L-H gas type conversion

Due to the decline in low-calorific gas (L-gas) production in Germany and the Netherlands, the natural gas supply structure in the north and west of Germany will change by the year 2030. In a step-by-step process the gas supply of the affected area is converted from low-calorific to high-calorific gas (H-gas).


We are certified according to DVGW G 676-B1 Group B & C and offer the following services:

  • Quality control of survey and adaptation measures for gas appliances in accordance with DVGW G 695 (M) during the market area conversion
  • Advising industrial customers on organization and implementation
  • Advising network operators in the course of planning
  • Maintenance of the DVGW gas appliance database

Our fitters are qualified in accordance with the DVGW’s “Basic module for gas appliance adaptation for L-H market area conversion” and “Specialist for gas appliance adaptation for L-H market area conversion” as well as additional training from well-known appliance manufacturers. Even before 1995, we were already working for 47 different clients (energy suppliers and industrial companies) on the conversion from town gas to natural gas. We carried out project management and quality assurance for domestic and commercial installations.

L-H gas market area conversion projects – quality assurance of the survey and adjustment:

  • Stadtwerke Hemer GmbH (2021 – 2023)
  • Stadtwerke Iserlohn GmbH (2021 – 2023)
  • Stadtwerke Menden GmbH (2021 – 2023)
  • Stadtwerke Schwerte GmbH (2021 – 2023)
  • Dortmunder Netz GmbH (2021 – 2023)
  • LSW Netz GmbH & Co. KG (2018 – 2022)
  • Rhein-Sieg Netz GmbH (2018 – 2022)
  • Westerwald Netz GmbH (2018 – 2022
  • Stadtwerke Wissen GmbH (2018 – 2021)
  • e-regio GmbH & Co. KG (2018 – 2021)
  • EnergieNetz Mitte GmbH (2018 – 2020)
  • Stadtwerke Weilburg GmbH (2018 – 2019)
  • Stadtwerke Nienburg/Weser GmbH (2016 – 2017)
  • Stadtnetze Neustadt am Rbge. GmbH (2016 – 2017)
  • Qualitätssicherung für die DVGW-Anpassungsdatenbank im Auftrag des DVGW (seit 01/2016)

Participation in DVGW committees

Research projects

> 61000


currently running

in preliminary phase

gas appliances tested
(as of 09/2023)

Your contact to us


Tom Gregor

(+49) 3731 – 41 95 359

Your career at the DBI Group

Over 150 motivated employees, flat hierarchies and a pleasant working atmosphere are the hallmarks of a committed team. We see ourselves as a reliable employer that supports and challenges its employees throughout their careers. We employ people who are committed to our corporate goals. We are a family-friendly company and expressly follow the legal principles of equal treatment.

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