ek Building and Energy Technology

What ek Building and Energy Technology does

ek Building and Energy Technology (ek Gebäude- und Energietechnik GmbH) is a privately held German building services company founded in 1998 and headquartered in Dieburg, Hesse. The company installs, maintains, and renovates heating, ventilation, air conditioning, and sanitary systems for residential and commercial properties across the greater Darmstadt/Frankfurt region, including Dieburg, Darmstadt, Frankfurt am Main, Langen, Groß-Zimmern, Münster, and Roßdorf. Its service portfolio spans four core lines: new-construction HVAC installation (Neubauten), bathroom construction and planning (Bäderbau), renovation and modernization (Sanierungen), and customer service with seasonal on-call emergency repair (Kundendienst). The firm has expanded into renewable energy integration including solar thermal collectors, heat pumps, and pellet heating, supported by advisory on government subsidies (staatliche Förderung).

The company operates as a regional trades contractor rather than a technology platform. Service delivery is executed by an in-house team of master craftsmen, technicians, and apprentices (Anlagenmechaniker SHK, Meister, Techniker) using equipment and components supplied through established OEM partnerships with premium brands — Viessmann, Wolf, and Geberit designated as core partners, alongside Junkers, Kermi, Duravit, Hansgrohe, Villeroy & Boch, Zehnder, Vallox, and Toshiba. The business runs a sales-led, project-based go-to-market with quote-based pricing; revenue is generated from one-time installation projects for new builds and renovations, plus recurring maintenance and repair contracts for installed systems. Customer acquisition relies on regional reputation, word-of-mouth referrals, community sports sponsorship, and direct contact via phone, email, and on-site consultation.

Ownership is concentrated with founder/Managing Director Markus Kraffczyk as the sole disclosed Geschäftsführer; there is no parent company, no institutional investment, and no disclosed equity backers. Headcount is reported in the 11–50 range, and the company is actively hiring across skilled trades, signaling incremental capacity expansion. The firm's competitive position rests on 25+ years of regional presence, integrated HVAC-plus-renewable capability, and dense local service coverage rather than proprietary technology.

Name

ek Building and Energy Technology

Legal name

ek Gebäude- und Energietechnik GmbH

Website

https://ek-gebaeudetechnik.de

Company type

Private

Founded year

1998

Operating status

Operating

Headcount range

11–50 employees

Short description

ek Building and Energy Technology is a privately held German HVAC and sanitary services contractor founded in 1998, serving residential and commercial customers in Hesse (Dieburg, Darmstadt, Frankfurt region) with installation, renovation, bathroom, and maintenance services.

Ownership category

akta.pro rank

Product category

Building Services & HVAC Contracting

NAICS

Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing (333415), Heating Equipment (except Warm Air Furnaces) Manufacturing (333414)

SIC

Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (3585)

akta.pro primary industry

Residential HVAC System Installation (Furnace/AC/Heat Pump) (HSAOAGAA)

akta.pro secondary industries

Ventilation System Installation (Exhaust Fans, ERV/HRV, Make-Up Air) (HSAOAGAI), Energy Services (Retrofits/Commissioning/Testing & Balancing) (IMAIABAI)

Keywords

• HVAC installation services
• Sanitary and plumbing services
• Bathroom construction
• Heating systems installation
• Renewable energy systems

Headquarters

HQ city

Dieburg

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

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

Revenue model

1. Installation Services: New construction installation of heating, ventilation, sanitary, and air conditioning systems in residential and commercial buildings. One-time project-based revenue from new builds.
2. Maintenance and Repair Services: Ongoing customer service, maintenance, and repair services for existing HVAC systems. Includes emergency on-call service during heating season.
3. Bathroom Construction and Renovation: Custom bathroom planning and renovation services including design and installation of sanitary fixtures.
4. Renovation and Modernization: Retrofit and modernization of existing buildings including low-profile floor heating, heating system replacements, and building renovations.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

ek Building and Energy Technology provides heating, ventilation, sanitary, air conditioning, and bathroom construction and renovation services for residential and commercial buildings in the Hesse region of Germany. The company executes new construction, existing-building renovation, and bathroom build-out projects, plus ongoing customer service and emergency maintenance for installed systems. Delivery covers conventional heating (pellet, gas, oil, geothermal) and renewable energy systems (solar, heat pumps, biomass).

Product overview

ek Building and Energy Technology (ek Gebäude- und Energietechnik GmbH) is a building services company offering a comprehensive portfolio of installation, renovation, and maintenance services for residential and commercial properties. Founded in 1998 and based in Dieburg, Germany, the company specializes in four core service areas: Neubauten (new construction installations), Bäderbau (bathroom construction and planning), Sanierungen (renovations), and Kundendienst (customer service and maintenance). Their technical services encompass heating systems (gas, oil, solar thermal, heat pumps, pellets), ventilation and air conditioning, plumbing and sanitation, as well as renewable energy solutions. The company works with branded equipment from manufacturer partners including Viessmann, Junkers, Kermi, Wolf, and others for heating; Duravit, Geberit, Hansgrohe, and Villeroy & Boch for sanitary installations; and Wolf, Zehnder, Vallox, and Toshiba for ventilation systems.

Differentiator

Problem solved

Functional benefit

Products and services

• New Construction (Neubauten) Planning and installation of heating, sanitary, ventilation, air conditioning, and bathroom systems for new residential and commercial buildings. Reference project documented is a single-family home in Eichenhain, Wetter.
• Bathroom Construction & Renovation (Bäderbau) End-to-end bathroom design, construction, and renovation for residential and commercial customers, covering new installations, modernizations, and refurbishments of existing bathrooms.
• Renovation (Sanierungen) Renovation and modernization of heating, sanitary, ventilation, air conditioning, and bathroom systems in existing buildings. Reference projects include senior residences (Senior Residenz Am Schlosspark Bad Endbach), retail (Rewe Markt), and manufacturing facilities (Salco GmbH).
• Customer Service & Maintenance (Kundendienst) Ongoing maintenance, inspection, and emergency repair service for installed heating, sanitary, ventilation, and climate systems, including an emergency on-call service (Notdienst) for existing customers.
• Renewable Energy Systems (Regenerative Energien) Design and installation of renewable energy systems including solar thermal, heat pumps, and biomass heating, integrated with conventional HVAC and sanitary scope for residential and commercial buildings.

Named customers8 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

16 partnerships are on record, tiered minor and core.

• JunkersminorOthersProduct partner for heat generators and heating surfaces. Supplier of heating equipment integrated into installation projects.
• KermiminorOthersProduct partner for heat generators and heating surfaces. Supplier of radiator and heating surface solutions.
• NovelanminorOthersProduct partner for heat generators and heating surfaces. Supplier of heat pump technology.
• ViessmanncoreOthersProduct partner for heat generators and heating surfaces. Major supplier of heating technology including boilers and heat pumps.
• WeishauptminorOthersProduct partner for heat generators and heating surfaces. Supplier of burners and heating systems.
• DuravitminorOthersProduct partner for sanitary and bathroom equipment. Supplier of bathroom ceramics and fixtures.
• GeberitcoreOthersProduct partner for sanitary and bathroom equipment. Supplier of bathroom installations and sanitary systems.
• HansgroheminorOthersProduct partner for sanitary and bathroom equipment. Supplier of faucets and shower systems.
• KermagminorOthersProduct partner for sanitary and bathroom equipment.
• LaufenminorOthersProduct partner for sanitary and bathroom equipment. Supplier of bathroom ceramics.
• SprinzminorOthersProduct partner for sanitary and bathroom equipment. Supplier of shower enclosures and glass solutions.
• Villeroy & BochminorOthersProduct partner for sanitary and bathroom equipment. Supplier of premium bathroom ceramics and wellness products.
• ToshibaminorOthersProduct partner for ventilation and air conditioning. Supplier of air conditioning systems.
• ValloxminorOthersProduct partner for ventilation and air conditioning. Supplier of ventilation systems.
• WolfcoreOthersProduct partner for ventilation and air conditioning. Supplier of complete HVAC systems including ventilation and air conditioning.
• ZehnderminorOthersProduct partner for ventilation and air conditioning. Supplier of ventilation and indoor air quality solutions.

Scale indicators2 records

Recent moves5 records

Expansion highlights4 records

Broad incumbents

• Gegenbauer Group: Large German facility services group with HVAC, building services, and technical facility management offerings. Comparable end-to-end service capabilities but at significantly larger scale and broader geographic reach.
• Vaillant Group: German heating manufacturer with a strong installer and service-partner network in heat pumps and gas heating. Competes for the same end customers and shapes installation standards/specification choices ek must follow.
• Stiebel Eltron: German heating and heat-pump manufacturer with a national installer/service-partner network. Operates in the same end-customer category as ek and is a key heat-pump supplier influencing spec decisions.
• Dussmann Service: Large German facility and building services company with technical trades including HVAC and energy. Comparable service categories at substantially larger scale, often serving enterprise and institutional customers.
• Buderus (Bosch Thermotechnology): Major German heating-systems brand (part of Bosch) with deep installer relationships across gas, oil, and heat-pump segments. Comparable end-market positioning and shapes the equipment-selection landscape for ek's customers.
• WISAG Industrie Service: Major German technical facility services provider with significant HVAC, building services, and energy-services capabilities. Comparable in core trades but operates nationally and serves larger enterprise contracts.

Direct peers

• GA-tec Gebäude- und Anlagentechnik GmbH: German full-service building services contractor offering heating, ventilation, sanitary, and air-conditioning installation across multiple regions. Closest like-for-like peer in business model, service mix, and target customer segments.

Others

• Viessmann: Major German heating and heat-pump manufacturer and an existing core equipment partner to ek. Not a direct competitor but the dominant specifier of installation standards and pricing benchmarks in the segment.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks7 records

Key highlights7 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 ek Building and Energy Technology