Franz

What Franz does

Frenz GmbH is a German master craftsman (Meisterbetrieb) plumbing and heating company headquartered in Heiligenhaus, North Rhine-Westphalia. Founded in 1983 and now operated under second-generation family management by Marcel Frenz as sole managing director (Geschäftsführer), the firm serves residential property owners across Heiligenhaus, Ratingen, Velbert, Wülfrath, Essen, and surrounding areas, with a small commercial extension into industrial and gastronomy ventilation. The legal entity is a private GmbH registered at Amtsgericht Wuppertal (HRB 17493), with no external investors, parent company, or subsidiaries identified. Headcount is reported at 1–10 employees, consistent with a small artisan operation.

The company's product portfolio is centered on Vaillant heating technology, installed exclusively under a long-standing partnership: gas condensing systems (up to 109% norm efficiency), oil condensing heating (up to 105% efficiency), solar thermal, heat pumps drawing 75% of energy from ambient sources, and full distribution including radiators, underfloor heating, and hydraulic balancing. Complementary offerings include complete bathroom renovation (Komplettbad), barrier-free bathroom design for accessibility, a bathroom showroom and wholesaler exhibition referral service, sanitary infrastructure (house water connection, filtration, softening, pressure reduction, full-house piping), residential ventilation and air conditioning (including multi-split cooling systems), commercial ventilation for industry and gastronomy, and a dedicated 24/7 emergency hotline (Notdienst) routed via a separate domain (frenz-notdienst.de).

Frenz generates revenue primarily through project-based installation and construction contracts, with optional recurring maintenance agreements (Wartungsvertrag) providing a modest annuity layer. The go-to-market is sales-led and direct: customers contact the firm by phone or in-person, master craftsmen are dispatched for on-site consultation, and quotes are produced per project with no public pricing. There is no disclosed digital marketing, social media presence, or app; distribution is entirely field-based within a defined NRW service radius. Pricing, revenue figures, and project volumes are not publicly disclosed.

Name

Franz

Legal name

Frenz GmbH

Website

https://frenz-gmbh.de

Company type

Private

Founded year

1983

Operating status

Operating

Headcount range

1–10 employees

Short description

Frenz GmbH is a second-generation master craftsman plumbing and heating company based in Heiligenhaus, Germany, serving residential and select commercial customers across the NRW region with Vaillant heating systems, bathroom renovations, plumbing, ventilation, and 24/7 emergency service.

Ownership category

akta.pro rank

Product category

Heating, Plumbing, and Bathroom Renovation Services

NAICS

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

SIC

Heating Equipment, Except Electric & Warm Air Furnaces (3433), Heating Equip, Except Elec & Warm Air; & Plumbing Fixtures (3430)

akta.pro primary industry

HVAC & Refrigeration Contracting (IMAFALAB)

akta.pro secondary industries

Boiler & Hydronic Heating System Installation (HSAOAGAF), Boiler & Hydronic Heating Repair & Service (HSAOAHAG), Residential HVAC System Installation (Furnace/AC/Heat Pump) (HSAOAGAA)

Keywords

• Heating installation services
• Plumbing services
• Bathroom renovation
• Hvac services
• Master craftsman services

Headquarters

HQ city

Heiligenhaus

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

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

Revenue model

1. Installation and Construction Services: Frenz GmbH generates revenue through on-site installation of heating systems, bathroom remodeling, plumbing infrastructure, and ventilation/climate systems. Revenue is primarily project-based and one-time, with optional maintenance contracts for recurring service revenue.

Go-to-market motion1 record

Distribution channels1 record

Core offering

Frenz GmbH is a Meisterbetrieb (master craftsman trade business) that sells and installs heating systems (gas condensing boilers, oil heating, solar thermal, heat pumps from Vaillant), designs and renovates complete bathrooms including barrier-free variants, and provides plumbing infrastructure (water filtration, softening, pressure reduction, full-house piping). It also installs residential ventilation and air conditioning systems and commercial supply/exhaust ventilation for industry and gastronomy, supported by a 24/7 emergency repair hotline (Notdienst). All work is delivered as on-site craft services in Heiligenhaus, Ratingen, Velbert, Wülfrath, Essen and surrounding municipalities.

Product overview

Frenz GmbH is a master craftsman plumbing and heating company offering integrated building services. The portfolio centers on Vaillant-powered heating solutions (gas, oil, heat pumps, solar thermal) and comprehensive bathroom renovation (complete bathrooms, barrier-free bathrooms, showroom). Additional offerings include sanitary systems (water filtration, softening, piping), residential and commercial ventilation/air conditioning, and 24/7 emergency services. The company serves the Heiligenhaus, Ratingen, Velbert, Wülfrath, and Essen region as a second-generation family business since 1983.

Differentiator

Problem solved

Functional benefit

Products and services

• Gas Heating (Gasheizung) Installation of modern Vaillant gas condensing heating systems with efficiency up to 109%, including gas house connection and in-house piping, for residential property owners in the Heiligenhaus service area.
• Oil Heating (Ölheizung) Installation of Vaillant oil condensing heating systems achieving up to 105% efficiency, suitable for new construction and modernization of residential heating.
• Solar Thermal (Solarthermie) Installation of solar thermal systems for hot water preparation and solar heating support, utilizing free solar energy with available government funding support.
• Heat Pump (Wärmepumpe) Installation of heat pump systems that generate heating from renewable energy sources (air, ground, or groundwater), using only 25% electricity as drive energy.
• Heating Service (Heizungs-Service) Comprehensive heating services including new installation, regular maintenance under service contracts, and repair services with access to a 24/7 emergency hotline.
• Complete Bathroom Renovation (Badezimmer Komplett-Service / Komplettbad) Complete bathroom renovation service coordinating painters, electricians, tilers, and drywall contractors, providing a single point of contact for stress-free bathroom remodeling.
• Barrier-Free Bathrooms (Barrierefreie Bäder) Accessible bathroom design and installation services for elderly or disabled individuals, with necessary free spaces and assistive devices for independent use.
• Bathroom Showroom (Badausstellung) Bathroom exhibition showroom displaying example bathrooms, furniture, accessories, and fixtures; also facilitates accompanied visits to wholesaler exhibitions with consultation.
• House Water Connection (Hauswasseranschluss) Installation and maintenance of the house water connection, forming the primary supply interface between the utility and the property.
• Water Filtration, Softening, and Pressure Reduction (Wasserfilter / Enthärtungsanlagen / Druckminderer) Water quality improvement services including filtration systems, softening installations to reduce limescale, and pressure-reducing valves to protect plumbing and appliances.
• Whole-House Piping (Verrohrung im ganzen Haus) Complete water distribution piping services covering full-house routing of water lines for new builds and renovations.
• Residential Ventilation (Wohnraumlüftung) Residential ventilation systems providing fresh air without heat loss, with pollen and fine dust filtration and excess moisture removal.
• Air Conditioning (Klimaanlagen) Modern high-efficiency air conditioning split units enabling comfortable cooling even at temperatures above 30°C, including multi-split systems for whole-house cooling.
• Commercial Supply and Exhaust Ventilation (Be- und Entlüftungsanlagen Industrie & Gastronomie) Commercial and industrial supply and exhaust ventilation systems for industrial facilities and gastronomy businesses.
• 24/7 Emergency Service (Notdienst) Round-the-clock emergency plumbing and heating repair service accessible via frenz-notdienst.de and a dedicated phone hotline, available 24/7 outside standard business hours.

Quantifiable outcome

• Gas condensing technology achieves up to 109% norm efficiency
• +2 more outcomes

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

One partnership is on record.

• VaillantcoreTechnology or IntegrationFrenz GmbH has a long-standing partnership with Vaillant, a heating technology company from Remscheid with over 140 years of experience. Frenz exclusively installs Vaillant heating systems including gas condensing boilers, oil heating, solar thermal, and heat pumps. Vaillant provides the core technology and products that Frenz installs and services for end customers.

Scale indicators1 record

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Daikin: Daikin is a global HVAC and heat pump manufacturer with a strong German installer network. It is comparable because it supplies competing heat pump and air-conditioning technology for the same residential and light-commercial retrofits Frenz services.
• Viessmann: Viessmann is a leading German manufacturer of heating, industrial, and refrigeration systems. It is comparable as a competing premium heating brand that Frenz customers might alternatively choose, and its installer networks serve the same residential renovation market in Germany.
• Buderus (Bosch Thermotechnik): Buderus, part of Bosch, manufactures heating and hot-water systems and operates a large German installer network. It is comparable as a parallel premium brand competing with Vaillant for residential heating installations in the same NRW region.
• Stiebel Eltron: Stiebel Eltron is a major German manufacturer of heat pumps, hot water, and ventilation technology. It is comparable as a competing premium brand for the heat pump and residential ventilation products that Frenz installs.
• Vaillant: Vaillant is Frenz's exclusive heating equipment supplier and one of Germany's largest heating OEMs (gas, oil, heat pumps, solar). It is comparable because it defines the technology stack Frenz installs and competes indirectly through its own installer networks.
• Wolf (part of Bosch): Wolf is a German heating, ventilation, and solar OEM within the Bosch Home Comfort group. It is comparable as a parallel heating brand whose products compete with Vaillant for installer and homeowner selection in Germany.

Emerging players

• Enpal: Enpal is a German residential solar, heat pump, and battery leasing company scaling aggressively across Germany. It overlaps with Frenz's heat pump and solar thermal offerings but reaches customers via digital/financing-led channels rather than local field service.

Direct peers

• 1Komma5° (formerly Thermondo): 1Komma5° is a fast-scaling German residential heat pump and energy installer offering end-to-end digital customer journeys. It is comparable because it competes for the same German homeowner installing heat pumps and modern heating, but at much greater scale and with a digital-first model.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks6 records

Key highlights5 records

Customer concentration

• LinkedInlinkedin.com/company/frenz-gmbh

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 Franz