AHS

What AHS does

AHS GmbH is a regional German trades company based in Greifswald, Mecklenburg-Vorpommern, that installs and maintains plumbing, heating, climate/ventilation, solar thermal, and photovoltaic systems for residential customers. Founded in March 2004 by Maik Stamer as a sole proprietorship under the name 'Ausbau Aller Art,' the company was converted into a limited liability company (GmbH) at the end of 2012 and today operates with 11-50 employees from its headquarters at Baustr. 20, Greifswald.

The company's core offering is full-service home renovation and climate technology, including complete bathroom modernization (Komplettbadsanierung) coordinated from planning through installation across multiple trades, heating system replacement and maintenance (gas condensing units, heat pumps, underfloor heating), air conditioning and ventilation installation, and certified solar thermal and photovoltaic system deployment. AHS also sells and installs premium partner-brand products from hansgrohe and AXOR for bathroom and kitchen fixtures, and offers an emergency repair service for plumbing and heating. The underlying technology is established third-party equipment rather than proprietary systems, and the company's value is delivered through project execution and trade coordination.

AHS generates revenue through two streams: installation and service fees (project-based professional services) and product sales (hardware including heating units, climate systems, solar panels, and branded bathroom fixtures). The go-to-market is sales-led and consultative, with on-site consultations, individualized quotes, and an online heating inquiry configurator for top-of-funnel lead capture. Customer acquisition relies almost exclusively on referrals and word-of-mouth in the Greifswald region. Pricing is quote-based with free, non-binding offers, and the business is privately held by founder Maik Stamer with no external investors, no subsidiaries, and no disclosed financial figures.

Name

AHS

Legal name

AHS GmbH

Website

https://ahs-stamer.de

Company type

Private

Founded year

2004

Operating status

Operating

Headcount range

11–50 employees

Short description

AHS GmbH is a Greifswald-based regional trades company that installs, services, and modernizes plumbing, heating, climate/ventilation, solar thermal, and photovoltaic systems for residential homeowners across Mecklenburg-Vorpommern, Germany.

Ownership category

akta.pro rank

Product category

Building Trades Services (HVAC, Plumbing, Solar Installation)

NAICS

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

SIC

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

akta.pro industry

PRIMARYHSAOAGAI

Ventilation System Installation (Exhaust Fans, ERV/HRV, Make-Up Air)

Home & Personal Services/Plumbing, Electrical & HVAC Services/HVAC Installation & Replacement

SECONDARYHSAOAIAF

Ventilation System Installation & Repair (Bath/Kitchen Fans, ERV/HRV)

Home & Personal Services/Plumbing, Electrical & HVAC Services/Air Duct Cleaning, Ventilation & Indoor Air Quality Services

Keywords

• Bathroom renovation services
• Heating system installation
• Solar thermal installation
• Photovoltaic system installation
• Climate ventilation services

Headquarters

HQ city

Greifswald

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

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

Revenue model

1. Installation and Services: Revenue is generated through installation services, maintenance, and repairs for plumbing, heating, cooling, solar thermal, and photovoltaic systems. The company operates as a full-service trades provider offering project-based services from planning through installation to after-sale maintenance. The business model emphasizes comprehensive service packages including coordination of multiple trades for complete bathroom renovations.
2. Product Sales: Revenue includes the sale and installation of heating systems (gas condensing units, heat pumps, underfloor heating), air conditioning and ventilation units, solar thermal and photovoltaic systems, and sanitary fixtures. As a partner of hansgrohe and AXOR premium brands, the company supplies and installs branded bathroom products.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

AHS GmbH is a regional German trades company that installs, maintains, and repairs plumbing, heating (gas condensing units, heat pumps, underfloor heating), air conditioning and ventilation, solar thermal, and photovoltaic systems for residential customers. Its flagship offering is Komplettbadsanierung — complete bathroom renovation coordinated from a single source — along with supply and installation of premium bathroom and kitchen products from partner brands hansgrohe and AXOR.

Product overview

AHS GmbH is a service company offering integrated home technology installation and renovation services. The company provides a unified portfolio of services centered around bathroom renovation (Komplettbadsanierung), heating systems, climate/ventilation, solar thermal, and photovoltaics - all delivered from a single source with coordinated trades. The core offering combines plumbing, heating, and air conditioning services with additional specialized offerings including ceiling systems, interior construction, and tiling. As a partner installer, the company also offers premium brands hansgrohe and AXOR for bathroom and kitchen fixtures. The company operates on a service-based model rather than a software/product platform architecture.

Differentiator

Problem solved

Functional benefit

Products and services

• Bad (Bathroom Services) Complete bathroom renovation services (Komplettbadsanierung) including planning, installation, and coordination of all required trades, offering complete bathroom modernization from a single source for residential homeowners.
• Heizung (Heating Services) Heating system services including gas condensing units, underfloor heating, heat pump systems, and oil-to-gas conversion, including maintenance, repair, and emergency services for residential customers.
• Klima / Lüftung (Climate and Ventilation Services) Climate control and ventilation solutions including air conditioning units, climate systems, climate technology, and mobile climate devices for residential customers.
• Solarthermie (Solar Thermal) Solar thermal systems for hot water and heating support, including consultation, installation, commissioning, and maintenance for residential customers.
• Photovoltaik (Photovoltaics) Photovoltaic system planning and installation for residential, commercial, and municipal applications, including consultation, grid registration, and insurance advice.
• Weitere Leistungen (Additional Services) Additional construction services including tension ceiling systems, individual interior construction, drywall installation, door fitting, roof window installation, and tiling work for residential customers.
• Dachklempnerei (Roofing and Drainage) Roof drainage systems including classic rain gutters and custom customer requests for residential properties.
• Notdienst (Emergency Service) Emergency plumbing and heating repair services available for urgent situations for residential customers.
• hansgrohe Products Premium bathroom and kitchen products from brand partner hansgrohe, supplied and installed by AHS as part of its complete bathroom renovation services for residential customers.
• AXOR Products Premium design bathroom and kitchen products from brand partner AXOR, supplied and installed by AHS as part of its complete bathroom renovation services for residential customers seeking luxury, customizable finishes.

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Two partnerships are on record, tiered minor.

• AXORminorChannel Partner/ Reseller/ DistributorAHS GmbH is a partner for AXOR, a premium design brand for bathrooms and kitchens. AXOR collaborates with world-renowned designers to create avant-garde collections. AHS installs AXOR products as part of their bathroom renovation services, offering customers premium design options.
• hansgroheminorChannel Partner/ Reseller/ DistributorAHS GmbH is a partner for hansgrohe, a premium brand for bathroom and kitchen. Hansgrohe is known for award-winning products combining German engineering with pioneering spirit. AHS supplies and installs hansgrohe products as part of their complete bathroom solutions.

Scale indicators2 records

Recent moves8 records

Expansion highlights4 records

Emerging players

• Enpal: Germany's largest residential solar leasing company, now expanding into heat pumps and EV charging. Comparable to AHS in residential renewable installation services, with a fundamentally different financing/leasing business model.
• Zolar: Online platform connecting German homeowners with regional solar and heat pump installers. Comparable to AHS's residential renewable services; functions as both potential competitor and lead-generation partner.
• 1Komma5°: German decarbonization installer offering heat pumps, solar, and EV charging as an integrated package. Comparable to AHS's combined heating/solar/PV offering but operating a digitally enabled, multi-city franchise model.

Direct peers

• Thermondo: German heat pump and heating installer serving residential customers end-to-end. Directly comparable to AHS as both install modern heating systems for German homeowners, though Thermondo operates at national scale with proprietary digital tooling.

Regional players

• Enerix: German franchise network of regional solar and battery storage installers. Comparable to AHS in residential PV installation services; operates through a partner model that could represent a scaling path for AHS.

Broad incumbents

• Stiebel Eltron: German heat pump and hot water specialist with deep installer relationships. Comparable to AHS in the heat pump and DHW space; a leading brand whose certified partners compete with AHS in residential heat pump installations.
• Vaillant: Major German HVAC manufacturer with a strong heat pump portfolio and certified installer network ('Vaillant Profi'). Comparable to AHS in heat pump and heating technology, but operating as a manufacturer whose installer program is the industry benchmark.
• Viessmann: One of Germany's largest HVAC manufacturers (heat pumps, boilers, climate systems). Indirectly comparable to AHS as the equipment supplier behind many of AHS's heating installations; broad incumbent shaping the SHK installer ecosystem.
• Daikin Germany: Global HVAC manufacturer with a major German presence in air conditioning and heat pumps. Comparable to AHS through their installer program for residential climate and heat pump installations.
• Buderus: Bosch-owned HVAC brand covering heating, heat pumps, and climate systems with a national installer network. Comparable to AHS as the equipment supplier ecosystem they participate in; broad incumbent in the German SHK market.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights6 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 AHS