Maier Heiztechnik GmbH

What Maier Heiztechnik GmbH does

Maier Heiztechnik GmbH is a family-owned HVAC (heating, ventilation, air conditioning) and sanitary contractor headquartered in Köngen, Germany, operating since approximately 1960 (firmographics cite 1966). The company designs, installs, services, and finances heating, cooling, air conditioning, ventilation, and sanitary systems for private homeowners, housing associations, commercial and industrial customers, and public sector clients across the Stuttgart/Esslingen region of Baden-Württemberg. Core product lines include air-source and ground-source heat pumps, gas condensing boilers (including H2-ready variants), pellet and wood-chip biomass systems, district heating transfer stations, hybrid systems combining heat pumps with gas or biomass, combined heat and power (BHKW/CHP) units, commercial refrigeration and cooling, and sanitary installations. The firm brands itself around an 'everything from a single source' model, delivering all services through its own workforce of approximately 95 employees without subcontractors, and drawing on manufacturer relationships with Viessmann, Bosch/Junkers, Weishaupt, Buderus, Hoval, Daikin, KWB, ÖKOFEN, Remeha, and Remko.

The business model mixes transactional project revenue (installation of systems ranging from 5 kW to 2,000 kW) with several long-duration recurring streams. These include Anlagen-Contracting (15-20 year contracts under which Maier owns, operates, and maintains the system while selling heat at a fixed rate), Heizungs-Miete/financing (10-15 year rental agreements with title transfer at term end), tiered annual maintenance contracts (Basic, Comfort, Premium), and 24/7 emergency service prioritized for contract holders. Pricing is quote-based across installations; emergency call-out fees are published at €142.80 weekday / €190.40 weekend with 25-150% time-based surcharges, and a €250 travel fee applies to non-contract customers. Approximately 2,500 maintenance visits per year indicate a substantial installed base, and over 1,500 reference projects span single-family homes, apartment blocks, schools (e.g., Theodor-Heuglin-Schule), hospitals (Gesundheitscampus Calw), social housing portfolios (SWSG, Flüwo, Kreisbaugenossenschaft), and corporate campuses (Wolff & Müller).

Differentiating technical capabilities include digital remote monitoring and AI-supported anomaly detection for predictive maintenance, hydraulic optimization for hybrid systems, and wastewater heat recovery paired with brine-to-water heat pumps. The company holds DVGW, SHK Innung, Handwerkskammer Region Stuttgart, and BGHM memberships, runs an in-house Maier Academy for staff training, and maintains official partnerships with Stadtwerke Esslingen (district heating), Senertec, and the Energie unterm Reußenstein cooperative. The current managing director is Dirk Freiland (Dipl.-Ing.), and Matthias Wölpper serves as the dedicated contracting expert. Revenue is not publicly disclosed.

Name

Maier Heiztechnik GmbH

Legal name

Maier Heiztechnik GmbH

Website

https://heizmaier.de

Company type

Private

Founded year

1960

Operating status

Operating

Headcount range

1–10 employees

Short description

Family-owned HVAC contractor based in Köngen, Germany, providing heating, cooling, ventilation, and sanitary systems for residential, commercial, industrial, and public sector clients in the Stuttgart/Esslingen region since 1960, with multi-year energy contracting, maintenance, and 24/7 emergency service.

Ownership category

akta.pro rank

Product category

HVAC Contractor Services

NAICS

Plumbing, Heating, and Air-Conditioning Contractors (238220), Plumbing, Heating, and Air-Conditioning Contractors (23822)

SIC

Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (3585), Heating Equip, Except Elec & Warm Air; & Plumbing Fixtures (3430)

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 services
• Heat pump installation
• Heating system contracting
• Commercial refrigeration
• District heating stations

Headquarters

HQ city

Köngen

HQ country

Germany

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

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

Revenue model

1. Installation and Project Revenue: Revenue from the design, planning, and installation of heating, cooling, air conditioning, ventilation, and sanitary systems for private customers, housing associations, commercial businesses, and public institutions. Includes large-scale systems from 5 kW to 2,000 kW.
2. Anlagen-Contracting (Systems Contracting): Full-service contracting model where Maier Heiztechnik owns, operates, and maintains the heating system on the customer's premises for 15–20 years. Customers purchase energy/heat at a fixed rate. Includes planning, construction, financing, monitoring, maintenance, and emergency service—all delivered by the company's own staff without subcontractors.
3. Heizungs-Miete/Finanzierung (Heating Rental/Financing): Heating rental or financing model where customers pay a fixed monthly installment over a multi-year term (e.g., 10–15 years). The package includes installation, maintenance, remote monitoring, repairs, and emergency service. Title transfers to the customer at the end of the term.
4. Annual Maintenance Contracts: Annual maintenance contracts (Basic, Comfort, Premium tiers) covering planned servicing of heating, climate, and drinking water installations. Includes proactive monitoring, inspections, and preventative maintenance to reduce failures and extend equipment life.
5. Emergency/Notdienst Service: Emergency service revenue for after-hours and weekend callouts. Priority is given to existing customers and contract holders. Notdienst charges include a base call-out fee plus surcharges ranging from 25% to 150% depending on time. New customers without maintenance contracts pay a 250€ travel fee.

Pricing tiers

Go-to-market motion2 records

Distribution channels2 records

Marketing channels8 records

Core offering

Maier Heiztechnik GmbH designs, installs, operates, and maintains heating, cooling, climate, ventilation, and sanitary systems for residential, commercial, industrial, and public-sector customers in the Stuttgart/Esslingen/Köngen region of Baden-Württemberg, Germany. The company delivers its services exclusively through its own staff of approximately 95 employees, covering the full value chain from planning and installation to long-term contracting, maintenance, and 24/7 emergency service. It also offers energy contracting (Anlagen-Contracting) over 15–20 year terms in which it owns, finances, and operates the heating system on the customer's premises.

Product overview

Maier Heiztechnik GmbH is an HVAC (heating, ventilation, air conditioning) contractor offering a comprehensive portfolio of heating, cooling, and sanitary solutions for residential and commercial customers in the Stuttgart/Esslingen region of Germany. The company operates a unified service model where all offerings—heating systems (heat pumps, gas heating, pellet/wood chip systems, district heating stations, hybrid systems, BHKW/CHP), climate control (air conditioning, refrigeration), and sanitary installations—are delivered through their own workforce without subcontractors. The portfolio is unified around the core value proposition of 'everything from one hand' (Alles aus einer Hand), combining equipment supply, installation, maintenance, and energy contracting services. Key brand partners include Viessmann, Bosch/Junkers, Weishaupt, Buderus, Hoval, Daikin, KWB, ÖKOFEN, Remeha, and Remko. The company also offers proprietary services including the Heizmaier Academy for staff training, remote monitoring capabilities, AI-supported anomaly detection for predictive maintenance, and financing/contracting options.

Differentiator

Problem solved

Functional benefit

Products and services

• Wärmepumpen (Heat Pumps) Heat pump systems for heating and cooling, including air-source, ground-source (geothermal), ice storage, cascade configurations, and reversible hybrid units for summer cooling, delivered with planning, installation, and commissioning.
• Gasheizungen (Gas Heating Systems) Gas heating systems including condensing boilers, wall-mounted and floor-standing gas boilers, and H2-ready units capable of operating with up to 20% hydrogen blends.
• Pellet- und Hackschnitzelanlagen (Pellet and Wood Chip Systems) Biomass heating systems using wood pellets or wood chips for residential and commercial applications, with automatic feeding systems and high-efficiency ratings.
• Fernwärmestationen (District Heating Stations) District heating transfer stations that connect buildings to centralized heating networks, optimized for high temperature differential (Delta T) efficiency.
• Klimaanlagen (Air Conditioning) Split and multi-split air conditioning systems for residential and commercial cooling and heating, featuring inverter technology for energy efficiency.
• Hybridanlagen (Hybrid Heating Systems) Combined heating systems integrating multiple energy sources such as heat pumps with gas boilers or biomass, optimized for efficiency and supply security through intelligent control systems.
• Kältetechnik (Commercial Refrigeration and Cooling) Commercial and industrial cooling systems including chillers, cooling towers, precision cooling for server rooms, and process cooling for manufacturing applications.
• Sanitär (Sanitary and Bathroom Installations) Complete bathroom renovation and sanitary installations including barrier-free solutions, fresh water stations, and hygiene systems for residential and commercial projects.
• BHKW (Combined Heat and Power / CHP) Blockheizkraftwerk units that simultaneously generate electricity and heat, designed for buildings with high electricity and heating demands.
• Anlagen-Contracting (Energy Service Contracting) Full-service energy contracting covering planning, construction, financing, operation, remote monitoring, and maintenance of heating systems over contract terms of 15–20 years, with customers paying a fixed rate for delivered heat.
• Annual Maintenance Contracts Annual maintenance contracts in Basic, Comfort, and Premium tiers covering planned servicing of heating, climate, and drinking water installations, including inspections, cleaning, parts replacement, safety checks, optimization, and proactive remote monitoring.
• 24/7 Notdienst (Emergency Call-out Service) 24/7 emergency call-out service delivered by 15 in-house technicians across the Stuttgart/Esslingen region 365 days per year, with priority response for existing contract customers and dedicated phone lines for fault reporting.
• Heizungs-Finanzierung (Heating System Financing and Rental) Heating system financing or rental offering allowing customers to spread investment costs over a multi-year term (10–15 years) with all-inclusive monthly installments covering installation, maintenance, remote monitoring, repairs, and emergency service, with title transferring to the customer at the end of the term.

Quantifiable outcome

• Optimized wood chip plant operating time from 55% to 88% at the Schafhof community heating project in Esslingen
• +2 more outcomes

Named customers11 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

Nine partnerships are on record, tiered core and minor.

• Stadtwerke EsslingencoreStrategic or Co-development PartnerOfficial partner of Stadtwerke Esslingen for the district heating network and customer connections. Maier Heiztechnik coordinates and manages district heating conversions and new connections for customers in Esslingen, supporting the municipal energy transition strategy.
• Energie unterm Reußenstein eG (Neidlingen)coreStrategic or Co-development PartnerPartner of the energy cooperative 'Energie unterm Reußenstein eG' for the EuReG neighborhood heating network in Neidlingen. Responsible for connections and heating systems for all households in the network area.
• SWSG – Stuttgarter Wohnungs- und StädtebaugesellschaftcoreStrategic or Co-development PartnerOfficial partner of SWSG for heating technology, pellet systems, service, and emergency call-out services across SWSG's residential housing portfolio in Stuttgart.
• Flüwo – WohnungsbaugenossenschaftcoreStrategic or Co-development PartnerPartner of the Flüwo housing cooperative for heating technology, service, and emergency call-out services for Flüwo's residential properties.
• SHK Fachverband (SHK Trade Association)minorOthersMember of the SHK (Sanitär-Heizung-Klima) trade association, maintaining professional credentials and industry standards compliance.
• DVGW – Deutscher Verein des Gas- und WasserfachesminorOthersMember of DVGW, the German Technical and Scientific Association for Gas and Water, maintaining certifications for gas and water installations.
• Handwerkskammer Region Stuttgart (Chamber of Crafts Stuttgart)minorOthersRegistered in the crafts register of Handwerkskammer Region Stuttgart ( Betriebsnummer: 12583), confirming licensed tradesperson status.
• Innung Esslingen-Nürtingen (Trade Guild Esslingen-Nürtingen)minorOthersMember of the Innung Esslingen-Nürtingen (guild number 666), demonstrating membership in the regional trade guild for the heating/cooling/plumbing trade.
• Bozic Knights (Basketball Club)minorGTM or Marketing PartnerRegional sponsor of the Bozic Knights basketball club, strengthening community ties and local brand visibility in the Stuttgart/Esslingen region.

Scale indicators5 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Vaillant Group: European HVAC manufacturer (Vaillant, Saunier Duval brands) with a substantial heat-pump portfolio and installer network in Germany. Comparable as a broad incumbent whose heat pumps and service operations compete for the same residential and small-commercial modernization projects.
• Stiebel Eltron GmbH & Co. KG: German heat-pump and hot-water specialist manufacturer with its own installer/service network. Comparable as a heat-pump-focused incumbent whose technology is being specified in many of the same subsidy-driven modernization projects Maier delivers.
• Viessmann Group: Leading German heating technology manufacturer increasingly active in integrated energy solutions and service/contracting. Comparable via its heating systems portfolio and expanding service/contracting offerings that overlap with Maier's heat pump, hybrid, and contracting business.
• Daikin Airconditioning Germany GmbH: Global HVAC manufacturer (heat pumps, AC, refrigeration) with a German subsidiary, service network, and growing commercial contracting footprint. Comparable as a broad incumbent whose equipment Maier installs and whose service operations compete for commercial cooling projects.
• Bosch Home Comfort (Thermotechnik): One of the largest European HVAC manufacturers (Buderus, Junkers brands) with its own installer/service network. Comparable as a broad incumbent in heating and offers overlapping installation/service capability, though primarily a manufacturer.

Direct peers

• Sodexo GmbH (Technical Facility Services): Global facility services operator with significant German technical services delivery covering HVAC maintenance and energy management. Comparable in bundling maintenance contracts with multi-site commercial and institutional clients.
• Gegenbauer Gruppe: German building and technical services group providing HVAC, plumbing, and energy-related services for commercial real estate and public-sector clients. Comparable as a multi-trade technical building services provider with similar recurring-service orientation.
• ENGIE Deutschland GmbH: Large German energy-services and HVAC contractor offering installation, maintenance, and energy contracting across heating, cooling, and building services. Directly comparable as a multi-service HVAC/ESCO player serving commercial, industrial, and municipal customers in Germany.
• Caverion Deutschland GmbH: Nordic-origin technical building services firm with a major German operation delivering HVAC, refrigeration, and plumbing installation plus lifecycle service contracts. Closely comparable service mix, contracting model, and customer profile.
• WISAG Industrie Service Holding SE & Co. KG: Major German integrated facility and building-services group providing HVAC, refrigeration, and technical maintenance to industrial and commercial customers. Comparable in offering ongoing technical service and energy-related building solutions.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks5 records

Key highlights6 records

Customer concentration

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Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 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 Maier Heiztechnik GmbH