Haustech GmbH

What Haustech GmbH does

Haustech Service und Anlagenbau GmbH is an owner-managed German Mittelstand SME specializing in room air and climate technology (Raumluft- und Klimatechnik), headquartered in Langenhagen near Hannover and operating since 1995. The company provides end-to-end HVAC services to enterprise, public-sector, and industrial clients — covering Anlagenbau (plant construction of ventilation, cooling, and complex climate systems), Wartung/Service (maintenance of 200+ properties with 24/7 emergency response), Kleinkälte (small-scale refrigeration added in 2020), Hygiene VDI 6022 inspection and certification, Vorbeugender Brandschutz (preventive fire protection including smoke extraction and renovation of legacy asbestos-containing systems), and ancillary trades (technical insulation, heating/sanitary, electrical, core drilling, large-scale refrigeration).

Technically, Haustech executes complex, multi-disciplinary installations evidenced by reference projects including the TÜV Nord Rechenzentrum Hannover (3 chillers at 585 kW, 3 hybrid coolers at 700 kW, 22 cold-water climate cabinets, 620 m of X-ray-welded piping), the Passerelle / Niki-de-Saint-Phalle-Promenade (7 AHUs, >225,000 m³/h supply and extract air, 12 UV-C exhaust purification units for gastronomy, 70+ fire dampers, 170+ zone reheaters/coolers, high-pressure ducts coated with anti-vibration mass over a ~650 m underground passage), and the Spielbank Hannover (20 AHUs, >200,000 m³/h smoke-extraction capacity, 2 MW cooling serving casino, cinemas, shops, and nightclubs). The company is pre-qualified under Nr. 101.000371 for Raumlufttechnische Anlagen and holds Handwerksrolleneintragung plus Ordnungsamt permits for Kleinkälte.

Commercially, Haustech runs a B2B direct-sales motion targeting institutional and industrial buyers in Lower Saxony and Hamburg. Revenue is generated through project-based plant construction (15–30-month contracts, multi-million Euro ticket sizes) and recurring maintenance contracts (subscription-style, individualized pricing). The customer base includes Sparkasse Hannover, Medizinische Hochschule Hannover, Flughafen Langenhagen, Sennheiser, HDI Versicherung, Spielbank Hannover, TÜV Nord, ING-DiBa, Staatstheater Hannover, and three Staatliche Baumanagements. The firm is privately held by representatives Ralf Kleine-Vorholt, Stephan Kleine-Vorholt, and Frank Kiesewetter with no disclosed external investment or parent company.

Name

Haustech GmbH

Legal name

Haustech Service und Anlagenbau GmbH

Website

https://haustech-klima.de

Company type

Private

Founded year

1995

Operating status

Operating

Headcount range

1–10 employees

Short description

Haustech Service und Anlagenbau GmbH is a German HVAC specialist founded in 1995 in Langenhagen near Hannover. The owner-managed SME designs, installs, and maintains ventilation, cooling, fire protection, and VDI 6022 hygiene systems for enterprises, public-sector institutions, and industrial clients across Lower Saxony and Hamburg.

Ownership category

akta.pro rank

Product category

HVAC and Climate Technology Services

NAICS

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

SIC

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

akta.pro primary industry

HVAC Installation, Service & Repair (IMAIABAA)

akta.pro secondary industries

HVAC & Refrigeration Contracting (IMAFALAB), HVAC Service, Maintenance & Repair (BPABACAA), Chillers, Boilers & Central Plant Operations (BPABACAG)

Keywords

• HVAC installation services
• Ventilation system construction
• Building climate technology
• Industrial cooling systems
• Preventive fire protection

Headquarters

HQ city

Langenhagen

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Plant Construction (Anlagenbau): Project-based revenue from designing, installing, and commissioning HVAC systems for new construction and renovation projects. Projects range from 15-30 months with significant contract values including complex systems with ventilation, cooling, and fire protection components.
2. Maintenance and Service Contracts: Ongoing maintenance services for installed HVAC systems. The company maintains over 200 maintenance properties (Wartungsobjekte), providing recurring revenue from both company-installed systems and third-party equipment. Includes 24/7 emergency response and VDI 6022 hygiene compliance services.
3. Small Cooling (Kleinkälte): Small-scale refrigeration and cooling system services added in 2020, extending service offerings to include own personnel for cooling equipment maintenance.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels2 records

Core offering

Haustech Service und Anlagenbau GmbH designs, installs, commissions, and maintains room air and climate technology (HVAC) systems for industrial facilities, government buildings, data centers, commercial properties, and entertainment venues. The company delivers project-based plant construction (Anlagenbau), recurring maintenance and service across more than 200 managed properties, small-scale refrigeration (Kleinkälte), VDI 6022 hygiene inspection, and preventive fire protection including smoke extraction systems and renovation of legacy systems containing asbestos.

Product overview

Haustech Service und Anlagenbau GmbH is an owner-managed, medium-sized company in room air and climate technology offering a unified portfolio of six integrated service modules. The core offerings comprise Anlagenbau (system construction for complex HVAC installations), Wartung/Service (maintenance and service for 200+ objects), and Kleinkälte (small-scale refrigeration added in 2020). These are complemented by specialized services including Hygiene VDI 6022 (hygiene compliance certification), Vorbeugender Brandschutz (fire protection and smoke extraction systems), and Sonstige Leistungen (ancillary services including insulation, electrical work, and large-scale refrigeration). The services are designed to support customers from planning through construction to ongoing maintenance.

Differentiator

Problem solved

Functional benefit

Products and services

• Anlagenbau (System Construction) Project-based design, installation, and commissioning of HVAC systems for new construction and renovation projects, covering ventilation, cooling, refrigeration, and integrated fire protection for industrial, commercial, public-sector, and entertainment buildings.
• Wartung / Service (Maintenance and Service)

Named customers10 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Two partnerships are on record, tiered minor.

• Partner Companies for Small CoolingminorOthers · 1 September 2020Partner companies used for small-scale refrigeration (Kleinkälte) services. Haustech coordinates these partners to provide faster on-site response for customer equipment malfunctions. After receiving necessary permits in September 2020, Haustech now provides small cooling services with own personnel.
• IT-Nunweiler GmbHminorOthersIT service provider responsible for web design and marketing services for Haustech. Located in Hannover, they provide managed IT services.

Scale indicators3 records

Recent moves5 records

Expansion highlights4 records

Broad incumbents

• Gegenbauer Holding GmbH & Co. KG: Major German facility services provider with full HVAC, refrigeration, and technical building services portfolio across multiple regions; competes with Haustech on commercial and public-sector HVAC tenders from a national footprint.
• Wisag Industrie-Service Holding GmbH & Co. KG: One of Germany's largest facility services groups, offering HVAC, refrigeration, technical building services, and industrial maintenance nationwide. Competes with Haustech for the same enterprise and public-sector clients across a much broader geography.
• ENGIE Services GmbH (Germany): German arm of global energy and facility services group ENGIE; provides HVAC installation, maintenance, and energy services across multiple regions — directly overlaps Haustech's HVAC contracting scope but at vastly larger national scale with broader service portfolio.

Direct peers

• Caverion Deutschland GmbH: German subsidiary of Nordic technical building services group Caverion; provides HVAC installation, service, and maintenance for commercial, industrial, and public-sector clients — same core business model and customer types as Haustech, though at broader geographic scale.
• Heinrich Schmid GmbH & Co. KG: German technical facility services group with HVAC, refrigeration, building services, and maintenance offerings; operates across multiple regions but with similar mid-sized, project-based business model overlapping Haustech's customer base.
• SAUTER Deutschland GmbH: Building automation and HVAC services provider in Germany offering Raumluft- und Klimatechnik installation, MSR engineering, and ongoing maintenance — closely mirrors Haustech's integrated HVAC + automation + maintenance model.
• ROM A Klimatechnik GmbH: Mid-sized German HVAC and refrigeration specialist focused on commercial and industrial climate systems; comparable scale to Haustech with similar project-based contracting and service offerings.

Others

• DAIKIN Airconditioning Germany GmbH: German arm of global HVAC manufacturer Daikin; supplies commercial and industrial refrigeration/AC equipment and competes indirectly via installer/partner programs that overlap with the contractors Haustech competes against.
• Viessmann Climate Solutions SE: Leading German manufacturer of heating, industrial refrigeration, and climate systems; competes indirectly with Haustech through installer networks and supplies much of the equipment Haustech integrates into its HVAC projects.
• Stiebel Eltron Deutschland GmbH: Major German HVAC and heat pump equipment manufacturer; not a direct service competitor but a key enabling supplier of heating, cooling, and ventilation equipment that Haustech installs and services in its projects.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/haustech-gmbh

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 Haustech GmbH