A case study investigating ventilation solutions and strategies for gas extraction in Li-ion battery rooms in six buildings has been conducted. The findings reveal significant variability in the choice made for gas venting and explosion prevention. None of the case buildings complied fully with established international guidelines. Decisions related to active fire safety measures appear to be driven more by compliance with building regulations and compensating for other safety issues than focusing specifically on the battery room. The varying amount of active fire safety measures implemented indicate that the experience and knowledge of the designers and other stakeholders involved in the process, and what is emphasised in the design phase, is of great importance when there are no guidelines present.