THOR

What THOR does

THOR is a privately held German technical building services (TGA / Technische Gebäudeausrüstung) contractor headquartered in Erfurt and founded in 1998 by Kersten Thor. The company delivers installation and engineering services across four distinct technical disciplines: heating and sanitary engineering, electrical engineering, elevator technology, and refrigeration technology — a multi-trade positioning that allows it to act as a single point of accountability for mechanical, electrical, and vertical-transport scopes on building projects.

Operating with a workforce in the 1,001–5,000 range, THOR functions as a mid-sized specialty contractor whose scale supports concurrent execution across multiple project sites and trade boundaries. The business model is consistent with project-based B2B services: revenue is generated through engineering, installation, and commissioning contracts awarded by developers, property owners, facility managers, and likely public-sector clients in Germany. The source data does not disclose pricing structure, customer mix, geographic footprint beyond the Erfurt HQ, ownership structure, certifications, or financial performance, so deeper economic detail cannot be substantiated.

From a strategic and investment standpoint, THOR's positioning is conventional for the German Mittelstand TGA segment — broad technical-trade capability, established regional presence, and founder-led continuity — but the input set is unusually thin: the corporate website returned only a verification/loader page, and no management bios beyond the founder, no customer logos, no financial disclosures, and no recent strategic actions are documented. Diligence on revenue mix, customer concentration, certifications, and digital/AI capability is required before any investment conclusion.

Name

THOR

Website

https://thormontagen.de

Company type

Private

Founded year

1998

Operating status

Operating

Headcount range

1,001–5,000 employees

Short description

THOR is a privately held Erfurt-based German contractor founded in 1998 that delivers heating and sanitary, electrical, elevator, and refrigeration engineering services to building and facility clients, employing 1,001–5,000 staff.

Ownership category

akta.pro rank

Product category

Building Technical Services (HVAC, Electrical, Elevator, Refrigeration Installation)

NAICS

Plumbing, Heating, and Air-Conditioning Contractors (238220), Building Equipment Contractors (2382)

SIC

Construction - Special Trade Contractors (1700), Refrigeration & Service Industry Machinery (3580)

akta.pro primary industry

HVAC & Refrigeration Contracting (IMAFALAB)

akta.pro secondary industry

Drainage, Waste & Vent (DWV) Systems & Components (IMADALAE)

Keywords

• Heating and sanitary engineering
• Electrical engineering services
• Elevator technology
• Refrigeration technology
• Building technical installations

Headquarters

HQ city

Erfurt

HQ country

Germany

HQ region

Europe

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Supply Chain, Operations, Marketing or Sales, Infrastructure

Core offering

THOR is a multi-disciplinary technical building services contractor that delivers heating & sanitary engineering, electrical engineering, elevator technology, and refrigeration technology installation and engineering services. The company focuses on assembling and installing these building-technical systems for construction and infrastructure projects out of its base in Erfurt, Germany.

Differentiator

Problem solved

Functional benefit

Products and services

• Heating & Sanitary Engineering
• Electrical Engineering Electrical engineering installation services for buildings, delivered as a contracted technical service covering building electrical systems for construction projects.
• Elevator Technology Installation and engineering services for elevator (lift) systems in buildings, delivered as a contracted technical service for construction and building projects.
• Refrigeration Technology Installation and engineering services for refrigeration technology systems, delivered as a contracted technical service for construction and building projects.

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Recent moves1 record

Expansion highlights1 record

Direct peers

• Apleona Group: German-headquartered facility services and building technology provider with strong MEP contracting capabilities. Comparable to THOR as a German building-systems contractor, but broader facility-management scope and larger scale.
• Otis Deutschland: German subsidiary of Otis Worldwide, the global elevator and escalator installation/maintenance leader. Directly comparable to THOR's elevator-technology discipline on technology stack, customer profile (commercial real estate), and maintenance-driven revenue model.
• Caverion Deutschland: Nordic-German building solutions contractor covering HVAC, plumbing, electrical and refrigeration installations and service. Directly comparable to THOR's multi-trade heating/refrigeration/electrical building-equipment offering, serving commercial and industrial clients in Germany.
• Sauter AG: Swiss-German building automation and HVAC service specialist active across DACH. Directly comparable to THOR on HVAC/refrigeration contracting and service, with similar mid-market customer profile.
• ENGIE Deutschland: Large German subsidiary of ENGIE providing multi-trade building services (HVAC, electrical, refrigeration, facility management). Most comparable to THOR on combined mechanical/electrical/building-equipment contracting scope in Germany, only at substantially larger scale.
• KONE Deutschland: German operation of Finnish elevator and escalator major KONE; installs, modernizes and services vertical-transport equipment in Germany. Directly comparable to THOR's elevator-technology line of business, with the same regulatory and service-tail dynamics.
• Schindler Deutschland: German arm of Schindler, one of the world's largest elevator and escalator installation and service companies. Most directly comparable to THOR on the elevator-technology discipline, with similar service/maintenance tail dynamics in Germany.

Broad incumbents

• Stiebel Eltron: German manufacturer of heating, hot water and heat-pump technology, particularly relevant to the heat-pump transition. Comparable to THOR's heating technology exposure but on the manufacturing/equipment side, not contracting.
• Vaillant Group: Germany-headquartered heating, ventilation and heat-pump manufacturer with strong HVAC installer base. Comparable to THOR's heating/discipline at the product level, but sits upstream as an OEM rather than a specialty trade contractor.
• Viessmann Climate Solutions: One of Germany's largest heating-systems manufacturers with deep installer and service networks. Adjacent and partially comparable to THOR's heating/sanitary engineering line, but upstream as a manufacturer rather than a contracting service provider.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights5 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 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 THOR