About us

Expertise for over 30 years

For over 30 years, ERT Refrigeration Technology GmbH has been providing components and systems for industrial and process cooling, water technology, waste heat recovery and cryogenic cryogenic engineering.


As a family-run company, we attach great importance to trusting relationships with our customers and employees. Our cooperation is characterized by openness, loyalty and commitment.


Dynamic in the planning, committed in the execution. With efficient solutions we accompany our customers from the requirement profile to the successful completion of the project and a sustainable result.


As a system installer, component supplier, engineering partner, service provider and consultant, we push the individual goals of our customers. Our experts are at your side from the needs analysis, planning, system selection and implementation to commercial plant operation.


Innovative developments, such as in the cryogenic low temperature range – for liquefying methane to LNG and hydrogen to liquid hydrogen – are driven by us and offer very future-oriented and environmentally relevant topics.

Our history


Foundation ERT Refrigeration

The founder Gerhard Asmus had the idea to start his own company using his knowledge, experience and relationships, after a career in sales of cryogenic equipment at Philips and process water chillers at Alfa Laval. In doing so, he had the image of a family business in his sights from an early stage. With the active participation of his wife and children, Sven Asmus and Birgit Asmus, ERT Refrigeration Technology GmbH was founded in 1987. Initially, an office room was set up in his own house and a warehouse in a small wooden hut in the garden.

The contractual connection to two internationally active partners from Belgium and the Netherlands gave ERT the starting signal in 1987 as a factory representative and service partner. The exclusive cooperation with Baltimore Aircoil International n.v. and Philips Tieftemperaturtechnik, today Stirling Cryogenics b.v. as the sales organization in the North and Germany-wide distribution and also in the field of maintenance, service and repair of the machines and equipment produced by these companies, has helped to build up and expand a long-standing customer base. Most of these customers are still existing today and can look back on a long and trustful cooperation.


Expansion of the fields of activity

In 1992, the growing order situation was accompanied by the expansion of the office space. Additional fields of activity, for example in the area of system plant construction, ensured an increase in the number of employees.


Increase in number of employees & move to new office building

The limited space situation made it necessary to move again. In 2010, the company finally moved into a new office building with a large warehouse, workshop and modern offices in Beutnerring 5 in the south of Hamburg.

Innovative developments bring our family business further and further forward. In addition to our membership in various professional, political associations and participation in meetings in federal ministries, we are also present at events, conferences and trade fairs and are constantly expanding our expertise and our network in innovative fields such as water technology, industrial cooling, methane gas liquefaction and cryogenics, also for superconducting systems.


ERT now

With currently approx. 18 employees, we are still on a growth course. As an engineering partner in the fields of process and industrial cooling, water technology and plant control, we offer leading expertise based on many years of experience.

We are looking forward to your project!

Call us: 49 40 7610 480

Kontaktieren Sie uns gerne für eine persönliche Beratung. Sobald wir mit Ihnen alle Bedingungen bestimmt haben, erarbeiten wir ein individuelles Vorgehen für die bestmöglichste und effizienteste Projektabwicklung.