Duro Dyne
Duro Dyne is a U.S.-based manufacturer and distributor of HVAC air distribution, duct fabrication, and HVACR repair parts and tools, sold under the Duro Dyne and Supco brands to HVAC technicians, duct fabricators, and commercial refrigeration service contractors across North America.
- Company typePrivate
- Founded1952
- HeadquartersBay Shore, United States
- Headcount101–250
- GTM typeB2B
- OfferingHardware or Manufacturing
What Duro Dyne does
Duro Dyne is a U.S.-based manufacturer and distributor of HVAC air distribution and duct fabrication components, founded in 1952 and headquartered in Bay Shore, New York. The company operates a dual-brand portfolio: the Duro Dyne brand covers duct assembly hardware, flexible duct connectors, access doors, volume dampers, fire/smoke dampers, zone control systems, and duct fabrication machinery; the Supco brand covers HVACR test instruments (including temperature and pressure chart recorders), capacitors, controls, motors, fittings, refrigeration parts, and appliance replacement parts. Together the catalog spans air distribution, duct fabrication, HVACR repair, test instrumentation, and installation consumables, serving HVAC technicians, duct fabricators, and commercial refrigeration service contractors across North America.
Duro Dyne generates revenue through B2B hardware sales via its e-commerce storefront at durodyne.com, dedicated phone order lines, and a network of HVAC distributors. Following its October 2025 acquisition by Lennox International (NYSE: LII) for approximately $550 million as part of NSI Industries' HVAC division, the company now also distributes through Lennox's commercial parts network, the LennoxPros digital platform, and a new 763,000 square foot Regional Distribution Center in Edgerton, Kansas. The acquisition converts a long-tenured independent parts platform into a brand within a public-company HVAC OEM's aftermarket parts strategy.
Duro Dyne firmographics
Firmographics- Name
- Duro Dyne
- Legal name
- Durodyne
- Website
- https://durodyne.com
- Company type
- Private
- Founded year
- 1952
- Operating status
- Operating
- Headcount range
- 101–250 employees
- Short description
- Duro Dyne is a U.S.-based manufacturer and distributor of HVAC air distribution, duct fabrication, and HVACR repair parts and tools, sold under the Duro Dyne and Supco brands to HVAC technicians, duct fabricators, and commercial refrigeration service contractors across North America.
- Ownership category
- akta.pro rank
Duro Dyne industry classification
Industry- Product category
- HVAC Parts and Supplies Distribution
- NAICS
- Industrial and Commercial Fan and Blower and Air Purification Equipment Manufacturing (333413), Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing (33341), Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use (334512), Electrical Equipment Manufacturing (33531)
- SIC
- Industrial & Commercial Fans & Blowers & Air Purifing Equip (3564), Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (3585)
- akta.pro primary industry
- Ductwork, Duct Fittings & Air Distribution (Diffusers/Grilles/Registers) (IMADANAC)
- akta.pro secondary industries
- Ventilation, Ducting & Air Distribution Equipment (IMAHAKAG), HVAC Equipment (Heating, Cooling & Air Handling) (IMAHAKAB), Compressors, Refrigeration Components & Condensing Units (IMADANAG)
Keywords
Where Duro Dyne is headquartered
LocationHeadquarters
- HQ city
- Bay Shore
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
Duro Dyne business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Supply Chain, Operations, Personnel, Marketing or Sales, Infrastructure
Revenue model
- HVAC Parts and Supplies Distribution: Duro Dyne generates revenue through the sale of HVAC parts, supplies, and tools. The company sells air distribution components, duct fabrication materials, HVACR tools and test instruments, and installation supplies to HVAC technicians and fabricators. Following its acquisition by Lennox International for approximately $550 million, Duro Dyne operates as a brand platform within Lennox's expanded commercial parts availability strategy.
Go-to-market motion1 record
Distribution channels2 records
Marketing channels3 records
Duro Dyne product offering
Product offeringCore offering
Duro Dyne manufactures and distributes HVAC air distribution and duct fabrication components under the Duro Dyne brand, and HVAC/R repair tools, test instruments, and replacement parts under the Supco brand. The product portfolio includes volume dampers, access doors, fire dampers, flexible duct connectors, duct assembly hardware, chart recorders, sensors, capacitors, motors, fasteners, and installation supplies for HVAC technicians and fabricators serving residential and commercial markets.
Product overview
Duro Dyne is an HVAC distribution company operating as part of NSI Industries, offering a comprehensive portfolio of HVAC products under two main brands: Duro Dyne (duct fabrication and air distribution) and Supco (HVAC and refrigeration repair). The product portfolio includes duct fabrication components (cleats, flanges, flexible connectors, machinery), air distribution products (access doors, fire dampers, volume dampers, zone control), HVAC/R components (electrical parts, capacitors, motors, valves), installation supplies (fasteners, clamps, ties, chemicals), HVACR testing tools (chart recorders, sensors, test instruments), and appliance replacement parts. The company serves HVAC technicians and fabricators with time-saving, dependable products for residential and commercial markets.
Differentiator
Problem solved
Functional benefit
Brands
- Duro Dyne: Duct fabrication and air distribution products for HVAC technicians and fabricators
- Supco
Products and services
- Air Distribution Products
Quantifiable outcome
- Duro Dyne and Supco acquisitions expanded Lennox's commercial parts availability significantly
Companies that use Duro Dyne
Customer profileNamed customers3 records
Segments1 record
Ideal customer profiles3 records
Duro Dyne technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature5 records
Duro Dyne partnerships and signals
Strategic signalPartnerships
One partnership is on record.
- Lennox InternationalcoreLennox International acquired the HVAC division of NSI Industries, which includes the Duro Dyne and Supco brand platforms, for approximately $550 million in cash. The acquisition was announced on October 19, 2025, and is expected to strengthen Lennox's offerings in HVAC parts and supplies for residential and commercial markets across North America. The deal was subsequently enhanced with strategic investments in distribution capabilities including a new 763,000 sq ft Regional Distribution Center in Edgerton, Kansas.
Scale indicators2 records
Recent moves4 records
Expansion highlights5 records
Duro Dyne competitors and assessment
Company assessmentDirect peers
- Carnes Company: Mid-sized manufacturer of grilles, registers, diffusers, dampers, and air terminal devices. Directly comparable to Duro Dyne's air distribution and volume damper products.
- Metal Industries (MII): Manufacturer of HVAC grilles, registers, diffusers, and air distribution products. Comparable commercial and residential SKU overlap with Duro Dyne's air distribution portfolio.
- Thermaflex: Manufacturer of flexible duct and insulation products. Directly competes with Duro Dyne's flexible duct connector and duct fabrication/insulation offerings.
- Hart & Cooley: Long-standing manufacturer of HVAC registers, grilles, diffusers, and air distribution components. Direct competitor to Duro Dyne's air distribution product line for residential and light commercial HVAC markets.
- Titus (Johnson Controls): Manufacturer of air distribution products including diffusers, grilles, registers, and terminal units. Closely overlaps with Duro Dyne's air distribution and zone control categories for commercial HVAC.
- Price Industries: Major manufacturer of air distribution and ventilation components (grilles, diffusers, plenums, terminal devices). Comparable to Duro Dyne's commercial air distribution and duct fabrication offerings.
- DiversiTech: Wholesale distributor and manufacturer of HVACR parts, accessories, and installation supplies. Directly comparable to Supco's HVACR parts and Duro Dyne's install supplies portfolio serving HVAC contractors.
Emerging players
- Refrigeration Technologies: Manufacturer of HVACR service chemicals, coil cleaners, and specialty maintenance products. Comparable to Supco's chemicals and HVACR repair product lines for service technicians.
- RectorSeal: Manufacturer of specialty HVACR chemicals, sealants, accessories, and install supplies. Overlaps with Duro Dyne's HVAC install supplies category (chemicals, fasteners, sealants).
Broad incumbents
- CaptiveAire: Larger manufacturer of commercial kitchen ventilation systems with proprietary duct fabrication. Overlaps with Duro Dyne's duct fabrication and air distribution products but operates at broader kitchen-exhaust scale.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat4 records
Key risks5 records
Key highlights5 records
Customer concentration
Duro Dyne social profiles
Digital presenceDuro Dyne financial estimates
Financial estimateRevenue estimate
Valuation estimate
Duro Dyne leadership team
Management profileNumber of profiles
Profiles1 record
Duro Dyne subsidiaries and ownership
Company hierarchySubsidiaries2 records
Duro Dyne funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Duro Dyne 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 Duro Dyne
What does Duro Dyne do?
Duro Dyne manufactures and distributes HVAC air distribution and duct fabrication components under the Duro Dyne brand, and HVAC/R repair tools, test instruments, and replacement parts under the Supco brand. The product portfolio includes volume dampers, access doors, fire dampers, flexible duct connectors, duct assembly hardware, chart recorders, sensors, capacitors, motors, fasteners, and installation supplies for HVAC technicians and fabricators serving residential and commercial markets.
Is Duro Dyne a public or private company?
Duro Dyne is a private company. It is classified as corporate owned and is currently operating.
When was Duro Dyne founded?
Duro Dyne was founded in 1952. It employs 101 to 250 people.
Where is Duro Dyne based?
Duro Dyne is headquartered in Bay Shore, United States, in the North America region.
How does Duro Dyne make money?
One revenue line is on record: HVAC Parts and Supplies Distribution.
Who are Duro Dyne's main competitors?
Direct peers on record are Carnes Company, Metal Industries (MII), Thermaflex, Hart & Cooley, Titus (Johnson Controls), Price Industries and DiversiTech. Emerging players are Refrigeration Technologies and RectorSeal. CaptiveAire is listed as a broad incumbent.
Does Duro Dyne have an API?
No public API is recorded for Duro Dyne.
What industry is Duro Dyne in?
Duro Dyne's product category is HVAC Parts and Supplies Distribution. Its primary akta.pro industry code is IMADANAC, Ductwork, Duct Fittings & Air Distribution (Diffusers/Grilles/Registers), with a secondary code of IMAHAKAG, Ventilation, Ducting & Air Distribution Equipment. Its NAICS code is 333413 and its SIC code is 3564.