Vaporizer output curves at 1, 2, 4, and 8% settings. Air flow was set at 4 l/min for all settings. Measurements were taken at 15 s, 30 s, 45 s, 1 min, 2 min, 3 min, 4 min, 5 min, 10 min, 15 min, 20 min, 25 min, and 30 min. Maximum output is reached at ~10 min.