What Stamos does

Stamos GmbH is a family-owned master craftsman HVAC contractor headquartered in Grevenbroich, Germany, serving the Rhein-Kreis Neuss region in North Rhine-Westphalia. The firm employs approximately 40 staff (30 employees plus 10 apprentices) and operates two logistics warehouses (opened in 2016 and 2022) to support fast regional deployment. The company is led by managing directors Alexander Stamos and Heiko van Bergen and is registered as STAMOS GmbH (HRB 16796, Amtsgericht Mönchengladbach).

The business spans three building technology disciplines: Heating Technology (heat pumps, condensing boilers, solar thermal, wood pellets, fuel cells), Water Technology (drinking water treatment, filtration, softening, leakage protection via SYR products), and Electrical Technology (photovoltaics, battery storage, energy management, EV charging, Mieterstrom tenant electricity). Technical capabilities are anchored by multi-vendor certified partnerships with Viessmann, Stiebel Eltron, ÖkoFEN, Hager, Jaga, SYR, and Pluggit, plus specialist credentials including VDI 4645 heat pump qualification. Differentiated offerings include hydraulic balancing (up to 25% energy savings), drone-surveyed PV consultation, and project consulting for multi-family buildings.

The revenue model combines (i) one-time equipment sales and installations, (ii) recurring maintenance service contracts with disclosed hourly rates (€82.86–€92.50/hr), (iii) subscription-based contracting via mehrwärme (15-year heating rental) and Stadtwerke Neuss (water technology packages €10–€41.50/month), and (iv) consulting and emergency services. Go-to-market is primarily field-service led through in-house technicians, supplemented by a 24/7 online shop, active social media presence, and institutional contracting channels. Stamos actively participates in the BMBF DigiWerk SME digitalization research project.

Name

Stamos

Legal name

STAMOS GmbH

Website

https://stamos.de

Company type

Private

Operating status

Operating

Headcount range

11–50 employees

Short description

Stamos GmbH is a family-owned German HVAC contractor in Grevenbroich that sells, installs, and maintains heating, water, and electrical building systems for residential and small commercial customers in the Rhein-Kreis Neuss region.

Ownership category

akta.pro rank

Product category

HVAC Contracting 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 Equipment, Except Electric & Warm Air Furnaces (3433), Cogeneration Services & Small Power Producers (4991), Heating Equip, Except Elec & Warm Air; & Plumbing Fixtures (3430)

akta.pro primary industry

HVAC & Refrigeration Contracting (IMAFALAB)

akta.pro secondary industries

Building Automation & Controls (BAS/BMS) Contracting (IMAFALAE), Residential HVAC System Installation (Furnace/AC/Heat Pump) (HSAOAGAA), Commercial HVAC/R Installation (Rooftop Units, Split Systems) (HSAOAGAH)

Keywords

• HVAC contracting services
• Heating installation and maintenance
• Water treatment systems
• Renewable energy contracting
• Building services engineering

Headquarters

HQ city

Grevenbroich

HQ country

Germany

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

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

Revenue model

1. Product Sales (Heizung, Wassertechnik, Elektrotechnik): Sale of heating systems, water treatment equipment, electrical installations, and related products. Includes heat pumps, condensing boilers, solar thermal systems, pellet heating, water filters, and EV charging stations.
2. Maintenance Services: Regular maintenance services for heating systems including gas, oil, pellet, solar, heat pumps, water softening, and ventilation systems. Priced per hour or as fixed-price packages based on system capacity.
3. Contracting (Heizung mieten): Monthly rental model for heating systems through mehrwärme partnership. Customers pay a fixed monthly rate for 15 years including installation, maintenance, and 24-hour emergency service. Also includes water technology contracting through Stadtwerke Neuss.
4. Consulting Services: Energy consulting, project consulting, and concept consulting for heating and photovoltaic systems. Includes on-site consultations and technical advice for optimal solutions.
5. Emergency Service: After-hours emergency repair services for customers with maintenance contracts, available daily from 4 PM to 10 PM.

Pricing tiers

Go-to-market motion2 records

Distribution channels4 records

Marketing channels8 records

Core offering

Stamos GmbH is an SHK-certified HVAC contractor that sells, installs, maintains, and rents heating, water treatment, and electrical systems for private homeowners and commercial property owners. Its offering spans fossil and renewable heating technologies (heat pumps, condensing boilers, solar thermal, wood pellets, fuel cells), photovoltaic and EV charging infrastructure, digital water treatment and leak protection, and subscription-based heating and water contracting delivered through mehrwärme and Stadtwerke Neuss partnerships. The company serves the Rhineland region of North Rhine-Westphalia from Grevenbroich with a 16–25 person workforce including apprentices.

Product overview

Stamos GmbH is a family-owned HVAC (heating, ventilation, air conditioning) contractor based in Grevenbroich, Germany, operating as a master craftsman business (Meisterbetrieb) in the Rhein-Kreis Neuss region. The company offers a comprehensive portfolio of building technology services organized into three main divisions: Heating Technology (Heiztechnik) including heat pumps, condensing boilers, solar thermal, wood pellets, and fuel cells; Water Technology (Wassertechnik) encompassing drinking water treatment, filtration, softening, and leak protection systems; and Electrical Technology (Elektrotechnik) covering photovoltaics, energy storage, energy management, and EV charging infrastructure. Beyond equipment installation, Stamos provides extensive services including emergency repair, regular maintenance, hydraulic balancing, energy consulting, and two contracting models: (1) the mehrwärme/german contract heating rental model for up to 15 years, and (2) Stadtwerke Neuss water technology contracting for leak protection, filtration, and softening. The company maintains an online shop for direct service booking including maintenance services for Viessmann (gas/oil), ÖkoFEN (pellets), Stiebel Eltron (heat pumps/ventilation), and SYR (water systems), as well as consultation services for heating and PV projects. Stamos employs approximately 30 staff and 10 apprentices, operates two logistics warehouses, and holds VDI 4645 qualification for heat pump systems.

Differentiator

Problem solved

Functional benefit

Products and services

• Heat Pump Systems (Wärmepumpen) Heat pump installation, integration, and maintenance service for residential and commercial customers seeking renewable heating. The offering is led by a VDI 4645-certified managing director.
• Condensing Boiler Technology (Brennwerttechnik) Installation and maintenance of condensing boiler systems for residential and commercial heating applications.
• Solar Thermal Systems (Solarthermie) Design and installation of solar thermal systems for hot water generation and heating support.
• Wood Pellet Heating (Holzpellets) Installation and maintenance of wood pellet heating systems for residential and commercial buildings.
• Fuel Cell Heating (Brennstoffzelle) Installation and integration of fuel cell systems delivering combined heat and power for buildings.
• Photovoltaic Systems (Photovoltaik) Sale, design, and installation of photovoltaic systems supported by PV consultation and CAD-based planning.
• Energy Management Systems (Hager) Installation of Hager energy management hardware and software for monitoring energy flows and optimizing tariff use.
• EV Charging Stations (Wallbox) Sale, installation, and electrical integration of EV charging wallboxes for residential and commercial properties.
• Tenant Electricity Model (Mieterstrom) Service to design and operate tenant electricity schemes where PV-generated power is supplied directly to tenants.
• Drinking Water Treatment (Trinkwasseraufbereitung) Sale and installation of SYR digital drinking water treatment systems to ensure hygiene and water quality in buildings.
• Leak Protection Systems (Leckageschutz) Sale and installation of leak protection / water leak detection systems that prevent water damage in buildings.
• Hydraulic Balancing (Hydraulischer Abgleich) Adjustment of heating distribution to ensure even heat output across radiators and circuits, improving efficiency.
• Heating Contracting (mehrwärme) Subscription-based heating contracting model where Stamos installs, owns, and operates the heating system in exchange for a recurring fee.
• Water Technology Contracting (Stadtwerke Neuss) Subscription-based water technology contracting service delivered in partnership with Stadtwerke Neuss.
• 24/7 Emergency Service (Notdienst) 24/7 emergency response service for residential and commercial HVAC, water, and electrical failures.
• Heating Concept Consultation (Heizungskonzept) Consultative heating concept design service for new buildings and modernization projects.
• Heating Project Consultation (Heizungsprojekt) Consultative project planning for heating installations including sizing, technology selection, and cost estimation.
• PV Concept Consultation (PV-Konzept) Consultative PV system design service to evaluate feasibility, sizing, and financial return for prospective photovoltaic customers.
• Multi-Brand Heating Maintenance (Wartung) Recurring maintenance contracts for multiple heating brands including Viessmann, Vaillant, Junkers/Bosch, Stiebel Eltron, Buderus, and Wolf, with dedicated brand-specific service technicians.
• On-Site Service Fee (Vor-Ort Servicepauschale) Standardized flat fee for a single on-site service visit covering travel and base labor for maintenance, inspection, or reactivation work.
• Heating System Reactivation (Wiederinbetriebnahme) Service to re-commission heating systems after extended shutdown, including safety checks and operational restart.
• Gas Line Inspection (Prüfung Gasleitungsanlage) Safety inspection service for gas line installations to verify compliance with applicable regulations.

Quantifiable outcome

• Energy savings up to 25% through hydraulic balancing
• +2 more outcomes

Named customers3 records

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration3 records

Feature5 records

Partnerships

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

• mehrwärme / German ContractcoreStrategic or Co-development Partner · 1 January 2016Exclusive contracting partnership for heating rental model. mehrwärme provides the financing and contract management while Stamos serves as the specialized installation and service partner. Customers rent heating systems for up to 15 years with full service included.
• Stadtwerke NeusscoreStrategic or Co-development PartnerWater technology contracting partnership. Stadtwerke Neuss provides financing and contract management for water protection solutions while Stamos serves as the specialized trades partner for installation and maintenance of leakage protection, water filters, and softening systems.
• HagercoreTechnology or IntegrationCertified partnership for electrical installations. Stamos provides modern electrical building technology solutions using Hager products including energy distribution, storage systems (Hager Flow), and energy management solutions.
• Jaga Climate DesignersmajorTechnology or IntegrationLong-standing partnership for low-temperature heat pump radiators. Jaga produces award-winning heating and cooling solutions compatible with heat pumps and solar systems, operating at low water temperatures for maximum efficiency.
• ViessmannmajorTechnology or IntegrationBrand partner for gas and oil heating systems. Stamos provides maintenance services for Viessmann gas systems and offers Viessmann products for heating installations.
• ÖkoFENmajorTechnology or IntegrationTop Partner status for pellet heating systems. Stamos provides maintenance services for ÖkoFEN pellet systems across various capacity ranges.
• Stiebel EltronmajorTechnology or IntegrationPartnership for heat pump systems and ventilation. Stamos provides maintenance for Stiebel Eltron ground water, air, and hot water heat pumps, as well as ventilation systems.
• SYR (Saint-Gobain)majorTechnology or IntegrationWater technology partner for SYR leakage protection systems, water filters (DRUFI+), and water softening units (LEX Plus 10 Connect). Products offered both for direct purchase and via contracting.
• BMBF Verbundprojekt DigiWerkminorStrategic or Co-development PartnerResearch partnership in BMBF-funded digitalization project for SME craft businesses. Project with Heinrich-Heine-Universität Düsseldorf, University of Cologne, and other SHK companies to develop digitalization guidelines and tools. Funding of approximately €2 million over three years.
• Heinrich-Heine-Universität DüsseldorfminorStrategic or Co-development PartnerAcademic research partner in DigiWerk project. Led by Chair for Business Administration, especially Work, Personnel and Organization, along with Institute for Medical Sociology and Institute for Occupational, Social and Environmental Medicine.
• Fachverband Sanitär Heizung Klima NRWminorGTM or Marketing PartnerTrade association partner in DigiWerk research project representing SHK industry interests.
• Paul Jacobs GmbHminorStrategic or Co-development PartnerSME partner in BMBF DigiWerk project alongside Stamos and Schöllgen Haustechnik GmbH.
• Schöllgen Haustechnik GmbHminorStrategic or Co-development PartnerSME partner in BMBF DigiWerk project alongside Stamos and Paul Jacobs GmbH.
• K12 Agentur für Kommunikation und Innovation GmbHminorStrategic or Co-development PartnerCommunication consulting partner in DigiWerk project providing digitalization consulting expertise.

Scale indicators5 records

Recent moves8 records

Expansion highlights6 records

Direct peers

• GA-tec Gebäude- und Anlagentechnik GmbH: One of the larger German building-services contractors offering HVAC, electrical, and energy solutions across multiple regions. Comparable as a full-service HVAC/MEP contractor with broader geographic reach than Stamos.
• Schöllgen Haustechnik GmbH: SHK craft business and fellow DigiWerk consortium partner with Stamos. Comparable as a regional NRW-based HVAC/water/electrical contractor serving residential and commercial customers with similar service scope.
• Gegenbauer Holding GmbH & Co. KG: Berlin-based building services and technical facility management group with HVAC and energy-related services. Comparable as a German full-service technical building services provider, though materially larger and more diversified than Stamos.
• Paul Jacobs GmbH: German SHK craft business located in NRW that is explicitly named as a co-participant alongside Stamos in the BMBF DigiWerk research project. Comparable as a regional heating/water/electrical specialty contractor of similar size.

Broad incumbents

• Stiebel Eltron GmbH & Co. KG: German manufacturer specializing in heat pumps, hot water, and ventilation technology. Stamos is a certified partner; Stiebel Eltron is comparable as an upstream brand that also sells and services direct in Germany.
• Viessmann Climate Solutions: Major German manufacturer of heating, industrial and refrigeration systems. Stamos is a certified Viessmann service/installation partner; Viessmann is comparable as the dominant upstream brand across Stamos's gas, oil, and heat pump offerings.
• Vaillant Group: Leading European manufacturer of heating, ventilation, and air-conditioning technology headquartered in Germany. Comparable as a broad incumbent whose heat pump and condensing boiler portfolio overlaps directly with Stamos's installation mix.
• Bosch Thermotechnik GmbH: Subsidiary of Bosch manufacturing heating and hot water solutions including the Buderus and Junkers brands in Germany. Comparable as a broad incumbent whose condensing, heat pump, and hybrid offerings overlap with Stamos's portfolio.
• ENGIE Deutschland GmbH: Large German subsidiary of global energy services group offering HVAC, energy efficiency, and building technology solutions. Overlaps with Stamos in heating, heat pump, and energy management services but operates at national scale.

Others

• mehraermea / German Contract Contracting GmbH: Contracting partner that finances and manages the 15-year heating rental model in which Stamos acts as the specialized trades partner. Comparable as a key channel/ecosystem participant, not a competing contractor, but central to Stamos's recurring-revenue model.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/user/StamosGmbH/featured
• Facebookfacebook.com/stamosgmbh
• Instagraminstagram.com/stamos_gmbh
• TikTokvm.tiktok.com/ZML5H9wGu

Compliance9 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 Stamos