HVAC – Heating, Ventilation and Air Conditioning segment

| Selfio SE | |
|---|---|
| Registered office: | Koblenz |
| HRB: | District Court of Koblenz under HRB 30594 |
| Management Board: | Andreas Odenbreit, Ling Fan-Montzka |
| Sector: | Online trading in HVAC |
| Ownership structure: | 100% 3U HOLDING AG |
| In the Group since: | June 2011 through new formation |
Selfio SE is a provider of high quality products from the areas of heating, sanitary as well as solar heat and energy generation. Emerging in 2011 from former Hambach & Schmucki GbR which had successfully operated for over ten years, Selfio GmbH focuses on marketing floor heating systems and solar thermal systems for hot water and supplementary heating, as well as furnaces, chimneys and ventilation systems. The company’s targets the group of do-it-yourselfers. Based on years of experience in the heating and ventilation industry, Selfio provides professional support for new construction and properties requiring refurbishment. All products are sold directly and primarily online. At the same time, Selfio provides its customers with comprehensive advisory services and detailed instructions designed to facilitate the work of do-it-yourselfers.
Further information is available at selfio.de

| PELIA Gebaeudesysteme GmbH | |
|---|---|
| Registered office: | Koblenz |
| HRB: | District Court of Koblenz under HRB 28197 |
| Board of Directors: | Sven Grafe, Christian Harms-Ensink |
| Sector: | HVAC |
| Ownership structure: | 100% 3U HOLDING AG |
| In the Group since: | August 2012 through new formation |
Established in 2012 and headquartered in Koblenz, PELIA Gebäudesysteme GmbH (formerly: 3U Einkauf & Logistik GmbH) is a production and trading company targeting the wholesale business and a supplier of purchasing and logistics services for technical building equipment. The company focuses on products for floor heating/heating, controlled ventilation, sanitary, solar, energy and heat generation, along with heat storage and heat supply.
With its ClimaTE 25 dry screed system, PELIA sells a floor heating system developed in house that has proven itself many times in practical use, which underscores PELIA’s expertise in this segment.
PELIA Gebäudesysteme GmbH is a wholly-owned subsidiary of listed management and investment company 3U HOLDING AG.
The company’s products are produced, stored, picked and dispatched in its own approximately 14,000 sq m production and logistics centre in Koblenz.
PELIA focuses on supplying professional wholesalers across the whole of Europe.
Further information is available at pelia.de
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| EMPUR® Produktions GmbH | |
|---|---|
| Registered office: | Buchholz-Mendt |
| HRB: | District Court of Montabaur under HRB 13616 |
| Board of Directors: | Sven Eckert, Sven Grafe, Christian Harms-Ensink |
| Sector: | HVAC |
| Ownershipt structure: | 100% PELIA Gebäudesysteme GmbH |
| In the Group since: | January 2025 through acquisition |
As part of the HVAC business unit of 3U HOLDING AG, EMPUR Produktionsgesellschaft mbH has been developing and manufacturing high-quality surface heating and cooling systems for many years. The product range includes practical, complete solutions for both new construction and renovation – from planning and production to delivery. With state-of-the-art manufacturing technologies, its own quality management system in accordance with DIN EN ISO 9001, and close cooperation with skilled trades, EMPUR stands for durability, efficiency, and ease of installation.
Together with its sister companies PELIA Gebäudesysteme GmbH and CALEFA GmbH, EMPUR covers a broad spectrum of innovative HVAC solutions that meet the increasing demands for energy efficiency and sustainability.
Further information is available at empur.com.

| EMPUR® Produktions GmbH | |
|---|---|
| Registered office: | Koblenz |
| HRB: | District Court of Koblenz under HRB 28488 |
| Board of Directors: | Sven Eckert, Sven Grafe, Christian Harms-Ensink |
| Sector: | HVAC |
| Ownershipt structure: | 100% PELIA Gebäudesysteme GmbH |
| In the Group since: | April 2019 through new formation |
CALEFA GmbH is a reliable partner for system providers and specialist companies in building services engineering, offering practical solutions and a high level of in-house production. Based in the Cologne/Bonn metropolitan area, the company specializes in the development and production of modern underfloor heating systems – from the manufacturing of individual components to complete system solutions for new builds and renovations. State-of-the-art production facilities, precise quality controls, and close collaboration with the skilled trades ensure durable, efficient, and installation-friendly products.
Together with its sister companies EMPUR Produktionsgesellschaft mbH and PELIA Gebäudesysteme GmbH, CALEFA offers a broad portfolio of innovative HVAC solutions that meet the increasing demands for energy efficiency and sustainability.