What Gebr. Lorenzen GmbH & Co. KG does

Gebr. Lorenzen GmbH & Co. KG is a family-owned Technical Building Equipment (Technische Gebäudeausrüstung, TGA) contractor headquartered in Krefeld, Germany, operating continuously since 1876. The company delivers an unusually broad TGA portfolio under one roof, covering Wärmetechnik (heating technology), Kältetechnik (cooling and refrigeration), Sanitärtechnik (sanitary systems), Lüftungstechnik (ventilation), Wärmepumpen (heat pumps), Photovoltaik (PV systems), Gebäudeautomation (building automation using GLT/DDC), and Energiekonzepte (integrated energy concepts). Operations span four locations — Krefeld (headquarters), Bonn (branch), and partner operations in Dresden (B+N Haustechnik GmbH since 1994) and Dinslaken (Karl-Heinz Fleuren GmbH since 2012, in which Lorenzen holds a stake) — supported by 170+ employees and 35 apprentices across the trades Anlagenmechaniker (SHK), Mechatroniker für Kältetechnik, and Technische Systemplaner.

The underlying technology stack is built around building automation (GLT/DDC) and remote energy management software that Lorenzen claims can improve building energy efficiency by up to 30% through integrated heating, climate, and ventilation control. Heat pump offerings include air-water, brine-water (geothermal), and water-water systems, which the company states consume up to 75% less primary energy than conventional heating. On-site generation is anchored by the company's own 35 kW PV system producing roughly 35,000 kWh annually and saving 24,500 kg of CO₂ per year, demonstrating a documented proof point for customers evaluating decarbonization projects.

Lorenzen generates revenue primarily through project-based installation and construction services across residential, commercial, and industrial customers, supplemented by recurring maintenance contracts and an emergency Notdienst service. Project developers, general contractors, and property companies are served through direct field sales with project planning and Beratung (consultation), while private and small business customers reach the company via an online Heizungs- und PV-Rechner that delivers a personalized quote in approximately three minutes, feeding leads to a dedicated Kundendienst (customer service) team. Pricing is not publicly disclosed and is provided per project, with a customer mix spanning enterprise logos such as INTERBODEN (The Cradle), KönigsPalast, Absatzzentrale Kempen, LVM Reha-Klinik Dortmund, Rondo Food, Lemken Alpen, Alberdingk Boley, and Volksbank, alongside a long-tail private customer base concentrated in the Lower Rhine region.

Name

Gebr. Lorenzen GmbH & Co. KG

Legal name

Gebr. Lorenzen GmbH & Co. KG

Website

https://lorenzen.gl

Company type

Private

Founded year

1876

Operating status

Operating

Headcount range

101–250 employees

Short description

Gebr. Lorenzen GmbH & Co. KG is a family-owned German Technical Building Equipment (TGA) contractor founded in 1876, delivering heating, cooling, sanitation, ventilation, heat pump, PV, and building automation services across four locations to project developers, public sector clients, and private customers.

Ownership category

akta.pro rank

Product category

Building Technology Services (Technische Gebäudeausrüstung / TGA)

NAICS

Plumbing, Heating, and Air-Conditioning Contractors (23822)

SIC

Refrigeration & Service Industry Machinery (3580)

akta.pro primary industry

HVAC Service, Maintenance & Repair (BPABACAA)

akta.pro secondary industries

Hard Services (MEP/HVAC, Electrical, Plumbing) (BPABAAAA), Commercial HVAC Maintenance Agreements & PM Programs (HSAOAHAJ)

Keywords

• Technical building equipment
• Heating system installation
• Heat pump systems
• Photovoltaic installation
• Building automation services

Headquarters

HQ city

Krefeld

HQ country

Germany

HQ region

Europe

Offices4 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Installation and Construction Services: Design, installation, and construction of building technology systems (heating, cooling, sanitation, ventilation) for residential, commercial, and industrial projects. Revenue is project-based and one-time per installation.
2. Maintenance and Repair Services: Ongoing maintenance, servicing, and emergency repair (Notdienst) for installed systems. Generates recurring service revenue from existing customer base.
3. Modernization and Replacement: Heating system replacement, PV installation, and building modernization projects. Triggered by customer demand or regulatory changes; project-based revenue.
4. Leak Detection and Pipe Break Service: Emergency Rohrbruchservice (pipe burst service) and leak detection for customers experiencing acute building system failures.

Go-to-market motion2 records

Distribution channels3 records

Marketing channels5 records

Core offering

Gebr. Lorenzen GmbH & Co. KG provides full-spectrum Technische Gebäudeausrüstung (TGA) services across heating, cooling, refrigeration, sanitation, ventilation, heat pumps, photovoltaics, building automation, and integrated energy concepts. The company designs, installs, services, and maintains these systems for residential, commercial, industrial, and public sector buildings. Complementary offerings include 24/7 emergency repair service (Notdienst) and self-service online calculators that generate quotes for heating replacement and PV installation in approximately three minutes.

Product overview

Gebr. Lorenzen GmbH & Co. KG is a building technology company (Technische Gebäudeausrüstung, TGA) founded in 1876. The company offers an integrated portfolio of building technology services: Wärmetechnik (heating technology), Kältetechnik (cooling/refrigeration), Sanitärtechnik (sanitary systems), Lüftungstechnik (ventilation), Wärmepumpen (heat pumps), Photovoltaik (solar PV), Gebäudeautomation (building automation), and Energiekonzepte (energy concepts). These services are delivered as a unified offering under one roof, combining heating, cooling, sanitation, ventilation, renewable energy, and smart building management. The company also provides customer service (Kundendienst), maintenance, emergency services (Notdienst), and online calculators for heating and PV quotes. With approximately 170 employees across four locations in Krefeld, Bonn, Dinslaken, and Dresden, Lorenzen serves private customers, general contractors, public institutions, and architectural firms.

Differentiator

Problem solved

Functional benefit

Brands

• ENERGIE-WISSEN: E-Magazine on sustainability, climate protection, and resource conservation published by Lorenzen for customer education.

Products and services

• Wärmetechnik (Heating Technology)

Quantifiable outcome

• Building energy efficiency improvements of up to 30% through intelligent building automation (GLT/DDC)
• +3 more outcomes

Named customers12 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

Feature4 records

Partnerships

Six partnerships are on record, tiered minor and core.

• Krefelder KlimapaktminorOthers · 1 January 2023Local initiative supporting Krefeld companies in implementing corporate climate protection measures toward climate neutrality. Lorenzen has been a partner since 2023. Participation includes workshops, site visits, and experience exchanges with ~25 other Krefeld companies.
• Kälte-Klimaanlagen Karl-Heinz Fleuren GmbHminorChannel Partner/ Reseller/ Distributor · 1 January 2012Lorenzen holds a stake in this Dinslaken-based partner company specializing in refrigeration and air conditioning. Fleuren operates under the Lorenzen umbrella, providing specialized cooling technology services to Lorenzen customers. Operating under Lorenzen management.
• B+N Haustechnik GmbHminorChannel Partner/ Reseller/ Distributor · 1 January 1994Partnerbetrieb (partner operation) since 1994. B+N Haustechnik GmbH in Dresden operates under the Lorenzen brand and extends the company's geographic reach to eastern Germany (Saxony region). Operating hours: Mo–Th 07:30–17:00, Fr 07:30–14:00.
• "GOLTHERM" Gas- und Ölfeuerungen GmbHcoreOthersThe personally liable general partner (Persönlich haftender Gesellschafter) of Gebr. Lorenzen GmbH & Co. KG, registered in Krefeld (HRB 370). Its managing directors Thomas Lorfing and Katharina Schütze also serve as managing directors of the main operating company. This is the legal entity structure of the group.
• PRIMAKLIMA e.V.minorOthersNon-profit association supported by Lorenzen since 2010 through regular donations. PRIMAKLIMA plants trees to compensate CO₂ emissions. Lorenzen's support enables the planting of enough trees to fully offset the company's operational emissions. DZI-certified charity.
• OroVerde (Tropenwaldstiftung)minorOthersTropical rainforest foundation supported by Lorenzen since 2018. Combines rainforest conservation with development aid in Asia, Central, and South America. Promotes reforestation, protected areas, and sustainable income sources for local communities. DZI-certified since 2015.

Scale indicators8 records

Recent moves9 records

Expansion highlights5 records

Broad incumbents

• ENGIE Deutschland: ENGIE Deutschland is the German subsidiary of global energy and facility-services group ENGIE S.A., offering HVAC, energy-management, and building-automation solutions across commercial and industrial customers. It overlaps with Lorenzen's service portfolio as a broad incumbent, though it also operates in energy supply and large-scale infrastructure projects beyond Lorenzen's scope.
• VINCI Energies Deutschland: VINCI Energies Deutschland provides electrical, HVAC, automation, and energy-efficiency services for buildings and infrastructure as part of global VINCI Group. It is comparable to Lorenzen in MEP/HVAC and building-automation capabilities, but operates at much larger scale and with broader infrastructure exposure.

Direct peers

• R+S Group: R+S Group is a German facility-services company offering technical building management, HVAC, electrical, and energy services for commercial real estate. It is directly comparable to Lorenzen as a multi-trade technical building-services provider, particularly relevant for full-spectrum TGA delivery and recurring service contracts.
• Gegenbauer Services GmbH: Gegenbauer is a major German building and facility-services company offering technical building management, HVAC, and energy services to commercial real estate. It is comparable to Lorenzen as a full-spectrum technical building-services provider, with overlapping capabilities across heating, cooling, and building automation.
• Kraftanlagen München: Kraftanlagen München is a German mechanical, electrical, and HVAC services provider for industrial and commercial customers, with strong energy-infrastructure focus. It is comparable to Lorenzen in MEP/HVAC service delivery and enterprise customer orientation, with overlap in building automation and energy concepts.
• SPIE GmbH: SPIE is a leading German multi-technical service provider for buildings and infrastructure, covering HVAC, electrical, automation, and energy-efficiency services. It directly competes with Lorenzen in the German commercial and enterprise building-services market, though at much larger scale and with a publicly listed parent (SPIE S.A.).
• WISAG: WISAG is one of Germany's largest facility-services and building-technology contractors, providing HVAC, refrigeration, electrical, and building-automation services to commercial and industrial customers. It is directly comparable to Lorenzen in scope of TGA offerings and customer segments, though at substantially larger scale and national reach.

Emerging players

• Thermondo: Thermondo is a digitally-led German heat-pump and home-energy installation startup. It overlaps with Lorenzen's heat pump and PV offerings but focuses exclusively on the residential/SMB segment with a pure-direct-to-consumer, asset-light model — representing both a competitor for SMB heat-pump jobs and a complementary channel for Lorenzen's enterprise projects.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/lorenzen.gl
• LinkedInlinkedin.com/company/27111817
• Instagraminstagram.com/lorenzen.gebaeudetechnik
• TikToktiktok.com/@lorenzen.gebaeudetechnik?lang=de-DE

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 records

Subsidiaries2 records

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 Gebr. Lorenzen GmbH & Co. KG