What CAlor GmbH does

CAlor GmbH is a family-owned German HLSK (Heating, Ventilation, Sanitation, Air Conditioning/Refrigeration) trade contractor headquartered in Frammersbach, Bavaria, and operating since 1972/73. The company installs, services, and repairs heating systems, heat pumps, photovoltaic-plus-storage solutions, sanitary installations, ventilation and air conditioning, and industrial refrigeration for both private residential customers and commercial/industrial clients (hotels, automotive dealerships, manufacturing plants, care homes, office parks). Core technical capability spans energy-efficient heat pump systems (including R290 natural refrigerant), process steam and industrial hot water provision, and integrated home energy management through a partnership with HSL Solar and the E.ON Home Energy Management System.

Revenue is generated primarily through one-time installation projects billed on labor (€16.50 net per 15-minute Arbeitswert, zone-based vehicle allowances from €19.50 to €78.50, assignment flat rates from €25 to €130 net depending on day/time) plus pass-through materials, and through ongoing maintenance, repair, and 24/7 emergency service contracts. The GTM is field-sales-led and direct, with regional coverage in Main-Spessart and the Rhein-Main area (and via HSL Solar, Bavaria/Hesse/Baden-Württemberg), inbound digital lead generation through online assessment and subsidy-calculation tools, and bottom-of-funnel conversion supported by named enterprise references.

The corporate structure includes two wholly-owned subsidiaries—Heizung-Lüftung-Sanitär GmbH (founded 1989/90) and Calor TGA Planungs GmbH (founded 2021, providing HOAI-compliant planning and object supervision)—creating a vertically integrated platform from system design through installation and lifetime service. Leadership rests with managing director Klaus Bauer and authorized officer Eva Bauer (who also heads Calor TGA Planungs GmbH), reflecting continued family control following the 2002 passing of founders Alfred and Günther Bauer.

Name

CAlor GmbH

Legal name

Calor GmbH

Website

https://calor-gmbh.de

Company type

Private

Founded year

1972

Operating status

Operating

Headcount range

1–10 employees

Short description

CAlor GmbH is a family-owned German HLSK trade contractor (heating, ventilation, sanitation, refrigeration) founded in 1972 in Frammersbach, Bavaria, serving residential and commercial/industrial customers in the Main-Spessart and Rhein-Main regions with installation, maintenance, and emergency services.

Ownership category

akta.pro rank

Product category

HVAC and Building Services Contracting

NAICS

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

akta.pro primary industry

HVAC Installation, Service & Repair (IMAIABAA)

akta.pro secondary industries

HVAC & Refrigeration Contracting (IMAFALAB), Residential HVAC System Installation (Furnace/AC/Heat Pump) (HSAOAGAA), Heat Pump Repair & Maintenance (HSAOAHAD)

Keywords

• HVAC installation services
• Heat pump systems
• Sanitary installations
• Refrigeration technology
• Building services engineering

Headquarters

HQ city

Frammersbach

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

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

Revenue model

1. Installation Services (HVAC/HLSK): One-time installation of heating, ventilation, sanitation, and air conditioning systems for residential and commercial customers. Revenue is earned per project based on labor and materials. The company handles installations across new construction and retrofits, including industrial projects.
2. Maintenance, Repair, and Emergency Services: Ongoing revenue from scheduled maintenance contracts and on-demand repair/emergency service calls. Billed using a structured fee schedule: labor in 15-minute increments (AW = €16.50), zone-based vehicle allowance, assignment flat rates, and materials at cost. A 24/7 emergency service is available during heating season (October–March) and on weekends/public holidays in summer.
3. Material Sales (as part of installation/repair): Materials required for installation and repair work—including heating systems, sanitary fixtures, ventilation components, and spare parts—are billed at prevailing distributor and supplier price lists, forming part of the overall project or service invoice.

Pricing tiers

Go-to-market motion3 records

Distribution channels3 records

Marketing channels5 records

Core offering

CAlor GmbH is a German heating, ventilation, sanitation, and air conditioning (HLSK) contractor that installs, maintains, and services technical building systems for residential and commercial/industrial customers. Core offerings include heating systems, heat pumps, sanitary installations, ventilation/air conditioning, refrigeration technology, and photovoltaic integration (via partnership with HSL Solar). The company also operates a planning subsidiary (Calor TGA Planungs GmbH) and provides 24/7 emergency service.

Product overview

CAlor GmbH is a traditional heating, ventilation, sanitation, and refrigeration (HLSK) contractor offering a comprehensive portfolio of technical building services. The core offering includes heating systems, heat pumps, photovoltaic installations (via HSL Solar partnership), refrigeration technology, sanitary installations, and ventilation/air conditioning systems for both residential and commercial/industrial customers. The company operates as a unified platform with the subsidiary Calor TGA Planungs GmbH (established 2021) providing specialized planning and consulting services. Additional service modules include customer service, maintenance, repair, and emergency services. Products are offered as integrated solutions rather than standalone offerings, with emphasis on combining heat pumps with photovoltaic and battery storage for comprehensive home energy management.

Differentiator

Problem solved

Functional benefit

Products and services

• Heizungstechnik (Heating Technology) Installation, maintenance, and repair of heating systems including gas, oil, heat pumps, and renewable energy solutions for residential and commercial customers. Covers industrial hot water provision, process steam supply, and heating for larger building complexes.
• Wärmepumpen (Heat Pumps) Energy-efficient heat pump systems that convert electrical energy into heating energy (approximately 3-5 kWh heat from 1 kWh electricity). Available heat sources include air, earth, and water, with natural refrigerants like R290 (propane) for renewable energy compliance. Includes suitability analysis, subsidy calculation, and cost estimation tools.
• Photovoltaik (Photovoltaic Systems) Solar energy solutions provided in partnership with HSL Solar, including photovoltaic modules for clean electricity generation, battery storage for excess power, and integration with heat pumps for comprehensive home energy management coordinated through E.ON Home Energy Management System (HEMS).
• Kältetechnik (Refrigeration Technology) Industrial refrigeration solutions characterized by high energy efficiency, reliability, and flexibility. Applications include food processing, pharmaceutical industry, storage of sensitive goods, and other industrial uses.
• Sanitäranlagen (Sanitary Systems) Sanitary installations for commercial and industrial environments including fixtures, toilets, washbasins, and shower systems, with focus on drinking water hygiene and compliance with drinking water regulations.
• Lüftungs- und Klimatechnik (Ventilation and Air Conditioning) Room climate solutions and ventilation technology for controlling temperature, air quality, and humidity. Includes air humidifiers and dehumidifiers to maintain optimal air humidity levels.
• Badsanierung (Bathroom Renovation) Custom bathroom design and renovation services, from timeless classics to modern spa areas, including planning and professional execution for residential customers.
• Calor TGA Planungs GmbH (Planning Services) Planning and consulting subsidiary for heating, ventilation, sanitary, and air conditioning systems according to HOAI standards. Services include consultation, planning, optimization, tendering, coordination, object supervision, acceptance, performance measurement, functional testing, execution, and technical documentation.
• Notdienst (Emergency Service) 24/7 emergency repair service available outside regular business hours, including weekends and public holidays, for urgent heating and sanitary emergencies. Available year-round for commercial customers and during heating season (October-March) and weekends/holidays in summer for residential customers.
• Kundendienst (Customer Service and Maintenance) Maintenance services, troubleshooting, and repair work for heating, sanitary, and air conditioning systems. Includes modern special tools and digital technology for efficient service delivery under maintenance contracts.

Quantifiable outcome

• Up to 70% state subsidy (BEG heating support) available for qualifying heat pump installations.
• +2 more outcomes

Named customers11 records

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

Feature4 records

Partnerships

Three partnerships are on record, tiered core.

• HSL SolarcoreStrategic or Co-development PartnerCalor GmbH partners with HSL Solar (founded 2008, ~80 employees) to deliver combined photovoltaic and heat pump solutions to residential customers in Bavaria, Hesse, and Baden-Württemberg. HSL Solar handles PV planning, installation, registration, and commissioning; Calor provides heat pump installation and system integration. Together they offer an end-to-end renewable energy solution coordinated through the E.ON Home Energy Management System. The partnership is prominently featured on Calor's website and in their marketing materials.
• E.ON (Home Energy Management System)coreTechnology or IntegrationCalor integrates the E.ON Home Energy Management System (HEMS) into its combined PV + heat pump + storage solutions. The HEMS coordinates energy generation, consumption, storage, and heat pump operation to maximize self-consumption of solar power and optimize energy efficiency throughout the day and across seasons.
• Calor TGA Planungs GmbHcoreStrategic or Co-development PartnerFounded in 2021 as a subsidiary of Calor GmbH, Calor TGA Planungs GmbH provides technical building services planning (Heizung, Lüftung, Sanitär, Klima) under HOAI. The subsidiary leverages the 50+ years of execution experience of Calor GmbH, enabling a seamless transition from planning to installation for customers. Operations span Main-Spessart and the broader Rhein-Main region.

Scale indicators4 records

Recent moves7 records

Expansion highlights5 records

Broad incumbents

• Gegenbauer Holding GmbH & Co. KG: Berlin-based facility management and technical building services group providing HVAC, refrigeration, and sanitary maintenance across Germany. Comparable through its multi-trade TGA service portfolio that competes with Calor for commercial servicing contracts.
• ENGIE Deutschland: Cologne-based energy and facility-services provider with a strong HVAC, refrigeration, and energy-management practice. Comparable through its commercial and industrial heating/cooling services and as a competing destination for larger enterprise building-technology contracts in Germany.
• Viessmann Climate Solutions: Global heating, industrial and refrigeration systems manufacturer headquartered in Allendorf, Germany. Comparable because Viessmann sells through — and increasingly supports — an installer partner network that competes with Calor's residential and commercial service offerings.
• Bosch Home Comfort (Bosch Thermotechnik): German heating, heat-pump, and hot-water manufacturer organized around an authorized installer partner program. Comparable as a heating-equipment incumbent that competes for the same customer projects Calor services across Bavaria, Hesse, and Baden-Württemberg.
• Daikin Deutschland: German arm of the Japanese HVAC, heat-pump, and refrigeration manufacturer. Comparable because Daikin's heat-pump and VRF/VRV commercial product lines compete with Calor's commercial HVAC and refrigeration work and route installs through local partners.
• Stiebel Eltron Deutschland: German heat-pump and hot-water technology manufacturer with deep domestic installer relationships. Comparable in product scope (heat pumps, hot water, ventilation) and in its reliance on local craft installers such as Calor for last-mile service delivery.
• Vaillant Group (Deutschland): Remscheid-based heating, heat-pump, and ventilation manufacturer with a nationwide "VProfi" installer network across Germany. Overlaps with Calor's commercial and residential heating business and competes for the same end customers in Calor's regional footprint.
• WISAG Industrie Service Holding: Frankfurt-headquartered industrial and facility-services group with dedicated HVAC, refrigeration, and building-technology divisions operating across Germany. Comparable through its commercial refrigeration and HVAC service business, which overlaps with Calor's commercial Kältetechnik and Heizungstechnik services.

Direct peers

• Thermondo GmbH: Berlin-based heat pump and home heating installer serving German residential customers with an industrialized sales-and-installation model. Direct peer to Calor's residential heat-pump offering though operating at significantly larger scale and with venture capital backing.

Emerging players

• SAUTER Deutschland: German building automation and HVAC services provider focused on technical facility management, energy optimization, and heating/cooling retrofit projects. Comparable on the energy-management and HVAC-services overlap with Calor's commercial offerings, though more automation-centric.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks10 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/CalorGmbh
• Instagraminstagram.com/calor_gmbh
• LinkedInlinkedin.com/company/calor-gmbh

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 records

Subsidiaries2 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 CAlor GmbH