The European Test Center for Residential Ventilation Units (TZWL) e. V., which has moved to a modern test location in Schwerte this year, published the new eBulletin 24.1 in March.
In the eBulletin, the list of domestic ventilation units with and without heat recovery, the TZWL lists officially tested domestic ventilation units that have been approved by the DIBt and certified in accordance with PHI. The applicable test standards for the listing are the DIBt guidelines LüA 21 and LüA 22, but also the European test standards EN 13141-7 (for central devices) and EN 13141-8 (for decentralized devices) and the test principles published by the Passive House Institute Darmstadt.
The eBulletin has been used by specialist planners and end customers for over 20 years to compare the technical equipment and test indicators of domestic ventilation units. The latest version 24.1 is available to download free of charge from the TZWL website (in German): https://tzwl.de/infoportal-wohnungslueftung/ebulletin/