Fellner
Fellner GmbH is a family-owned German SHK trades company based in Lübeck that provides heating, plumbing, solar, and biomass system installation and maintenance services to residential homeowners and property managers within a 60 km radius.
- Company typePrivate
- Founded1968
- HeadquartersLübeck, Germany
- Headcount1–10
- GTM typeB2C
- OfferingServices
What Fellner does
Fellner GmbH is a family-owned German trades company (Sanitär-Heizung-Klima) headquartered in Lübeck, Schleswig-Holstein, with a secondary branch in Dunkelsdorf. Founded in 1968 by Kurt Fellner as a small gas and water installation business, the company has evolved into a full-service provider of heating, plumbing, solar, and biomass system solutions for residential homeowners and property managers within a ~60 km radius of Lübeck. Its core service lines include heat pump installation, wood and pellet heating, gas condensing boilers, bathroom renovation, solar thermal, photovoltaic with battery storage, and ongoing service/maintenance. The company is led by brothers John and Edward Fellner, who assumed managing director roles in 2024, marking the third generation of family leadership.
The business operates on a project-based, quote-driven revenue model. Revenue is generated from one-time installation projects (heat pumps, solar, biomass, bathrooms) complemented by recurring service and maintenance contracts. The company does not own proprietary technology platforms; its competitive differentiation rests on master craftsman expertise (John Fellner holds the Meisterprüfung in central heating and ventilation), certified partnerships with major OEMs (Vaillant, Weishaupt, Fröling, Paradigma, Ochsner, Ritter Energie), and a network of allied trades (architects, energy consultants, electricians, tilers). Go-to-market is primarily direct-to-consumer via local field service, supplemented by bathroom exhibition partners (SHK Paulsen, Peter Jensen), a website with customer testimonials, and Facebook/Instagram presence. Pricing is not publicly disclosed and is determined per-project based on on-site assessment.
The company employs approximately 9 people, including two managing directors, an executive assistant, and two plant mechatronics engineers. No external funding, no institutional ownership, and no M&A activity are disclosed. The company is positioned within Germany’s energy transition (Wärmewende) and actively markets government heat pump subsidies (up to 70%) to homeowners, aligning its service portfolio with regulatory tailwinds for renewable heating adoption.
Fellner firmographics
Firmographics- Name
- Fellner
- Legal name
- Fellner GmbH
- Website
- https://fellnergmbh.de
- Company type
- Private
- Founded year
- 1968
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Short description
- Fellner GmbH is a family-owned German SHK trades company based in Lübeck that provides heating, plumbing, solar, and biomass system installation and maintenance services to residential homeowners and property managers within a 60 km radius.
- Ownership category
- akta.pro rank
Fellner industry classification
Industry- Product category
- Heating, Plumbing, and Solar Energy Services
- NAICS
- Plumbing, Heating, and Air-Conditioning Contractors (23822), Plumbing, Heating, and Air-Conditioning Contractors (238220)
- SIC
- Construction - Special Trade Contractors (1700)
- akta.pro primary industry
- Energy & Renewables Specialty Contracting (Solar PV, Storage, EV Charging) (IMAFALAJ)
Keywords
Where Fellner is headquartered
LocationHeadquarters
- HQ city
- Lübeck
- HQ country
- Germany
- HQ region
- Europe
Offices2 records
Markets served
Fellner business model
Business model- GTM type
- B2C
- Offering type
- Services
- Cost components
- Personnel, Supply Chain, Operations, Marketing or Sales, Others
Revenue model
- Installation and Construction Services: One-time service revenue from installation of heating systems (heat pumps, gas condensing boilers, wood heating), plumbing systems, solar thermal, and biomass heating systems. Services include consultation, planning, execution, and commissioning.
- Service and Maintenance: Ongoing revenue from regular maintenance and servicing of heating equipment and plumbing systems, as well as repairs.
Go-to-market motion1 record
Distribution channels1 record
Marketing channels5 records
Fellner product offering
Product offeringCore offering
Fellner GmbH is a family-run trades company that installs, services, and maintains residential heating, plumbing, solar thermal, and biomass energy systems in the Lübeck region. Its core offerings cover heat pumps, wood and gas condensing boilers, solar thermal installations, bathroom planning and renovation, energy concept planning, and ongoing service and maintenance contracts. The firm operates as a single-service portfolio delivered through its own qualified workforce with complementary work (electrical, grid connection) handled by partner firms.
Product overview
Fellner GmbH is a family-owned trades company offering integrated heating, plumbing, and solar energy solutions. The company operates as a single-service portfolio rather than a platform-plus-modules architecture, providing core services in four main areas: (1) Heating systems including heat pumps, wood heating, and gas condensing boilers; (2) Plumbing and bathroom services; (3) Solar energy installations including solar thermal and PV systems with battery storage; and (4) Biomass heating systems. These services are delivered through the company's own qualified workforce, with complementary services like electrical work and grid connections handled by partner firms. The company positions itself as a full-service provider for sustainable building technology, combining traditional craftsmanship with modern energy solutions.
Differentiator
Problem solved
Functional benefit
Products and services
- Heating Systems (Heizung)
Quantifiable outcome
- Up to 70% government subsidy available for heat pump systems
- +1 more outcomes
Companies that use Fellner
Customer profileNamed customers3 records
Segments2 records
Ideal customer profiles2 records
Fellner technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Fellner partnerships and signals
Strategic signalPartnerships
Seven partnerships are on record, tiered minor and core.
- SHK Paulsen - BäderweltenminorBathroom exhibition partner where Fellner GmbH displays products and services. Customers can view bathroom installations and setups at the SHK Paulsen location in Lübeck before engaging Fellner's installation services.
- Peter Jensen - BadpunktminorBathroom exhibition partner where Fellner GmbH showcases products. Customers can explore bathroom options at Peter Jensen locations before commissioning installation work.
- VaillantcoreCertified partner for Vaillant heating products including heat pumps and gas condensing systems. Vaillant is a leading European manufacturer of heating technology.
- WeishauptcorePartner for Weishaupt heating products including burners and complete heating systems.
- FrölingcorePartner for Fröling biomass and wood heating systems, including pellet boilers and wood gasification boilers.
- ParadigmacorePartner for Paradigma solar thermal and biomass products, specializing in sustainable heating solutions.
- OchsnercorePartner for Ochsner heat pump systems, an Austrian manufacturer of air and ground source heat pumps.
Scale indicators3 records
Recent moves7 records
Expansion highlights5 records
Fellner competitors and assessment
Company assessmentBroad incumbents
- Daikin Airconditioning Germany: Global HVAC and heat pump manufacturer with German installer network. Competes with Fellner on heat pump installations for residential customers and operates its own training/certification ecosystem.
- Stiebel Eltron: German heat pump and hot water specialist with a national installer network. Competes with Fellner for the residential heat pump installation market while also supplying product to certified partners.
- Weishaupt: German burner and heating systems manufacturer with established installer network. Already a core partner of Fellner; its national certified contractor base competes with regional SHK installers for premium heating projects.
- Bosch Home Comfort Group: Division of Bosch offering heating, hot water, and air-conditioning solutions including heat pumps. Competes broadly with Fellner via its national installer base and branded service contracts.
- Vaillant: Leading European heating manufacturer (heat pumps, gas condensing boilers). Already a core certified partner of Fellner, but its national dealer network and direct sales channels compete with regional installers for the same residential customers.
- Viessmann: Major German heating manufacturer offering boilers, heat pumps, and complete heating systems. Operates a certified installer partner program that competes with Fellner for premium installation work, while also being a potential OEM partner.
Direct peers
- 1Komma5°: German heat pump, solar, and storage installer operating a franchise-style network across Germany. Competes with Fellner for residential decarbonization projects but with national brand recognition and centralized financing/operations.
- Thermondo: German heat pump and heating installation specialist that scaled from a regional installer to a national player with digital sales. Directly comparable to Fellner in core service (heat pump installation) but competes via scale, marketing, and standardized processes rather than local relationships.
- Enpal: Germany's largest residential solar leasing company, also offering heat pumps and EV charging. Overlaps with Fellner on solar PV installation and battery storage, but uses a leasing/financing model rather than direct purchase and craft-led delivery.
Others
- Fröling Heizkessel- und Behälterbau: Austrian manufacturer of biomass and wood heating systems. Already a core product partner of Fellner; included as ecosystem/peer given its role in shaping biomass installer training and customer lead distribution.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat4 records
Key risks6 records
Key highlights6 records
Customer concentration
Fellner social profiles
Digital presenceFellner financial estimates
Financial estimateRevenue estimate
Valuation estimate
Fellner leadership team
Management profileNumber of profiles
Profiles5 records
Fellner funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Fellner M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Fellner
What does Fellner do?
Fellner GmbH is a family-run trades company that installs, services, and maintains residential heating, plumbing, solar thermal, and biomass energy systems in the Lübeck region. Its core offerings cover heat pumps, wood and gas condensing boilers, solar thermal installations, bathroom planning and renovation, energy concept planning, and ongoing service and maintenance contracts. The firm operates as a single-service portfolio delivered through its own qualified workforce with complementary work (electrical, grid connection) handled by partner firms.
Is Fellner a public or private company?
Fellner is a private company. It is classified as family owned and is currently operating.
When was Fellner founded?
Fellner was founded in 1968. It employs 1 to 10 people.
Where is Fellner based?
Fellner is headquartered in Lübeck, Germany, in the Europe region.
How does Fellner make money?
Two revenue lines are on record. Installation and Construction Services are the primary driver. The others are service and Maintenance.
Who are Fellner's main competitors?
Broad incumbents on record are Daikin Airconditioning Germany, Stiebel Eltron, Weishaupt, Bosch Home Comfort Group, Vaillant and Viessmann. Direct peers are 1Komma5°, Thermondo and Enpal. Fröling Heizkessel- und Behälterbau is listed as an others.
Does Fellner have an API?
No public API is recorded for Fellner.
What industry is Fellner in?
Fellner's product category is Heating, Plumbing, and Solar Energy Services. Its primary akta.pro industry code is IMAFALAJ, Energy & Renewables Specialty Contracting (Solar PV, Storage, EV Charging). Its NAICS code is 23822 and its SIC code is 1700.