Kolb Industrial Boiler Service

What Kolb Industrial Boiler Service does

Kolb Industriekessel Service GmbH is a German industrial boiler service company headquartered in Dillenburg that plans, modernizes, and maintains steam, hot water, and thermal oil boiler systems for industrial customers across Germany. The company operates a full-lifecycle service model covering 3D-CAD planning and laser-scanning site assessments, in-house AD 2000 HP0-certified welding and pressure-vessel fabrication, modernization and retrofit project execution, scheduled maintenance contracts, 24/7 emergency repair, TÜV coordination, and outsourced plant operation management (Betriebsführung). A proprietary Kolb Kesselsteuerung (KKS) boiler control system and a mobile/containerized boiler plant offering (in partnership with Eco Steam and Heating) round out the product portfolio, alongside dedicated services for 44. BImSchV emissions compliance and hydrogen-ready alternative-energy preparation.

The company serves approximately 650 maintenance customers ranging from small SMEs to DAX-listed corporations (Volkswagen, Coca-Cola, Continental) and municipal utilities (Stadtwerke Weißenfels, Kempen, Naumburg; ENVIA Mitteldeutsche Energie), spanning food and beverage, chemicals, healthcare, energy supply, and industrial manufacturing verticals. Revenue is generated through a mix of recurring maintenance subscriptions, bespoke modernization projects, managed plant operation fees, mobile-boiler rentals and sales, and certified welding/repair work; pricing is custom-quoted in all streams and not publicly disclosed.

Kolb Industriekessel Service GmbH is a wholly owned subsidiary of Kolb Anlagenbau GmbH under family ownership led by shareholder Jochen Kolb, with Philipp Schiffer as Managing Director. The current legal entity was formed in 2021 when Kolb Anlagenbau acquired the former OMNICAL Industrieservice GmbH (previously Viessmann Industrial Service), though operating history traces back to 1952 (Neuhütte/Buderus Werk Omnical). Operations are conducted from four German locations—Dillenburg (HQ), Landsberg (Saalekreis), Berlin, and Kerpen—with 36 employees in the service entity and 60+ across the combined Kolb Group, which generates approximately EUR 15 million in annual revenue.

Name

Kolb Industrial Boiler Service

Legal name

Kolb Industriekessel Service GmbH

Website

https://kolb-service.de

Company type

Private

Founded year

1952

Operating status

Operating

Headcount range

11–50 employees

Short description

Kolb Industriekessel Service GmbH is a German industrial boiler service provider that plans, modernizes, and maintains steam, hot water, and thermal oil systems for 650+ industrial customers from SMEs to DAX-listed corporations across Germany. Family-owned under Kolb Anlagenbau GmbH, it offers full-lifecycle service from 3D-CAD planning to 24/7 maintenance.

Ownership category

akta.pro rank

Product category

Industrial Boiler Services

NAICS

Power Boiler and Heat Exchanger Manufacturing (33241), Boiler, Tank, and Shipping Container Manufacturing (3324)

SIC

Fabricated Plate Work (Boiler Shops) (3443), Heating Equip, Except Elec & Warm Air; & Plumbing Fixtures (3430)

akta.pro primary industry

Boilers, Furnaces & Process Heating Equipment (IMAHAKAD)

akta.pro secondary industry

Refractory, Furnace & Kiln Maintenance Services (IMAIACAG)

Keywords

• Industrial boiler service
• Steam boiler maintenance
• Boiler plant engineering
• Boiler modernization
• Pressure equipment welding

Headquarters

HQ city

Dillenburg

HQ country

Germany

HQ region

Europe

Offices4 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Supply Chain, Technology or R&D, Marketing or Sales

Revenue model

1. Maintenance and Repair Services: Recurring revenue from scheduled maintenance contracts, repair services, burner maintenance, water treatment, and chimney/condensate trap servicing. The company reports over 650 maintenance customers, indicating a significant recurring revenue base. Includes 24/7 emergency/breakdown service.
2. Planning and Engineering: One-time project revenue from engineering and planning of new boiler plant installations. Includes 3D laser scanning, needs assessment, system design, and regulatory compliance documentation (TÜV, 44. BImSchV).
3. Modernization and Construction: Project-based revenue from boiler plant modernization, retrofit, and new-build installations. Projects include demolition, installation of replacement boilers, piping, control systems, and burner upgrades. Revenue is lumpy and project-dependent, with references to multi-unit retrofits worth significant cost.
4. Plant Operation Management: Revenue from operating customer boiler plants on an ongoing basis (Betriebsführung). Customers outsource the operation of their plants to Kolb's qualified personnel, generating recurring service fees.
5. Mobile Boiler Rental and Sales: Revenue from rental and sale of mobile/containerized boiler plants. Offered in various power ranges from <36kW to >2500kW, for steam and hot water, with optional energy supply.

Pricing tiers

Go-to-market motion3 records

Distribution channels4 records

Marketing channels6 records

Core offering

Kolb Industriekessel Service GmbH is a full-lifecycle industrial boiler service provider, planning, modernizing, maintaining, and operating steam, hot water, and thermal oil boiler plants for industrial customers across Germany. Its offering spans engineering (with 3D-CAD and 3D laser scanning), AD 2000 HP0-certified in-house welding and pressure vessel manufacturing, the proprietary Kolb Kesselsteuerung (KKS) control system, mobile/containerized boiler plants, and 24/7 emergency service, delivered through four regional branches.

Product overview

Kolb Industriekessel Service GmbH operates as a comprehensive service provider and solution partner for industrial boiler plants, offering a full lifecycle portfolio organized around three core pillars: Planning, Modernization, and Maintenance. The offering is structured as a unified service platform rather than a modular software product. Key named offerings include the proprietary Kolb Kesselsteuerung (KKS) boiler control system, 3D-Scan services for precision planning, and Mobile Kesselanlagen (mobile boiler plants) for rental or purchase. The portfolio spans engineering and consulting, in-house welding and fabrication (AD 2000 HP0 certified), emergency services, operational management, and regulatory compliance (TÜV, 44. BImschV). Complementary services include burner maintenance (Weishaupt/Dreizler), water treatment, fuel supply, control technology upgrades, energy optimization, and alternative energy carrier preparation. The company works in close coordination with sister company Kolb Anlagenbau GmbH for new construction and fabrication.

Differentiator

Problem solved

Functional benefit

Products and services

• Planung (Boiler Plant Planning)
• Modernisierung (Boiler Plant Modernization)
• Wartung (Maintenance Contracts)
• Kolb Kesselsteuerung (KKS) Boiler Control System
• Mobile Kesselanlagen (Mobile Boiler Plants)
• Schweißfachbetrieb (Certified Welding Operations)
• Betriebsführung (Plant Operation Management)

Quantifiable outcome

• Over EUR 50,000 in annual cost savings per customer through modernized boiler plant design (Metzgerei Esser case study)
• +3 more outcomes

Named customers16 records

Segments5 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

Feature4 records

Partnerships

Five partnerships are on record, tiered core and minor.

• KRAFTBLOCKcoreStrategic or Co-development Partner · 5 February 2025Strategic partnership announced February 2025 to combine Kolb's steam boiler plant expertise with KRAFTBLOCK's high-temperature energy storage systems. The partnership aims to enable steam boiler plants to operate without fossil fuels by integrating renewable energy and waste heat recovery. Joint solutions target cost reduction and CO2 emission reduction for industrial customers.
• Rawei WartungsserviceminorImplementation/ SI/ Consulting Partner · 1 January 2024Long-term subcontracting partnership formalized with a 2024 long-term partner agreement. Rawei provides maintenance services, primarily in the Bremen area, supporting Kolb's service delivery network across Germany. Kolb describes Rawei as a 'proven partner company' ('bewährtes Partnerunternehmen').
• Eco Steam and HeatingcoreStrategic or Co-development PartnerKolb partners with Eco Steam and Heating to offer mobile/containerized boiler plants for rental or purchase. Eco Steam and Heating handles manufacturing, transport coordination, and assembly of mobile boiler units, which Kolb then commissions and integrates for customers. Jointly positioned as a space-saving alternative to fixed boiler houses.
• Flametech UGminorImplementation/ SI/ Consulting PartnerPartner company supporting Kolb with technical expertise in the Sassenburg area. Listed as one of Kolb's partner companies working together to provide first-class services nationwide.
• Kolb Anlagenbau GmbHcoreOthersKolb Anlagenbau GmbH is the parent/sister company of Kolb Industriekessel Service GmbH. Together they form the Kolb Group. Kolb Anlagenbau focuses on the planning, manufacturing, and construction of boiler plants, while Kolb Industriekessel Service handles service, maintenance, and modernization. Both companies are jointly presented in recruitment materials and operate from the same website ecosystem. Combined revenue of approximately EUR 15 million and 60+ employees.

Scale indicators8 records

Recent moves10 records

Expansion highlights6 records

Direct peers

• Viessmann: Viessmann is a major German heating and industrial boiler manufacturer and service provider, and was the previous owner of Kolb's predecessor entity (Omnical Industrieservice). Directly comparable as a full-service industrial and commercial boiler solutions company with comparable lifecycle service, modernization, and maintenance offerings.
• Wolf GmbH: Wolf is a German heating and boiler manufacturer serving industrial and commercial customers with condensing boilers, solar thermal, and heat pumps, plus associated service. Comparable as a domestic German competitor in heating plant engineering and lifecycle service for industrial customers.
• Max Weishaupt GmbH: German manufacturer of industrial burners (mono-block and dual-fuel) with a dedicated service and maintenance network. Kolb uses Weishaupt burners in projects and trains technicians on Weishaupt equipment, making it a direct peer in burner service and integration adjacent to boiler plant work.
• Cetetherm: Cetetherm is a Swedish-based specialist in heat transfer solutions and district heating substations with installation and service offerings. Directly comparable as a focused heat-transfer/boiler plant engineering firm serving utility and industrial customers across Northern Europe with similar lifecycle service approach.

Others

• Thermax Limited: Thermax is an India-based industrial boiler and energy solutions group that previously owned the Omnical entity Kolb acquired. Comparable as an industrial boiler manufacturer and EPC provider serving similar steam/hot water/heating applications, though primarily operating in Asian markets.
• KRAFTBLOCK: KRAFTBLOCK is a German high-temperature thermal energy storage company with whom Kolb announced a strategic partnership in February 2025. Adjacent rather than competing—enables Kolb to offer fossil-fuel-free boiler plant solutions, but operates in energy storage rather than boiler services.

Broad incumbents

• ENGIE Deutschland: ENGIE is a major energy services group operating in Germany across district heating, industrial energy efficiency, and facility operations. Overlaps with Kolb in serving municipal utilities (Stadtwerke) and industrial customers on boiler plant modernization and operation, but with much broader energy services portfolio.
• Stork Technical Services (Fluor): Stork, part of Fluor, provides industrial maintenance, modification, and asset integrity services across Europe including boiler and pressure equipment work. Broad incumbent offering industrial maintenance with comparable technical certification requirements but operating across many industries beyond boiler specialization.
• SPIE GmbH: SPIE is a large European multi-technical services provider with German operations spanning energy infrastructure, industrial maintenance, and HVAC/boiler services. Broad incumbent with overlapping capabilities in industrial boiler plant maintenance and modernization but operating at significantly larger scale across multiple technical disciplines.
• Bosch Thermotechnology (Buderus/Loos): Bosch Thermotechnology manufactures industrial boilers (Buderus, Loos, Bosch Industriekessel) and operates a service network across Europe. Kolb explicitly references Bosch as a key supplier and installs Bosch hot water boilers in customer projects, making it a broad incumbent serving overlapping industrial heating markets with much larger scale.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks7 records

Key highlights7 records

Customer concentration

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Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Kolb Industrial Boiler Service