This report is the very first version of the document that will present the THyGA short-term test. These tests are carried out to observe how appliances react in the short term (few minutes to few hours) on different H2NG mixtures and long-term test are observing behaviour over several weeks.

The analysis is based on the test of about 20 appliances only and is not yet covering extensively all the segments of the project. However, most of the aspects of the testing are included in the present version that shall be considered as a draft working document to prepare the final report. We have tried to incorporate all aspects that are important to us, but there may be more aspects and more analyses that could be added and will be added in the light of the comments and corrections we will gather after the dissemination of the document.

This document was the basis for the December 2021 Workshop on interim test results