Certified Quality!


DQS – ISO 9001 : 2015

Our company is ISO 9001 certified.

This qualifies our product and service quality in all process- and project-relevant processes.

For us it is indispensable always be up-to-date in the development and technology and to realize and live a continuous improvement process.

ISO 9001 Deutsch
ISO 9001 Englisch
AEO Logo

AEO – Authorized Economic Operator

Since 2011 we have been certified by customs as an AEO Authorized Economic Operator.

This authorization is an essential element of the EU security concept. It allows us a secure and reliable export declaration to the EU countries, as well as the third countries listed in the customs agreements: Switzerland, Norway, USA, Japan and China. An agreement with Canada is in the negotiations and expected to be signed in April 2017.

Thielmann Energietechnik GmbH has obtained the AEOC status.
You can find detailed information on the AEO certification at www.zoll.de


DVGW-Certificates for Cellular Gas Filters for placing on the market and provision in the EU economic area

The type examination carried out by the ‘DVGW CERT GmbH Certification Body’ for our cellular gas filters based on the test basis 2014/68/EU A III B and based on DIN 3386: 2012-10.

acc. to Pressure Equipment Directive EC 2014/68/EU
for pressure equipment p> 0.5 bar

The type examination in accordance with the EC Pressure Equipment Directive serves to place our cellular gas filters in the European Economic Area on the market for the use of pressure equipment with a max. permissible pressure p> 0.5 bar

acc. to EU Gas Appliance Regulation EU 2016/426 (GAR)
on appliances for the combustion of gaseous fuels:

The type examination according to the EU Gas Appliance Ordinance serves for placing our cellular gas filters in the European Economic Area on the market for the use of devices for the combustion of gaseous fuels.