Manufacturer of heat pumps, hot water heaters, ventilation systems and electric heating appliances for building services.
STIEBEL ELTRON GmbH & Co. KG
Holzminden · Höxter · Freudenberg · Eschwege · Hameln · Poprad (SK) · Arvika (SE) · Ayutthaya (TH) · Tianjin (CN)New on Amplifa
About STIEBEL ELTRON
STIEBEL ELTRON is a family-owned company founded in 1924 by Dr. Theodor Stiebel in Berlin, with its headquarters in Holzminden, Lower Saxony. The company develops and produces heat pumps (air/water, brine/water, water/water), hot water heaters and cylinders, ventilation systems with heat recovery, fresh water and heat interface units, as well as electric heating appliances and instantaneous water heaters. In addition to series production, the Eschwege plant manufactures thermoplastic components for the company's own appliances. The value chain includes development, system design, production, assembly, as well as service and maintenance. Engineering services in Holzminden provide heating load calculations according to DIN EN 12831, heat pump and ventilation planning incl. 3D drawings, and profitability analyses according to VDI 2067. With around 5,000 employees worldwide, nine production sites in Germany, Slovakia, Sweden, Thailand and China, revenue of approx. €954 million (2025) and an export share of approx. 50 %, STIEBEL ELTRON supplies over 120 countries. The products are used in residential and non-residential buildings, in housing construction, and in schools, daycare centres, restaurants and offices.
- Site
- Holzminden
- Processes
- Manufacture of heat pumps (air/water, brine/water, water/water), Manufacture of hot water heaters and cylinders (DHW cylinders), Manufacture of ventilation systems / ventilation units with heat recovery, Manufacture of plastic/thermoplastic components, Manufacture of fresh water stations and heat interface units, Manufacture of electric heating appliances, Engineering services: heating load calculation according to DIN EN 12831, Engineering services: design of heat pump systems (hydraulic/electrical, 3D drawings)
- Materials
- Copper, Thermoplastic (plastic components), Natural refrigerant R290 (propane), Thermoplastic polymers
- Certificates
- 100 % function and safety testing of appliances, ISO 9001
- Founded
- 1924
- Employees
- approx. 5000 worldwi
- Industries
- Building services, Heating, ventilation, air conditioning and sanitary technology, Green Tech / Renewable Energy, Residential construction, Non-residential buildings (schools, daycare centres, restaurants, offices), Heating/ventilation/air conditioning and sanitary technology
- 01
Engineering & system design
- 02
Development
- 03
Manufacture of plastic/thermoplastic components
- 04
Component manufacturing
- 05
Appliance assembly
- 06
Individual safety/function testing
- 07
Sales & service/maintenance
Materials & Processes
Thermoplastic polymers
Production of plastic components for all STIEBEL ELTRON appliances at the Eschwege site.
Natural refrigerant R290 (propane)
Used in the new heat pump generation as an environmentally friendly refrigerant.
Copper
Material of the historic immersion heaters (Tauchheizker) from the company's founding era.
Locations
Holzminden
DEHeadquarters, largest production plant, administration, Energy Campus
- Materials
- Metals, plastics
Höxter
DEHeat pump production
Freudenberg
DEProduction of heat pump ventilation systems
Eschwege
DEProduction of plastic parts, small hot water heaters
- Materials
- Thermoplast
Hameln
DEProduction of fresh water stations, heat interface units
Poprad
SKProduction of hot water heat pumps, hot water cylinders
Arvika
SEProduction of brine heat pumps (Thermia AB)
Ayutthaya
THProduction of compact instantaneous water heaters, instantaneous water heaters, cylinders
Tianjin
CNProduction of ventilation systems, heat pumps, electric heating
Products & Components
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Manufacture of heat pumps (air/water, brine/water, water/water)Assembly | – | – | – | – | Metals, Plastics |
| Manufacture of hot water heaters and cylinders (DHW cylinders)Assembly | – | – | – | – | – |
| Manufacture of ventilation systems / ventilation units with heat recoveryAssembly | – | – | – | – | – |
| Manufacture of plastic/thermoplastic componentsPlastics | – | – | – | – | Thermoplast |
| Manufacture of fresh water stations and heat interface unitsAssembly | – | – | – | – | – |
| Manufacture of electric heating appliancesAssembly | – | – | – | – | – |
| Engineering services: heating load calculation according to DIN EN 12831Engineering | – | – | – | – | – |
| Engineering services: design of heat pump systems (hydraulic/electrical, 3D drawings)Engineering | – | – | – | – | – |
| Engineering services: design of ventilation systems (incl. 3D diagram)Engineering | – | – | – | – | – |
| Engineering services: profitability analysis according to VDI 2067 (annuity method)Engineering | – | – | – | – | – |
| Manufacture of immersion heaters (coil immersion heaters)Assembly | – | – | – | – | Copper |
| Manufacture of hot water heaters up to 600 litre capacity (historical)Assembly | – | – | – | – | Copper (historical, banned from 1937) |
Additional services
Quality
Every appliance is tested for safety and functionality before packaging. Systematic incoming goods inspections, proven production processes and multiple checks ensure production quality.
| Evidence | Holzminden | Höxter | Freudenberg | Eschwege | Hameln | Poprad | Arvika | Ayutthaya | Tianjin |
|---|---|---|---|---|---|---|---|---|---|
| 100 % function and safety testing of appliances | |||||||||
| ISO 9001 |
History
- 1924
Founded by Dr. Theodor Stiebel in Berlin; invention and production of the immersion heater
- 1927
First foreign subsidiary in London
- 1944
Relocation of the company to Holzminden after the destruction of the Berlin plants
- 1977
Development and production of heat pumps
- 2007
Opening of the Energy Campus as a training and communication centre
- 2018
Thermia AB (Sweden) becomes part of the Group
- 2020
Strategic stake in Zimmermann Ventilation and Heating Systems (Freudenberg)
- 2024
100 years of STIEBEL ELTRON