Place a vape detector near vents

https://markets.businessinsider.com/news/stocks/zeptive-software-update-boosts-vape-detection-performance-and-adds-new-features-free-update-for-all-customers-with-zeptive-s-custom-communications-module-1035951542

Location a vape detector near vents and mirrors to catch aerosol plumes that might otherwise distribute rapidly in busy bathrooms or corridors.