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STIEBEL ELTRON was founded by Dr. Theodor Stiebel, a German engineer and entrepreneur who invented the coil immersion water heater while studying engineering in Berlin.

In 1924, he established the company “ELTRON Dr. Theodor Stiebel” and began manufacturing immersion heaters in a small backyard workshop in Berlin. The innovative product quickly gained popularity because it was more efficient, safer, and more durable than competing designs.

As demand increased, the company expanded its manufacturing facilities and broadened its product portfolio.

During World War II, the Berlin factory was destroyed. In 1944, the company relocated to Holzminden, where its global headquarters remain today.

Over the following decades, STIEBEL ELTRON became one of Germany’s leading manufacturers of electric water heaters before expanding into renewable energy technologies such as:

• Heat pumps

• Solar thermal systems

• Ventilation systems

• Integrated home energy solutions

In 2024, the company celebrated its 100th anniversary, marking a century of innovation in sustainable building technology. [1]

STIEBEL ELTRON’s philosophy is rooted in the vision of founder Dr. Theodor Stiebel:

• Develop products that consume less energy

• Improve user comfort

• Increase safety

• Deliver premium German engineering

• Support sustainable living through renewable energy

The company’s modern slogan emphasizes “Sustainable Comfort”, reflecting its focus on reducing carbon emissions while maintaining high living standards. [1]

1. Instantaneous (Tankless) Water Heaters

One of STIEBEL ELTRON’s signature product lines.

Features include:

• Electric tankless operation

• Continuous hot water supply

• Compact design

• High energy efficiency

• Electronic temperature control

• Residential and commercial models

These products are popular throughout Europe, Asia, North America, Australia, and other global markets.

2. Heat Pumps

The company is considered one of Europe’s pioneers in heat pump technology.

Its offerings include:

• Air-to-water heat pumps

• Ground-source (geothermal) heat pumps

• Domestic hot water heat pumps

• High-temperature heat pumps

• Commercial heat pump systems

Many of the latest models use natural refrigerants, such as R290 (propane), to improve efficiency and reduce environmental impact. [1]

3. Ventilation Systems

STIEBEL ELTRON manufactures mechanical ventilation systems with heat recovery (MVHR) that:

• Improve indoor air quality

• Recover heat from exhaust air

• Reduce heating costs

• Lower energy consumption

These systems are widely used in energy-efficient homes and commercial buildings.

4. Electric Heating

Products include:

• Panel heaters

• Fan heaters

• Convection heaters

• Underfloor heating controls

• Bathroom heaters

5. Domestic Hot Water Systems

The company offers:

• Storage water heaters

• Heat pump water heaters

• Cylinders

• Water heating accessories

6. Integrated Energy Systems

Modern systems combine:

• Heating

• Cooling

• Hot water

• Ventilation

into a single integrated solution designed for low-energy and passive homes.

Innovation has been central to STIEBEL ELTRON since its founding.

The company reports that it has filed more than 1,700 patent applications and registered designs since 1924. Notable milestones include:

• First coil immersion heater

• Hydraulic instantaneous water heaters

• Fully electronic tankless water heaters

• Advanced heat pump systems

• Integrated home energy systems

• Heat pumps using natural refrigerants

• Classroom ventilation systems with heat recovery

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Today, STIEBEL ELTRON operates:

• Multiple production facilities in Germany and abroad

• Approximately 5,000 employees

• 26 sales companies

• More than 120 sales organizations and agencies worldwide

Its products are distributed across Europe, Asia-Pacific, North America, Latin America, Africa, and the Middle East.

The company emphasizes:

• German engineering

• Comprehensive product testing

• Quality inspections throughout manufacturing

• Safety testing for every unit before shipment

• Long product lifespans

• Reliable after-sales service through regional partners

A major focus of STIEBEL ELTRON is supporting the transition away from fossil fuels through technologies such as:

• Heat pumps

• Renewable electricity integration

• Heat recovery ventilation

• High-efficiency electric water heating

• Smart home energy management

These technologies are intended to help reduce greenhouse gas emissions and improve building energy performance. [1]

STIEBEL ELTRON products are widely sold in:

• Germany

• United Kingdom

• France

• Netherlands

• Australia

• New Zealand

• United States

• Canada

• Philippines

• Singapore

• South Africa

• Various countries across Europe, Asia, and Latin America

The brand is generally associated with:

Strengths

• Premium German engineering

• High product quality

• Long service life

• Strong energy efficiency

• Advanced heat pump technology

• Reliable tankless water heaters

Typical Positioning

STIEBEL ELTRON is commonly positioned as a premium to upper mid-range manufacturer, competing with brands such as Viessmann, Vaillant, Bosch Home Comfort, NIBE, Mitsubishi Electric, and Daikin, particularly in the markets for heat pumps and sustainable building technologies. [1]

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STIEBEL ELTRON is one of Germany’s longest-established and most respected manufacturers of energy-efficient building technology. Founded in 1924, it has evolved from producing electric immersion heaters into a global supplier of premium water heating, heat pump, ventilation, and integrated home energy systems. With a century-long focus on engineering quality, innovation, and sustainability, the company continues to play a significant role in the transition toward low-carbon residential and commercial buildings. [1]

1. About STIEBEL ELTRON

2. The History of Stiebel Eltron | Stiebel Eltron Americas