Ganzenmueller Gmbh

What Ganzenmueller Gmbh does

Ganzenmüller GmbH is a German family-owned master craftsman business (Meisterbetrieb) founded in 1980 and headquartered in Erbach, Baden-Württemberg, specializing in chimney construction, roofing, carpentry, metalworking, and energy recovery solutions. The firm serves three primary customer segments — private residential homeowners (Privatkunden), commercial and industrial clients (Gewerbe und Industrie), and commercial bakeries (Bäckereien) — across southern Germany (süddeutscher Raum), with references to international bakery clients. Its product portfolio includes single- and double-walled stainless steel chimney systems (Edelstahl-Schornsteinsysteme), roofing services spanning pitched, flat, and metal roofs with solar integration, timber construction (Zimmerei & Holzbau), chimney renovation and relining, and the RETHERM Wärmerückgewinnungsanlage — a TÜV Süd-certified heat recovery system purpose-built for bakery ovens that recovers up to 25% of energy from baking processes via a smooth-tube heat exchanger, integrated suction exhaust, and a Siemens touch-screen control system with web-based access introduced in 2025.

The company's revenue model combines project-based construction and installation services (professional services), sales of in-house manufactured hardware products (hardware sales, all 'Made in Germany'), and energy efficiency consulting including KfW Program 295 and BAFA subsidy advisory. Pricing is quote-based on individual project scope with multi-year contract cadence rather than disclosed standard tiers, and the go-to-market is sales-led: customers reach the firm via website inquiry form, phone (+49 73 92 – 700 10), or email, after which a 'Komplettservice' (full-service) team coordinates planning, execution, and third-party specialists (chimney sweeps, heating engineers, oven manufacturers). A strategic co-development and co-marketing partnership with Werner & Pfleiderer (WP-L) positions the RETHERM system as 'WP RETHERM powered by Ganzenmüller' for joint selling into WP-L's bakery oven ecosystem. The business is led by owner Ulrike Ganzenmüller, a multi-award-winning master roofer (Dachdeckermeisterin) recognized by Handelskammer Ulm for vocational training engagement, and remains privately held with no external investment and 1-10 reported employees as of the latest data.

Name

Ganzenmueller Gmbh

Legal name

Ganzenmüller GmbH

Website

https://ganzenmueller.de

Company type

Private

Founded year

1980

Operating status

Operating

Headcount range

1–10 employees

Short description

Ganzenmüller GmbH is a German family-owned master craftsman business (founded 1980, Erbach) that designs, manufactures, and installs stainless steel chimney systems, roofing, carpentry, and the RETHERM heat recovery system for bakeries across southern Germany. It serves private homeowners, commercial and industrial clients, and commercial bakeries with a project-based one-stop service model.

Ownership category

akta.pro rank

Product category

Specialty Construction and Energy Recovery Services

NAICS

Roofing Contractors (238160)

SIC

Heating Equip, Except Elec & Warm Air; & Plumbing Fixtures (3430)

akta.pro primary industry

Chimney, Parapet & Roofline Masonry Repair (HSAPAKAL)

akta.pro secondary industries

Chimney Relining & Flue Liner Services (HSAEANAD), Chimney Masonry Repair (Crown, Tuckpointing, Brick) (HSAGALAK), Water Heater/Boiler Flue, Venting & Chimney Liner Service (HSAOACAF)

Keywords

• Chimney construction
• Roofing services
• Energy recovery systems
• Stainless steel chimneys
• Carpentry construction

Headquarters

HQ city

Erbach

HQ country

Germany

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

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

Revenue model

1. Construction and Installation Services: Project-based revenue from chimney construction, roofing, carpentry, and metal working services. The company provides complete service from planning to execution, serving private customers, commercial/industrial clients, and bakeries. Revenue is generated through one-time project fees rather than recurring contracts.
2. Product Sales: Sale of stainless steel chimney systems, heat exchangers, RETHERM energy recovery units, and related components. Products are manufactured in Germany (100% made in Germany) and include both standard and custom-designed solutions.
3. Consulting Services: Energy efficiency consulting and advisory services, including assistance with government subsidy programs (KfW, BAFA). The company advises on energy savings concepts and helps customers access funding for energy efficiency investments.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

Ganzenmüller GmbH is a German master craftsman business that constructs stainless steel chimney systems, performs roofing, carpentry, and metalwork, and builds the proprietary RETHERM energy recovery system for bakeries. The company provides full-service project delivery from planning through on-site installation across southern Germany, with all products manufactured in-house in Germany.

Product overview

Ganzenmüller GmbH is a German master craftsman business (Meisterbetrieb) founded in 1980, specializing in chimney systems, roofing, metalworking, and energy recovery solutions. The company operates as a single unified service offering with the following core product lines: (1) RETHERM Wärmerückgewinnungsanlage – a heat recovery system for bakeries that captures waste heat from ovens using a smooth-tube heat exchanger and converts it to usable energy; (2) Edelstahl-Schornsteinsysteme – single and double-walled stainless steel chimney systems for residential and industrial use; (3) Dachdeckerei & Bedachungen – roofing services including pitched roofs, flat roofs, and solar systems; (4) Zimmerei & Holzbau – carpentry and timber construction including roof trusses, dormers, and carports; and (5) Kaminbau & Kaminsanierung – chimney construction and renovation services including particle separators. Services are offered as a complete package with planning, installation, and maintenance from a single provider.

Differentiator

Problem solved

Functional benefit

Brands

• RETHERM: Energy recovery system for bakeries - a heat recovery unit that recovers waste heat from ovens to optimize energy costs and reduce CO2 emissions.

Products and services

• RETHERM Heat Recovery System (WP RETHERM)

Quantifiable outcome

• Up to 25% energy recovery from oven systems in bakeries
• +2 more outcomes

Named customers3 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

Three partnerships are on record, tiered core.

• Werner & Pfleiderer (WP-L)coreStrategic or Co-development PartnerWerner & Pfleiderer (WP-L) is a strategic partner for the RETHERM heat recovery system. The RETHERM system is marketed as 'WP RETHERM powered by Ganzenmüller.' WP-L provides comprehensive information about the heat recovery technology on their website and the partnership enables joint marketing of energy efficiency solutions for bakeries. Ganzenmüller provides the chimney systems and heat recovery expertise while WP-L contributes their oven technology ecosystem.
• KfW Bank (KfW-Programm 295)coreOthersKfW Bank offers Program 295 'Energy Efficiency in Business' which supports investments in waste heat utilization systems. The program provides loans with repayment subsidies for heat recovery installations. Ganzenmüller advises customers on accessing these subsidies and includes subsidy consultation as part of their service offering for energy efficiency projects.
• BAFA (Bundesamt für Wirtschaft und Ausfuhrkontrolle)coreOthersBAFA provides investment subsidies for energy efficiency measures in businesses as an alternative to KfW loans. Ganzenmüller helps customers navigate BAFA funding options for heat recovery and waste heat utilization investments, with subsidies of up to 30% of eligible costs plus SME bonus.

Scale indicators5 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Schiedel: Europe's leading stainless steel chimney and flue system manufacturer. Schiedel is the most direct comparable to Ganzenmüller's Edelstahl chimney systems and Kaminsanierung offering, competing in the same residential and commercial segments with a much larger product catalog and footprint.
• Erlus: German manufacturer of roof tiles and chimney systems (Erlus Kamin). Highly comparable to Ganzenmüller's combined roofing and chimney (Kaminbau + Dachdeckerei) Komplettservice positioning, with stronger brand recognition in southern Germany.
• Plewa: German manufacturer of chimney systems, flue linings, and exhaust systems serving residential and industrial customers. Direct competitor in stainless steel Schornsteinsysteme and Kaminsanierung with overlapping product range and shared DACH market presence.
• Klöber: German manufacturer of roofing accessories, ventilation, and chimney connection products. Comparable to Ganzenmüller in technical roofing and chimney system components, focusing on the same German Meisterbetrieb installer channel.
• Prefa: Austrian manufacturer of aluminum roofing, façade, and rainwater systems serving DACH markets. Comparable to Ganzenmüller's Spenglerei and Dachdeckerei service line, particularly for premium residential renovation projects.
• Zambelli: Bavarian manufacturer of metal roofing, rainwater systems, and rooftop accessories. Comparable to Ganzenmüller's Spenglerei and metalworking offering for residential and commercial roofing projects in the same southern German / Austrian regional market.

Broad incumbents

• Viessmann: German heating, industrial, and refrigeration systems manufacturer. Comparable to Ganzenmüller as a supplier of heating-related equipment and decarbonization solutions, though Viessmann's energy-recovery and climate offerings are part of a much broader portfolio.
• Wienerberger: Austrian-listed global building materials group producing bricks, roof tiles, and chimney systems. Comparable to Ganzenmüller as a chimney and roofing solutions provider, though Wienerberger operates at vastly greater scale across multiple construction categories.
• BMI Group: Global roofing and waterproofing group (formerly Braas Monier). Comparable to Ganzenmüller's Dachdeckerei and roof system offerings, with major operations in pitched and flat roofing across Europe.
• Wolf GmbH: German heating, ventilation, and climate systems manufacturer, comparable to Ganzenmüller in solutions for industrial and commercial heating applications, though Wolf's portfolio extends to much larger commercial HVAC installations.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/ganzenmueller-gmbh

Compliance1 record

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 Ganzenmueller Gmbh