped EPDM rubber gasket technology
- Sure Clamp Spiral
- Sure Clamp Access
Products and services
- Rectangular Ductwork
Quantifiable outcome
- Class 3 seal rating per SMACNA HVAC Air Duct Leakage Test Manual for Sure Seal Spiral
- +2 more outcomes
Companies that use Langdon
Customer profileSegments4 records
Ideal customer profiles4 records
Langdon technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature4 records
Langdon partnerships and signals
Strategic signalScale indicators4 records
Recent moves5 records
Expansion highlights4 records
Langdon competitors and assessment
Company assessmentDirect peers
- AccuDuct: AccuDuct fabricates commercial HVAC ductwork and specialty sheet metal products, with comparable capabilities in rectangular, round, and welded ductwork across multiple materials.
- Sheet Metal Connectors: Sheet Metal Connectors manufactures commercial and industrial HVAC ductwork, fittings, and accessories — a direct comparator to Langdon's core rectangular, spiral, and specialty ductwork fabrication business.
- M&M Manufacturing: M&M Manufacturing produces commercial HVAC ductwork, fittings, and specialty items using galvanized, stainless, and aluminum — directly overlapping Langdon's material range and project-based fabrication model.
- Eastern Sheet Metal: Eastern Sheet Metal is a regional commercial HVAC ductwork and fabrication shop, operating on a comparable project-based, custom-fabrication model targeting HVAC contractors and industrial customers.
- McGill AirFlow: McGill AirFlow is a long-established commercial and industrial HVAC ductwork manufacturer with a comparable product breadth across rectangular, spiral, and welded ductwork for large-scale construction projects.
- Spiral Manufacturing: Spiral Manufacturing focuses on spiral pipe and fittings for HVAC and dust collection systems, overlapping with Langdon's spiral/round ductwork product line and serving similar contractor and industrial customers.
- Linx Industries: Linx Industries fabricates commercial HVAC ductwork, fittings, and specialty sheet metal products, competing head-to-head with Langdon for contractor and industrial accounts across multiple material types.
- RPR Products: RPR Products fabricates HVAC ductwork components and sheet metal specialties, comparable to Langdon in project-based custom fabrication serving commercial and industrial contractors.
Broad incumbents
- Selkirk: Selkirk (part of the Johnson Controls portfolio) is a large, established manufacturer of commercial and residential chimney, venting, and HVAC ductwork products — a broader incumbent with overlapping categories but wider geographic reach.
- Johns Manville: Johns Manville is a large building products manufacturer with insulation, air-handling, and HVAC system offerings, serving as a broader incumbent whose engineered solutions overlap with Langdon's HVAC ductwork market.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat3 records
Key risks6 records
Key highlights6 records
Customer concentration
Langdon social profiles
Digital presenceLangdon financial estimates
Financial estimateRevenue estimate
Valuation estimate
Langdon leadership team
Management profileNumber of profiles
Langdon funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Langdon M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Langdon
What does Langdon do?
Langdon, Inc. is a sheet metal fabricator that custom manufactures HVAC and industrial ductwork (rectangular, oval, spiral/round, double-wall, and welded configurations) along with specialty items such as machine guards, sound attenuators, louvers, and roof curbs. Operating from a 50,000 square-foot Cincinnati, Ohio facility since 1966, the company handles materials from quarter-inch plate to 26-gauge metal and maintains a 500,000-pound material inventory. Its offering is differentiated by patented/patent-pending connection systems — Sure Clamp Spiral, Sure Seal Spiral, and Sure Clamp Access — sold primarily to commercial HVAC contractors, industrial facilities, building owners, and laboratory/research facilities.
Is Langdon a public or private company?
Langdon is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was Langdon founded?
Langdon was founded in 1966. It employs 11 to 50 people.
Where is Langdon based?
Langdon is headquartered in Cincinnati, United States, in the North America region.
How does Langdon make money?
One revenue line is on record: custom Ductwork Fabrication.
Who are Langdon's main competitors?
Direct peers on record are AccuDuct, Sheet Metal Connectors, M&M Manufacturing, Eastern Sheet Metal, McGill AirFlow, Spiral Manufacturing, Linx Industries and RPR Products. Broad incumbents are Selkirk and Johns Manville.
Does Langdon have an API?
No public API is recorded for Langdon.
What industry is Langdon in?
Langdon's product category is Sheet Metal Ductwork Fabrication. Its primary akta.pro industry code is IMADANAD, Dampers, Louvers & Ventilation Controls. Its NAICS code is 33341 and its SIC code is 3564.