WOWI

What WOWI does

WOWI Haustechnik GmbH is a Berlin-based technical building services (TGA / Haustechnik) contractor founded in 2004 through the acquisition and renaming of Excedo Vermögensverwaltung GmbH, with continuity of all 25 employees from the insolvent Wolfferts & Wittmer. The company delivers integrated multi-trade building engineering across eleven service lines: heating, cooling/refrigeration, ventilation/room air, sanitary, electrical, measurement-control-regulation (MSR), technical gases and compressed air, renewable energy, plant construction (Anlagenbau), planning/engineering, and service/maintenance. Work is executed by in-house installation crews covering both mechanical and electrical scopes, supported by certified welders for technical gases and in-house MSR programming capability, enabling single-source delivery of complex integrated projects.

The company operates a multi-stream revenue model combining project-based new installation work (typical project size EUR 1–5M) with recurring service, maintenance, and 24/7 emergency contracts, plus renovation and modernization revenue that increasingly targets EU GWP refrigerant compliance and energy-efficiency upgrades. Customers are predominantly commercial — real estate developers and investors (Siemens Energy Real Estate, Consus, CA Immo, NIU Potsdam, AXA), industrial operators (Merck KGaA), hospitality (Hotel Mondial), public sector (Bundesrepublik Deutschland), and heritage/non-profit (Lauder Yeshurun Synagogue) — with private homeowners as a secondary segment. Geographic footprint is concentrated in Berlin and surrounding Brandenburg.

Commercially the firm is run as an employee-owned GmbH with 9 managing shareholders and 49 silent partners among approximately 80 staff, a structure introduced in 2008 and described as distinctive within the German building trades. Operations are anchored by a heritage-listed, self-modernized Kesselhaus headquarters in Berlin-Zehlendorf/Steglitz, DNK sustainability certification (2023), and a certification stack covering public procurement (VOB/A), refrigerant handling, and water management (WHG). A sister company, WOWI Luft- und Klimatechnik GmbH, operates from the same building to scale HVAC specialty work.

Name

WOWI

Legal name

WOWI Haustechnik GmbH

Website

https://wowi-haustechnik.de

Company type

Private

Founded year

2004

Operating status

Operating

Headcount range

11–50 employees

Short description

WOWI Haustechnik GmbH is a Berlin-based technical building services contractor delivering integrated multi-trade building engineering — heating, cooling, ventilation, sanitary, electrical, MSR, and renewable energy — to commercial, industrial, and public-sector clients across Berlin and Brandenburg via in-house installation crews and project-based plus recurring service contracts.

Ownership category

akta.pro rank

Product category

Building Technical Services (Haustechnik / TGA)

NAICS

Plumbing, Heating, and Air-Conditioning Contractors (238220)

SIC

Refrigeration & Service Industry Machinery (3580)

akta.pro primary industry

General Commercial Janitorial (Recurring Contract Cleaning) (BPABABAA)

akta.pro secondary industries

HVAC Service, Maintenance & Repair (BPABACAA), Energy Services (Retrofits/Commissioning/Testing & Balancing) (IMAIABAI), Commercial HVAC/R Installation (Rooftop Units, Split Systems) (HSAOAGAH)

Keywords

• Building technical services
• HVAC installation
• Refrigeration technology
• Sanitary engineering
• Electrical contracting

Headquarters

HQ city

Berlin

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. New Installation Projects: Project-based revenue from designing, installing, and commissioning new building systems. Projects range from small residential installations to large commercial construction projects worth 1-5 million euros. Revenue recognized upon project completion.
2. Service, Maintenance and Repair: Ongoing service contracts and reactive maintenance work. Includes 24/7 emergency service for Berlin clients. Provides recurring revenue from established client base including property managers and commercial building owners.
3. Renovation and Modernization: Modernization of existing building systems, often in occupied buildings requiring coordination and phased execution. Projects include energy-efficient upgrades to comply with EU regulations on refrigerants and GWP requirements.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels6 records

Core offering

WOWI Haustechnik GmbH provides integrated technical building equipment (TGA / Haustechnik) services covering planning, project engineering, installation, and ongoing maintenance across all major building trades including heating, cooling/refrigeration, ventilation/air conditioning, sanitary, electrical, measurement-control-regulation (MSR), and technical gases/compressed air systems. The company delivers comprehensive single-source building technology solutions using in-house installation teams for commercial, industrial, residential, and public-sector clients primarily in Berlin and Brandenburg.

Product overview

WOWI Haustechnik GmbH is a building technology services company offering integrated technical building equipment (TGA) services. The portfolio consists of eleven core service areas: Anlagenbau (plant construction), Elektro (electrical), Heizung (heating), Sanitär (sanitary), Raumluft (air conditioning), Kälte (refrigeration), Technische Gase/Druckluft (technical gases/compressed air), MSR (measurement/control technology), Erneuerbare Energien (renewable energies), Planung/Projektierung (planning/engineering), and Service/Kundendienst/Wartung (service/maintenance). The company provides comprehensive solutions from planning through construction to maintenance, with in-house installation teams handling both mechanical and electrical systems. WOWI operates primarily in Berlin, serving industrial, commercial, and residential clients with building technical services.

Differentiator

Problem solved

Functional benefit

Brands

• WOWI-PRO: Mentor program where each apprentice is accompanied by an experienced colleague during their entire training period

Products and services

• Anlagenbau (Plant Construction) Building technology plant construction combining mechanical, electrical and MSR engineering with in-house installation teams, covering end-to-end design, assembly and commissioning for commercial, industrial and residential projects.
• Elektro (Electrical Engineering) Electrical installation services covering power systems, lighting technology, data networks, security and access control systems, fire alarm systems, and electrical switchgear construction for buildings.
• Heizung (Heating Technology) Heating technology services including hot water heating, radiant heating, boiler systems, condensing technology, and underfloor heating installation for residential, commercial and industrial buildings.
• Sanitär (Sanitary Technology) Sanitary installations including water and wastewater treatment, rainwater utilization, hospital and hygiene technology, sanitary fixtures, and barrier-free bathroom conversions.
• Raumluft (HVAC / Air Conditioning) Room air and climate technology including ventilation system construction, smoke exhaust, fire protection, and exhaust air purification for buildings.
• Kälte (Refrigeration Technology) Refrigeration and cooling technology including ice storage systems, split air conditioning units, cooling ceilings and beams, and chilled water systems, with certified specialist expertise in EU F-gas/GWP compliance.
• Technische Gase / Druckluft (Technical Gases / Compressed Air) Technical gases and compressed air systems including pipeline construction and generation systems, executed with qualified certified welders for industrial and laboratory installations.
• Mess-, Steuer- und Regelungstechnik (MSR / Measurement, Control and Regulation) Measurement, control and regulation technology for cross-trade building management, including project planning, switchgear construction, and programming for heating, cooling, ventilation and sanitary systems.
• Erneuerbare Energien (Renewable Energy Systems) Renewable energy solutions including heat pump systems, photovoltaic installations, and e-mobility charging infrastructure for buildings.
• Planung / Projektierung (Planning and Engineering) Engineering and construction planning services using CAD design and calculation programs, providing complete project design and execution from a single source.
• Service / Kundendienst / Wartung (Service, Customer Support and Maintenance) Customer service and maintenance offerings including 24/7 emergency service in Berlin, repairs, preventive maintenance contracts, and system optimization for building technical installations.

Quantifiable outcome

• 81 employees with 37 shareholders
• +2 more outcomes

Named customers9 records

Segments4 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature2 records

Partnerships

Five partnerships are on record, tiered core and minor.

• Ausbildungszentrum Heizung-Klima-Sanitär Berlin und Brandenburg e.V.coreImplementation/ SI/ Consulting PartnerPartnership for vocational training through joint training program (Verbundausbildung). Apprentices receive practical block training at the training center in Haynauer Str. 56a, Berlin Lankwitz, complementing on-the-job training at WOWI.
• ALL-INKL (René Münnich)minorOthersExternal web hosting provider for company website. Server infrastructure located in Friedersdorf, Germany.
• zeitstil design & kommunikation GbRminorStrategic or Co-development PartnerWebsite design and implementation partner responsible for the company's web presence and digital communication.
• WOWI Luft- und Klimatechnik GmbHcoreStrategic or Co-development PartnerSister company located in the same historic boiler house building. Companies work together and held joint events (Frühstück am 31.03.2023). Combined entity provides comprehensive HVAC services.
• Cornelius Matutis (Rechtsanwalt)coreOthersData protection officer (Datenschutzbeauftragter) and internal reporting office (Interne Meldestelle gemäß HinSchG). Located at Berliner Straße 57, 14467 Potsdam.

Scale indicators4 records

Recent moves9 records

Expansion highlights4 records

Broad incumbents

• BAM Deutschland: German operations of Royal BAM Group, providing construction, civil engineering, and building services across commercial and public sectors. Comparable to WOWI in MEP building services, though BAM Deutschland operates as a much larger general contractor with infrastructure-scale capabilities.
• Hochtief: One of Germany's largest construction groups with significant building services and facility management operations. Comparable to WOWI in serving commercial real estate and infrastructure projects, but operates as a general contractor with much broader scope across construction, PPP, and engineering.
• ENGIE Deutschland: German subsidiary of global energy and facility services group ENGIE. Overlaps with WOWI in building services, HVAC, and energy efficiency, but operates at vastly larger scale with broader portfolio including energy generation, district heating, and infrastructure across Germany.

Direct peers

• ROM Facility Solutions: German facility management and technical building services company serving commercial real estate and industrial clients across multiple sites. Comparable to WOWI in offering integrated technical facility services (TGA) to commercial property managers and developers in the German market.
• Gegenbauer Gruppe: Berlin-headquartered integrated facility management and building services group offering MEP, technical building management, and infrastructure services. Directly comparable to WOWI in geographic focus (Berlin) and integrated multi-trade TGA service portfolio serving commercial real estate clients.
• Caverion Deutschland: German operations of Finnish Caverion, providing building solutions and HVAC services across commercial real estate and industrial sectors. Comparable to WOWI in HVAC and refrigeration focus, with similar service contract and project-based model targeting Berlin-area building owners.
• WISAG: Germany's largest family-owned facility services and infrastructure provider with MEP capabilities across aviation, industry, real estate, and energy. Comparable to WOWI in MEP service offering and German-market focus, though operating at significantly larger scale across multiple business segments.
• SPIE GmbH: German subsidiary of French SPIE S.A., offering multi-technical services in mechanical and electrical engineering, HVAC, energy, and communications infrastructure. Directly comparable to WOWI in MEP/TGA service portfolio and German commercial customer focus, though operating at much larger scale with multi-country presence.

Emerging players

• Drees & Sommer: German engineering and consulting firm focused on building services, energy efficiency, and sustainability advisory for real estate and infrastructure. Comparable to WOWI in targeting commercial real estate clients and emphasizing sustainability (DNK-aligned), but focused on consulting and planning rather than installation execution.
• Kaefer Isoliertechnik: German-headquartered industrial services specialist covering insulation, scaffolding, surface protection, and mechanical services across multiple European markets. Comparable to WOWI in industrial building services and heritage/retrofit work, though focused on insulation niche and operates at much larger international scale.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• Instagraminstagram.com/wowi_haustechnik
• LinkedInlinkedin.com/company/wowi-haustechnik

Revenue estimate

Valuation estimate

Number of profiles

Profiles12 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 WOWI