Opsinox
Opsinox is a Belgian manufacturer of certified stainless steel chimney and flue gas extraction systems for residential and multi-unit HVAC applications, serving installers, contractors, and project developers across Belgium through direct technical sales and custom RVS fabrication from its Nazareth facility.
- Company typePrivate
- Founded1958
- HeadquartersNazareth, Belgium
- Headcount11–50
- GTM typeB2B
- OfferingHardware or Manufacturing
What Opsinox does
Opsinox is a Belgian manufacturer of stainless steel (inox/RVS) chimney and flue gas extraction systems, founded in 1958 in Wortegem and headquartered at Venecoweg 22 in Nazareth, East Flanders. The company designs and produces single-walled, double-walled insulated, concentric, and flexible stainless steel pipe systems for residential and multi-unit collective HVAC applications, plus prefabricated aluminium roof caps (Combikap). Its portfolio includes patented collective systems — Opsinox Triple Flow (OTF), CSG, and Opsivent — that allow multiple heating appliances across different floors to share a single chimney shaft, addressing space and efficiency constraints in apartment buildings. Manufacturing takes place in-house at the Nazareth facility, which is ISO 9001:2015 certified and operates an over-2-hectare site equipped with modern stainless steel forming machinery, including a dedicated flexible-conduit line added in 2023.
The company's revenue model combines one-time product sales from a standard catalogue (DW, EW, GASCO, FLEX, EWP1, DWP1, GALVA, EMAIL, PELLET, CSG, STAAL/ACIER, OTF, OPSIVENT, OpsiReno) with project-based custom fabrication sold via a dedicated opsinox-maatwerk.be unit. Pricing is quote-driven rather than list-priced, with custom products always produced to specification. Distribution is entirely domestic Belgian and direct: a regional sales team with technical expertise engages contractors, installers, architects, and project developers, complemented by an inside-sales function handling inbound enquiries via contact forms and phone.
Opsinox serves three primary segments: residential installers and contractors needing certified chimney systems; multi-unit residential buildings requiring collective CLV systems; and architects/project developers requiring bespoke solutions. Reference projects span real estate (Royal Gardens Blankenberge, La Réserve Knokke, Kattendijkdok Antwerp, Ardea Brussels, Stuyvenberg Loppem, Zandparel Wenduine), healthcare (Militair Hospitaal Ostend), hospitality (Linne et Plantes Brussels), municipal infrastructure (Central Stookplaats Leuven), and energy (biomass installations in West Flanders). Since 2015, the company has been controlled by the Anne Santens family, which also owns Lecot and previously acquired NV Pronox.
Opsinox firmographics
Firmographics- Name
- Opsinox
- Legal name
- Opsinox
- Website
- https://opsinox.com
- Company type
- Private
- Founded year
- 1958
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Opsinox is a Belgian manufacturer of certified stainless steel chimney and flue gas extraction systems for residential and multi-unit HVAC applications, serving installers, contractors, and project developers across Belgium through direct technical sales and custom RVS fabrication from its Nazareth facility.
- Ownership category
- akta.pro rank
Opsinox industry classification
Industry- Product category
- Chimney and flue gas extraction systems
- NAICS
- Heating Equipment (except Warm Air Furnaces) Manufacturing (333414), Power Boiler and Heat Exchanger Manufacturing (332410)
- SIC
- Heating Equipment, Except Electric & Warm Air Furnaces (3433)
- akta.pro primary industry
- Heat Exchangers, Coils & Hydronic HVAC Components (IMADANAF)
- akta.pro secondary industries
- Water Heater/Boiler Flue, Venting & Chimney Liner Service (HSAOACAF), Louvers, Vents & Architectural Grilles (IMADAIAM)
Keywords
Where Opsinox is headquartered
LocationHeadquarters
- HQ city
- Nazareth
- HQ country
- Belgium
- HQ region
- Europe
Offices1 record
Markets served
Opsinox business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Supply Chain, Personnel, Operations, Technology or R&D, Infrastructure, Marketing or Sales
Revenue model
- Stainless steel chimney and flue gas products: Manufacture and sale of stainless steel chimney systems, including single-walled pipes, double-walled insulated pipes, flexible liners, pellet stove pipes, and concentric systems. Revenue is generated through direct product sales to installers, contractors, and end customers. Both standard catalog products and custom-made solutions are offered.
- Custom RVS manufacturing: Custom stainless steel chimney solutions manufactured to specification based on technical drawings or consultation. Custom orders represent a significant portion of the product offering through opsinox-maatwerk.be.
- Technical consulting and project support: Expert technical advice provided by the sales team and technical engineers. Professional consultation is offered for project development, system selection, and installation guidance. This advisory service supports product sales.
Go-to-market motion1 record
Distribution channels3 records
Marketing channels6 records
Opsinox product offering
Product offeringCore offering
Opsinox manufactures stainless steel chimney and flue gas extraction systems for HVAC applications in residential and collective buildings, including single-walled pipes, double-walled insulated pipes, flexible liners, pellet stove pipes, concentric systems for gas fireplaces, and aluminum roof caps. The company also produces patented collective flue gas systems (OTF, CSG, Opsivent, CLV/3CEP) for multi-unit apartment buildings, and offers bespoke custom stainless steel fabrication from technical drawings. Products are made in Belgium at the Nazareth facility and supplied primarily to installers, contractors, and project developers across Belgium.
Product overview
Opsinox is a Belgian manufacturer specializing in innovative quality solutions for HVAC applications and flue gas extraction. The product portfolio consists of three main categories: (1) HVAC Solutions including CLV collective chimneys (3CEP systems), Triple Flow (OTF) patented collective systems, OPSIVENT concentric ventilation, OpsiReno renovation solutions, and SANINOX connection fittings; (2) Flue Gas Disposal products including single-walled (EW) and double-walled (DW) stainless steel pipes, GASCO concentric systems for gas fireplaces, flexible FLEX liners, pellet stove pipes (EWP1, DWP1), enamel-coated (EMAIL), galvanized (GALVA), and CSG collective gas systems; and (3) Roof Caps including COMBIKAP aluminum multi-outlet systems. The company also offers custom RVS (stainless steel) fabrication through its dedicated maatwerk service. All products are manufactured in Belgium (Nazareth) with ISO9001-2015 quality certification.
Differentiator
Problem solved
Functional benefit
Brands
- OpsiReno: Solutions for renovations
- Opsinox Triple Flow (OTF)
- Opsivent
- Saninox
- DWP1
- EWP1
- FLEX
- Combikap
- Gasco
- CSG
- OpsiShunt
Products and services
- CLV Schouw (3CEP)
Quantifiable outcome
- Double-walled pipes operate at temperatures up to 450°C
- +5 more outcomes
Companies that use Opsinox
Customer profileNamed customers13 records
Segments3 records
Ideal customer profiles3 records
Opsinox technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature11 records
Opsinox partnerships and signals
Strategic signalScale indicators5 records
Recent moves12 records
Expansion highlights4 records
Opsinox competitors and assessment
Company assessmentBroad incumbents
- Viessmann: Viessmann is a major German manufacturer of heating, industrial, and refrigeration systems. While not a direct chimney competitor, Viessmann's heating systems often specify flue gas components compatible with Opsinox-style stainless steel systems, making it an adjacent industry player.
- Vaillant: Vaillant is a large European heating and hot water equipment manufacturer. Comparable as a broader incumbent in the heating systems space that interfaces with flue gas extraction products like Opsinox's.
- Bosch Thermotechnology: Bosch Thermotechnology manufactures heating and hot water solutions across Europe. As a broad incumbent in residential heating, its products are compatible with and often installed alongside flue gas extraction systems like Opsinox's.
Direct peers
- Schiedel: Schiedel is one of Europe's largest manufacturers of stainless steel chimney and flue gas systems, including single-walled, double-walled, and collective CLV solutions. Directly comparable to Opsinox in product range, customer base (installers, residential and commercial builders), and technical specifications.
- Dinak: Dinak is a Spanish manufacturer specializing in modular stainless steel chimneys and flue gas systems for residential and industrial applications. Direct competitor to Opsinox in double-walled insulated pipes and CLV/collective systems.
- Poujoulat: Poujoulat is a leading French manufacturer of metal chimney flues and flue gas extraction systems, including flexible liners and collective systems. Directly competes with Opsinox in stainless steel chimney components across Western Europe.
- Burgerhout: Burgerhout is a Netherlands-based manufacturer of flue gas and ventilation systems, including concentric and double-walled chimneys. Direct competitor to Opsinox in the Benelux region with overlapping product offerings.
- Muelink & Grol: Muelink & Grol is a Dutch manufacturer of stainless steel chimney and flue gas extraction systems, serving the Benelux market. Closely comparable to Opsinox in geography, product range, and customer base.
- Jeremias: Jeremias is a German manufacturer of chimney and flue gas systems, offering single-walled, double-walled, and concentric stainless steel pipes plus collective systems. Closely comparable to Opsinox in product mix and target customer segments.
Regional players
- Ontop (Ontop Metal Products): Ontop is a stainless steel chimney manufacturer operating in adjacent regional markets. Comparable to Opsinox in product type and end-user applications, though with a different geographic footprint.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks7 records
Key highlights7 records
Customer concentration
Opsinox social profiles
Digital presenceOpsinox compliance and trust
Trust signalCompliance4 records
Opsinox financial estimates
Financial estimateRevenue estimate
Valuation estimate
Opsinox leadership team
Management profileNumber of profiles
Opsinox subsidiaries and ownership
Company hierarchySubsidiaries2 records
Opsinox funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Opsinox 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 Opsinox
What does Opsinox do?
Opsinox manufactures stainless steel chimney and flue gas extraction systems for HVAC applications in residential and collective buildings, including single-walled pipes, double-walled insulated pipes, flexible liners, pellet stove pipes, concentric systems for gas fireplaces, and aluminum roof caps. The company also produces patented collective flue gas systems (OTF, CSG, Opsivent, CLV/3CEP) for multi-unit apartment buildings, and offers bespoke custom stainless steel fabrication from technical drawings. Products are made in Belgium at the Nazareth facility and supplied primarily to installers, contractors, and project developers across Belgium.
Is Opsinox a public or private company?
Opsinox is a private company. It is classified as family owned and is currently operating.
When was Opsinox founded?
Opsinox was founded in 1958. It employs 11 to 50 people.
Where is Opsinox based?
Opsinox is headquartered in Nazareth, Belgium, in the Europe region.
How does Opsinox make money?
Three revenue lines are on record. Stainless steel chimney and flue gas products are the primary driver. The others are custom RVS manufacturing and technical consulting and project support.
Who are Opsinox's main competitors?
Broad incumbents on record are Viessmann, Vaillant and Bosch Thermotechnology. Direct peers are Schiedel, Dinak, Poujoulat, Burgerhout, Muelink & Grol and Jeremias. Ontop (Ontop Metal Products) is listed as a regional player.
Does Opsinox have an API?
No public API is recorded for Opsinox.
What industry is Opsinox in?
Opsinox's product category is Chimney and flue gas extraction systems. Its primary akta.pro industry code is IMADANAF, Heat Exchangers, Coils & Hydronic HVAC Components, with a secondary code of HSAOACAF, Water Heater/Boiler Flue, Venting & Chimney Liner Service. Its NAICS code is 333414 and its SIC code is 3433.