DVGW – Test laboratory energy

Before a product can be used, it must be put through its paces. Gas appliances, fireplaces, fittings and similar systems in particular are subject to strict requirements that ensure a long and safe product life cycle. As an internationally recognized test laboratory, we have extensive expertise in carrying out type examination tests in various areas in accordance with the applicable national and international standards. Using state-of-the-art measurement technology and testing equipment, we carry out type examination tests on typical domestic appliances for our customers.

Our test laboratory can draw on many years of experience, as the two DBI gas appliance and burner testing laboratories in Freiberg and Leipzig applied for and successfully passed accreditation as DVGW test laboratories back in the early 1990s. The many years of activity as an ASMW test center in the GDR contributed to the experience in the relevant testing activities. Thanks to the modernization of the testing equipment and facilities, it is possible in our test laboratory to test not only gas appliances but also equipment parts and appliances for solid and liquid fuels. At the beginning of 2000, testing activities were relocated from Leipzig to Freiberg.

The test laboratory is accredited in accordance with DIN EN ISO/IEC 17025. It is recognized by DVGW CERT GmbH and other notified bodies. In addition, the DBI Group is involved in numerous national and international committees for the further development of standards in order to reflect and help shape the current state of the art at all times.

Fields of activity

The DVGW Energy Test Laboratory carries out type examinations for products in the field of gas applications, gas distribution and for appliances operated with solid or liquid fuels. With regard to the certification of products, you can contact DVGW CERT GmbH, where we are a recognized testing laboratory. An application for certification must be submitted prior to testing.

Our highly qualified employees offer you services in various fields of work:

  • Testing of fittings and pressure devices
  • H2-Ready warranty mark
  • Testing of gas and oil appliances
  • Testing of appliances for the combustion of biomass
  • Testing of construction products
  • According to EN 14800, EN 15069, EN 331, EN 12809, EN 12815, EN 13229, EN 13240, EN 14785, EN 15250, EN 16510 series
  • Individual testing/on-site testing at the customer’s premises
  • Calibrations
  • Special tests
  • Hydrogen and other alternative gases/gas mixtures
  • Solar simulation
  • Salt spray chamber
  • DBI test mark, for the successful testing of a product within the DBI Group
  • Other areas of responsibility:
  • Tests according to BEG EM of BAFA funding
  • EU energy consumption labeling & eco-design tests / evaluations


Test procedures in the scope of flexible accreditation according to category III
Our accredited test laboratory offers a comprehensive range of test procedures. The current list for updating the changes to the relevant test procedures in the flexible scope can be found in the following table (+)

Certificate: D-PL-11072-01-02
Test procedureEditionDescription
DIN 18852
2022-10Equipment for commercial kitchens – Frying and grilling appliances – Requirements and testing
DIN 18857-1
2022-11Equipment for commercial kitchens – Part 1: Tilting fry pans – Requirements and testing
DIN 30695-1
2022-05Mobile melting kettles with LPG-burners – Part 1: Safety requirement, testing, marking
DIN 306992022-05Stationary LPG lamps – Requirements and testing
DIN EN 497
(EN 497)
2022-09Specification for dedicated liquefied petroleum gas appliances – Multi purpose boiling burners for outdoor use – Cooking vessels with a diameter greater than 300 mm; German version EN 497:2022
DIN EN 13203-2
(EN 13203-2)
2022-10Gas-fired domestic appliances producing hot water – Part 2: Assessment of energy consumption;
German version EN 13203-2:2022
DIN EN 13203-3
(EN 13203-3)
2022-10Gas-fired domestic appliances producing hot water – Part 3: Assessment of energy consumption of solar supported gas-fired appliances; German version EN 13203-3:2022
DIN EN 13203-4
(EN 13203-4)
2022-10Gas-fired domestic appliances producing hot water – Part 4: Assessment of energy consumption of gas combined heat and power appliances (mCHP) producing hot water and electricity; German version EN 13203-4:2022
DIN EN 15502-2-1
(EN 15502-2-1)
Gas-fired central heating boilers – Part 2-1: Specific standard for type C appliances and type B2, B3 and B5 appliances of a nominal heat input not exceeding 1000 kW; German version EN 15502-2-1:2022
DIN EN 17476
(EN 17476)
2022-11Specifications for dedicated liquefied petroleum gas appliances – LPG vapour pressure appliances incorporating a horizontal cartridge in the chassis; German version EN 17476:2021+A1:2022
DVGW G 621
2022-03Gas Installations in Laboratories and Scientific Classrooms – Planning, Construction, Modification, Maintenance and Operation

Update of the changes to the relevant test procedures in the flexible scope of application
Status: 17.01.2023

The right equipment for the right solution.

  • Pressure measuring devices for working range: 10 Pa to 1600 bar
  • Test benches for pressure generation:
    • Up to 600 bar with air
    • Up to 1600 bar with water or oil
  • Equipment for temperature measurement in the range:
    -196 °C to 1200 °C
  • Temperature control options
    • -40 °C to +70 °C in climate cell
    • Ambient temperature up to 95 °C with humidity between 5 % and 95 %
    • Ambient temperature up to 800 °C in the oven
  • Flow meters for different fluids and ranges:
    • Flow rates for gases: 20 ml/h to 160 m3/h
    • Flow rates for water: 1 l/h to 10,000 l/h
  • Gas mixing system for mixing test gases according to standard or customer requirements
  • Leakage measuring devices for various fluids:
    • Air, gas mixtures, water
    • He/H2 leak detectors
  • Analyzers
    • Emission measurements: O2, CO2, CO, NOx, CxHy, particle measurement (mass concentration and / or particle count)
    • Gas chromatography to measure the gas composition
  • Test benches for heat generator systems
    • Load, power and efficiency measurements
    • Radiation measuring station
  • Salt spray chamber
  • Tensile compression testing machine
  • Radiation chamber

The test laboratories of the DBI Group

We are at your disposal as a competent partner for testing appliances and equipment and chemical analyses. Our internationally recognized test laboratory “Prüflaboratorium Energie” for devices and fittings for gas supply and energy technology is accredited and recognized by various organizations:

  • German Accreditation Body GmbH (DAkkS)
  • Accredited test laboratory according to DIN EN ISO/IEC 17025:2018, identification no. D-PL-11072-01-00
  • Test laboratory for gas appliances within the scope of EU Regulation EU 2016/426
  • Testing laboratory for pressure equipment within the scope of EU Directive 2014/68/EU
  • German Institute for Building Technology (DIBt):
    • For the issue of general building authority test certificates (abP)
    • For the inspection of construction products before confirmation of conformity (ÜHP)
    • Notified body according to EU CPR 305/2011 for construction products, Notified Body No. 1721
    • Test body according to state building code, code number: SAC24
  • DIN CERTCO Society for Conformity Assessment mbH
    • Test laboratory for oil burners and solid fuel appliances, registration number: PL015
  • Association of Cantonal Fire Insurers VKF (Switzerland)
    • Recognition for firing units
  • Member of the Association of Materials Testing Institutes (VMPA)

We also have a chemical laboratory accredited by the DAkkS and also recognized throughout Europe, which tests gas technology measuring devices in addition to chemical analyses of gas:

  • German Accreditation Body GmbH (DAkkS)
    • Accredited test laboratory according to DIN EN ISO/IEC 17025:2018, identification no. D-PL-14614-01-00

All accreditations can also be found in the database of accredited bodies.

Our test seals

H2ready is intended to meet the wishes of numerous manufacturers of gas supply and energy technology products to identify the special properties of their products: their suitability for the use, storage or transportation of hydrogen or hydrogen-natural gas mixtures, despite the lack of standards.

The DBI test mark is a mark for an individual product in the sense of a successful test of a product in accordance with applicable standards and generally applicable guidelines or also in accordance with manufacturer specifications. It consists of three parts: the mark in electronic form, the original test mark certificate and the publication in the DBI test mark register.

Special tests

We not only carry out reliability tests (stress tests), but also tests under extreme conditions (temperature, pressure, etc.) for you over a longer period of time. For example, we are able to simulate temperatures between -35 °C and +60 °C with a relative humidity of up to 100 % using our climate cell.

The inspection of gas application systems, i.e. the evaluation of process sequences and the identification of potential savings, is also an important area of work, whereby functional safety, suitability for use and cost-effectiveness can be determined.

We support you in carrying out field tests, but also in the supervision and control of prototypes.

We also carry out external and internal monitoring of your series production devices.

Stress test stand

Salt spray test according to DIN EN ISO 9227

In the field of environmental simulation, the salt spray test method in accordance with DIN EN ISO 9227 provides information on the adequate protection of components against corrosion.

Salt spray tests prove to be very useful when products are used in corrosive environments, such as near the sea or on the high seas. Salt spray testing has also become a standard test in the automotive sector.

In our test laboratory, you have the opportunity to test the corrosion resistance of coated and uncoated components.


The salt spray test is suitable as a comparative test method, regardless of whether the quality of a metal material is maintained with or without applied corrosion protection. It is also used for quality control if samples with the same type of coating are tested.

Scope of testing

The test specimens are stored in the salty mist atmosphere for a specially defined test period. During the salt spray test in accordance with DIN EN ISO 9227, the test chamber temperature is a constant 35°C. A sodium chloride solution with a concentration of 5% is sprayed in at a constant air flow rate and a constant pH value between 6.5 and 7.2. After the test, the samples are visually inspected for the formation of deposits.

Technical data of the salt spray chamber
  • Dimensions (all dimensions in mm): L=1080, W=680, H=1000
  • Chamber volume up to 735 liters
  • Temperature range 0 to 55°C
  • Spray medium: neutral 5% saline solution

Testing of building products

  • According to EU Regulation 305/2011
  • Area code 27: Space heating systems
  • Area code 28: Pipes, tanks and accessories not connected to drinking water

Information on the CE marking of construction products can be found in the following link to the CPR. In addition, a video clip on CE marking was published by the European Commission in 04/2014.


To support your quality management, we offer you the performance of factory calibrations and customer-specific tests of measuring devices. Due to the growing demand for calibration options, we regularly expand our calibration equipment. We are currently able to carry out the following factory calibrations:


Gemeinsam mit der DBI-Gruppe wachsen. Unterstützen Sie das DVGW-Prüflaboratorium Energie als:


Student Assistant (m/f/d)

Your contact to us

Head of Department

Ronald Aßmann

(+49) 3731 – 41 95 311
(+49) 3731 – 41 95 309

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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