GKK

What GKK does

GKK AG, legally "Gottschalk / Klima / Kältetechnik," is a privately held German stock corporation (Aktiengesellschaft) founded in 1997 by Jan Gottschalk and headquartered in Osterweddingen near Magdeburg, Sachsen-Anhalt. The company operates as a full-service HVAC contractor spanning the full project lifecycle — from project planning and energy consulting through installation and optimization to lifetime maintenance and 24/7 emergency service. Its service portfolio covers refrigeration and air conditioning (Kälte- und Klimatechnik), ventilation and air handling systems (Raumlufttechnische Anlagen), air-to-water heat pumps (Wärmepumpen), and specialized bakery refrigeration (Bäckereikältetechnik), supported by a 1,800+ sqm warehouse facility and an in-house technical team. The company installs equipment from major OEMs including DAIKIN, Hitachi, and Mitsubishi Electric, and has developed proprietary 4th-generation control electronics (Evolution GTA and Tikü) for bakery fermentation and dough conditioning applications under Technical Director Heinz Schwierz.

The company's revenue model combines one-time project-based installation revenue with recurring service and maintenance contract revenue. Customers span commercial/industrial (primary), residential, engineering firms and planners, and a specialized bakery cooperative partnership with BÄKO Weser-Ems. Notable enterprise engagements include a €1.1M Vattenfall district heating plant installation in Berlin-Wilmersdorf, a €170K Universitätsklinikum Magdeburg cleanroom HVAC renovation, and ongoing coverage of approximately 75% of BMW auto dealerships in a region served through Schubert Motors. The firm holds Präqualifizierung (praq) certification enabling public sector tender participation and operates with a supervisory board structure under Aufsichtsrat chair Axel Schaare.

GKK's go-to-market is sales-led through on-site field consultation, free initial consultations, regional sports sponsorship (1. FC Magdeburg, SC Magdeburg), and trade/career event participation. Geographic focus is Sachsen-Anhalt and Mitteldeutschland (Central Germany), with selective project bidding across Germany (Berlin, Potsdam, Wolfenbüttel). The firm has no disclosed external equity investors, no subsidiaries, no M&A activity, and no public funding rounds; a 2022-2023 EFRE (European Regional Development Fund) digitization grant represents the only disclosed external capital inflow.

Name

GKK

Legal name

GKK AG - Gottschalk / Klima / Kältetechnik

Website

https://gkk-gottschalk.de

Company type

Private

Founded year

1997

Operating status

Operating

Headcount range

251–500 employees

Short description

GKK AG is a German full-service HVAC contractor founded in 1997, specializing in refrigeration, air conditioning, ventilation, and heat pump installation and maintenance for commercial, industrial, residential, and bakery customers across Central Germany, with proprietary bakery refrigeration control electronics.

Ownership category

akta.pro rank

Product category

HVAC Contracting Services

NAICS

Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing (33341)

SIC

Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (3585), Refrigeration & Service Industry Machinery (3580)

akta.pro primary industry

HVAC Equipment (Heating, Cooling & Air Handling) (IMAHAKAB)

akta.pro secondary industry

HVAC & Industrial Ventilation (Chillers, AHUs, Exhaust, Filtration) (EUAEAFAE)

Keywords

• HVAC services
• Refrigeration systems
• Air conditioning installation
• Ventilation systems
• Heat pump solutions

Headquarters

HQ city

Osterweddingen

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, Others

Revenue model

1. Installation and New Construction: Installation, construction, or expansion of refrigeration, air conditioning, ventilation, and heat pump systems for commercial and residential customers. One-time project-based revenue.
2. Service, Maintenance and Repairs: 24/7 emergency service, maintenance contracts (including specialized bakery refrigeration contracts), leak testing per EU regulation 517/2014, repairs, disassembly and disposal. Ongoing recurring revenue through maintenance contracts.
3. Project Planning and Consulting: Customer-oriented project planning, energy consulting, sound insulation consulting, and optimization of existing projects. Often bundled with installation.
4. Full-Service Plans: Comprehensive maintenance packages covering all aspects of climate technology upkeep.

Pricing tiers

Go-to-market motion3 records

Distribution channels3 records

Marketing channels6 records

Core offering

GKK AG is a full-service HVAC contractor that plans, installs, optimizes, and provides lifetime maintenance for refrigeration, air conditioning, ventilation, and heat pump systems. The company serves commercial, industrial, institutional, and residential customers across Central Germany (with focus on Sachsen-Anhalt), using premium OEM equipment (DAIKIN, Hitachi, Mitsubishi Electric) and proprietary bakery refrigeration control electronics. Service delivery is anchored by 24/7 emergency response, remote monitoring, recurring maintenance contracts, and on-site field execution from its Osterweddingen headquarters and 1,800+ sqm warehouse.

Product overview

GKK AG operates as a full-service provider for refrigeration, air conditioning, ventilation, and heat pump technologies in Central Germany. Their portfolio centers on five interconnected service areas: Kälte- und Klimatechnik (cooling and AC systems including VRV/VRF), Raumlufttechnische Anlagen (ventilation and air handling with cleanroom capabilities), Wärmepumpen (air-to-water heat pumps like DAIKIN Altherma), Bäckereikältetechnik (specialized bakery refrigeration with proprietary control electronics), and Service & Wartung (24/7 maintenance, remote monitoring, and repairs). For commercial and industrial clients, they additionally provide heating, plumbing, and smoke extraction systems. The company serves commercial customers, private homeowners, engineers, and planners with project planning, installation, optimization, and lifetime maintenance.

Differentiator

Problem solved

Functional benefit

Products and services

• Kälte- und Klimatechnik (Refrigeration and Air Conditioning) Complete cooling and air conditioning solutions including cold water generation for large office complexes, VRV & VRF climate systems, consultation, planning, execution, and maintenance services for commercial and residential customers.
• Raumlufttechnische Anlagen (Ventilation and Air Handling Systems) Ventilation and air handling systems including controlled residential ventilation (KWL), cleanroom technology, smoke extraction, adiabatic humidification, and pharmaceutical process equipment for commercial, industrial, and residential customers.
• Wärmepumpen (Heat Pumps) Air-to-water heat pumps including DAIKIN Altherma LUVITYPE Style systems with 4-16 kW heating capacity, split-design units with outdoor unit and indoor hydrobox, guaranteed operation down to -25°C external temperature, for heating and cooling applications in homes, offices, and commercial buildings.
• Bäckereikältetechnik (Bakery Refrigeration Technology) Specialized bakery refrigeration including proofing automation (Gärvollautomaten), dough cooling and storage rooms, shock freezers, blast freezers, combination cells, and Teiglingskonditionierung sanfte Kälte 'System GKK' gentle cooling, with proprietary GKK control electronics and up to 45% energy savings via inverter technology. For commercial and industrial bakeries, including BÄKO cooperative partners.
• Service & Wartung (Service and Maintenance) 24/7 emergency service, maintenance contracts for refrigeration and climate systems, bakery refrigeration maintenance, full-service plans, remote monitoring (Fernüberwachung), repairs, leak testing per EU regulation 517/2014, and hygiene inspections per VDI 6022.
• Gewerbe- und Industriekältetechnik (Commercial and Industrial Refrigeration) Commercial and industrial refrigeration and ventilation systems with MSR (measurement, control, regulation) technology for public facilities, office complexes, hotels, restaurants, and medical cleanrooms. Includes project planning, installation, optimization, and lifetime maintenance.

Quantifiable outcome

• Up to 45% energy savings with inverter technology in bakery refrigeration systems
• +2 more outcomes

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

Feature4 records

Partnerships

One partnership is on record.

• BÄKO Weser-Ems Bäcker- & Konditoren Genossenschaft eGcoreChannel Partner/ Reseller/ DistributorGKK AG is an official partner of BÄKO Weser-Ems, a baker and confectioner cooperative. This partnership positions GKK as a preferred provider of specialized bakery refrigeration technology including fermentation automatons, dough cooling rooms, and storage facilities for bakery customers within the cooperative network.

Scale indicators4 records

Recent moves7 records

Expansion highlights6 records

Broad incumbents

• Gegenbauer Services: Berlin-based technical building services and facility management provider covering HVAC, refrigeration, and energy services. Comparable as a multi-region German technical building services contractor.
• Vaillant Deutschland: Major German heating and HVAC manufacturer (heat pumps, ventilation, climate) with national service infrastructure. Competes with GKK across heat-pump installation and residential/commercial HVAC service.
• Stiebel Eltron Deutschland: Leading German heat pump and hot-water technology manufacturer with strong installer network. Directly comparable to GKK's air-to-water heat pump offering and energy-efficient residential/commercial heating positioning.
• Bosch Thermotechnik (Buderus): Division of Bosch selling heating, heat pump, and HVAC solutions through a German-wide installer network. Comparable broad incumbent in commercial and residential heating/HVAC where GKK competes.
• ENGIE Deutschland: Large multi-service energy and technical building services provider in Germany with HVAC, refrigeration, and facility services. Competes with GKK for large commercial, industrial, and institutional HVAC contracts including energy-utility projects.
• Dussmann (KDL): Dussmann Group's technical building services division provides HVAC, refrigeration, and energy solutions to commercial and institutional customers across Germany, overlapping GKK's full-service value proposition.
• Viessmann Deutschland: Large German manufacturer and installer of heating, heat pump, and HVAC systems with nationwide service. Comparable as a broad HVAC/heating incumbent that competes with GKK's commercial and residential heat-pump and HVAC installation business.
• Wisag: German facility and building-services provider with HVAC, refrigeration, and technical maintenance offerings. A broader incumbent offering similar full-service HVAC and refrigeration services to commercial/industrial customers.

Others

• Daikin Airconditioning Germany: German arm of Daikin, a primary OEM supplier to GKK for VRV/VRF and heat-pump systems. Comparable as both a partner and an indirect competitor, since Daikin's growing certified installer network can disintermediate regional contractors.
• Mitsubishi Electric Europe (Living Environment Systems): German business of Mitsubishi Electric supplying air-conditioning and heat-pump equipment used by GKK. Comparable as an adjacent OEM whose expanding direct/service channel is both an enabler and a potential competitive threat.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Instagraminstagram.com/gkk_ag

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 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 GKK