dörr

What dörr does

Dörr GmbH Saalfeld is a privately held German multi-trade building services contractor founded in 1993 in Rudolstadt and now headquartered in Saalfeld, Thuringia. The company installs and maintains heating, sanitation (plumbing), ventilation, climate control, and electrical systems for residential and commercial customers, organized into six integrated service divisions — Heizung, Lüftung, Sanitär, Klima, Elektro, and Kundendienst — delivered under an "alles aus einer Hand" (everything from one source) model. Technical capabilities include in-house CAD planning, 3D bathroom visualization, control-and-regulation technology for combination heating systems, PV and battery storage installation, and hygiene/fire-protection services for ventilation under VDI 6022 and DIN 16798.

The company employs approximately 100 direct staff plus up to 30 subcontractors, and reports a 24/7 emergency hotline plus a dedicated ten-technician service team. Customer concentration sits on a long tail of over 3,000 private households in Thuringia alongside an undisclosed number of nationwide enterprise accounts including hotel chains, gas stations, system gastronomy, retail, educational institutions, government facilities, construction companies, and industrial clients. Revenue is generated through one-time installation projects and recurring maintenance/service contracts, with quote-based, project-specific pricing and free initial consultation.

Dörr is owned and led by founder-managing director Gunter Anding since 1996, with authorized signatories Wiebke Giensch and Thomas Pawelleck; there is no parent company, no external investors, no subsidiaries, and no funding rounds. The firm holds DVGW, SCC, TÜV Thüringen, and ChemKlimaschutzV certifications and maintains technology partnerships with Buderus, Viessmann, ETA Heiztechnik, Windhager, and TA (Technische Alternative), supported by regional distribution ties to GC Gruppe, Richter-Frenzel, and local building-materials partners.

Name

dörr

Legal name

Dörr GmbH

Website

https://doerr-saalfeld.de

Company type

Private

Founded year

1993

Operating status

Operating

Short description

Dörr GmbH Saalfeld is a privately held German multi-trade HVAC, plumbing, ventilation, climate, and electrical installation and maintenance contractor serving over 3,000 private customers in Thuringia and nationwide enterprise accounts in hospitality, retail, and industry.

Ownership category

akta.pro rank

Product category

HVAC and Building Technical Services

NAICS

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

akta.pro primary industry

HVAC & Refrigeration Contracting (IMAFALAB)

akta.pro secondary industries

HVAC Installation, Service & Repair (IMAIABAA), New Construction HVAC Rough-In & Final Set (Residential/Light Commercial) (HSAOAGAL)

Keywords

• HVAC installation services
• Building technical systems
• Heating and plumbing
• Ventilation and climate
• Electrical installations

Headquarters

HQ city

Saalfeld

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

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

Revenue model

1. Installation Services: One-time installation of heating, ventilation, air conditioning, plumbing, and electrical systems for residential and commercial customers
2. Maintenance and Service Contracts: Regular maintenance services including annual inspections of heating systems, with dedicated service technicians available 24/7
3. Emergency Repair Services: 24-hour emergency repair service with rapid response capability for urgent issues
4. Ventilation System Services: Planning, construction, and maintenance of ventilation systems for commercial and residential applications
5. Electrical and Photovoltaic Installation: Planning and installation of electrical systems including PV installations and battery storage

Go-to-market motion2 records

Distribution channels4 records

Marketing channels6 records

Core offering

Dörr GmbH installs, plans, and maintains heating, ventilation, plumbing, climate control, and electrical systems for residential and commercial customers. The company delivers these services as an integrated one-stop solution, providing consultation, in-house CAD planning, installation, and ongoing maintenance including a 24-hour emergency repair service. Its portfolio covers new installations, retrofits, energy-efficient upgrades (including photovoltaic and battery storage), and recurring maintenance contracts across Germany.

Product overview

Dörr GmbH is a multi-trade craft services company offering integrated installation, maintenance, and repair services for residential and commercial customers. The core portfolio consists of six interconnected service divisions: Heating (Heizung), Ventilation (Lüftung), Plumbing (Sanitär), Climate Control (Klima), Electrical Systems (Elektro), and Customer Service/Maintenance (Kundendienst). These services are delivered as a unified offering — 'alles aus einer Hand' (everything from one source) — enabling the company to handle new installations, retrofits, and ongoing maintenance across all building technical systems from a single provider. The company serves both private customers (over 3,000 in Thuringia) and business customers nationwide, including hotel chains, gas stations, restaurants, educational institutions, retail chains, government facilities, and industrial clients.

Differentiator

Problem solved

Functional benefit

Products and services

• Heizung (Heating Systems) Installation, replacement, and optimization of heating systems for residential and commercial customers, including gas and oil condensing heaters, heat pumps (air-water, air-air, direct evaporators), wood gasification boilers, pellet systems, wood chip systems, and thermal solar systems.
• Lüftung (Ventilation Systems) Professional ventilation solutions for private and commercial spaces, including CAD-based planning, hygiene inspections per VDI 6022, fire protection upgrades for ventilation systems, and maintenance services per DIN 16798 standards.
• Sanitär (Plumbing Systems) Complete house plumbing installations with necessary pipes, fittings, and hot water preparation, as well as bathroom renovations, including innovative 3D planning for sanitation projects.
• Klima (Climate Control) Climate solutions ranging from private air conditioning units to commercial spaces such as gas stations and pharmacies, including maintenance, cleaning, and refrigeration circuit repairs.
• Elektro (Electrical Systems) Planning, construction, and modernization of electrical systems for energy supply and building technology, including photovoltaic (PV) systems and battery storage systems, with registration services for energy suppliers and market data registers.
• Kundendienst (Customer Service & Maintenance) 24-hour on-call service with 10 trained electro, control, and maintenance technicians; maintenance for gas, oil, wood, pellet, and wood chip systems, district heating, large boiler systems, heat pumps, water treatment, climate, chilled water, and ventilation systems.

Quantifiable outcome

• 3000+ annual maintenance services performed on heating systems
• +2 more outcomes

Named customers8 records

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Ten partnerships are on record, tiered major, core and minor.

• BuderusmajorTechnology or IntegrationProduct and technology partner for heating systems. Buderus is a leading manufacturer of heating technology including boilers and heat pumps.
• ViessmannmajorTechnology or IntegrationTechnology partner for heating and climate solutions. Viessmann is a major European manufacturer of heating systems.
• ETA HeiztechnikcoreTechnology or IntegrationAustrian heating technology manufacturer specializing in wood gasification and heat pump systems.
• WindhagercoreTechnology or IntegrationAustrian manufacturer of heating systems including heat pumps and hybrid systems.
• Kirschbaum GebäudetechnikminorChannel Partner/ Reseller/ DistributorRegional building technology partner for project collaboration.
• TA (Technische Alternative)coreTechnology or IntegrationAustrian manufacturer of control systems and smart home solutions for building technology.
• Richter-FrenzelminorChannel Partner/ Reseller/ DistributorWholesale distributor for sanitary products and installation materials.
• GC Gruppe (Menningen KG)minorChannel Partner/ Reseller/ DistributorLarge trade distributor for sanitary, heating, and air conditioning products.
• RSB RudolstadtminorChannel Partner/ Reseller/ DistributorRegional trade partner for building products.
• Jahn BBminorChannel Partner/ Reseller/ DistributorRegional building materials and installation supplies partner.

Scale indicators7 records

Recent moves14 records

Expansion highlights5 records

Direct peers

• GA-tec Gebäude- und Anlagentechnik GmbH: German MEP contractor offering heating, ventilation, plumbing, electrical, and refrigeration services nationwide — the closest direct functional peer to Dörr in scope and customer mix.
• R+S Group Holding GmbH: Frankfurt-based technical building services group covering HVAC, electrical, plumbing, and automation for commercial and industrial clients — comparable multi-trade contracting model across Germany.
• Gegenbauer Holding GmbH & Co. KG: Berlin-headquartered provider of building, facility, and technical services including HVAC and energy systems — comparable German MEP services firm serving commercial and institutional customers.

Broad incumbents

• ENGIE Deutschland GmbH: Large German arm of the French utility/energy services group providing facility management, HVAC, and energy-efficiency services — broader portfolio and significantly larger scale than Dörr, but overlapping in commercial HVAC service.
• Caverion Deutschland GmbH: German subsidiary of the Nordic MEP services group Caverion, delivering building technology, HVAC, and industrial services — same commercial customer profile but at national/EU scale.
• WISAG Industrie Service Holding GmbH & Co. KG: Major German facility-management and technical services provider covering HVAC, electrical, and industrial maintenance — overlapping service scope with broader facility-management emphasis.
• Sodexo Facility Services GmbH: Global facility-services company with a German operation covering integrated building services including HVAC maintenance — comparable in commercial customer mix but at much larger scale.

Others

• Stiebel Eltron GmbH & Co. KG: German heat-pump and heating-technology manufacturer and a natural partner/competitor at the equipment layer — comparable to Dörr's OEM partners (Buderus, Viessmann) rather than its service model.
• Buderus (Bosch Thermotechnik GmbH): Major German heating-systems OEM and one of Dörr's strategic core partners — comparable as an industry player in the same value chain rather than a direct contracting competitor.
• Viessmann (Viessmann Climate Solutions SE): Leading European heating and climate-solutions manufacturer and a Dörr strategic technology partner — adjacent in the ecosystem rather than a service competitor.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/doerr.saalfeld
• Instagraminstagram.com/doerrsaalfeld

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 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 dörr