It is time for some engineering fundamentals in the show. This time in the fire fundamentals series we delve into the details of natural and powered smoke ventilators - what they are, how they work, how they are tested and what interesting mechanics impact their performance in fire. I hope this episode is valuable for all engineers who would love to know how the devices they place in their design are tested and qualified for use in fire safety. It should also be a great way for fire scientists to broaden their horizons and learn about very intricate details of natural and powered vents, which you learn only through experience in the design. If you enjoyed this episode, you may want to jump into: Episode 50 - Wind, fire and a surpriseEpisode 47 - Effective pressurization with Grzegorz SypekSome of the papers advertised in the episode: Aerodynamic study of a city and its impact on the smoke control systemInfluence of wind on the performance of natural ventsRoof obstacles and the performance of natural ventsSmart smoke control concept paper (a more approachable one :))Smart smoke control concept paper (a more technical one :))Smart smoke control implementation paperFire Science Show podcast is produced in partnership with OFR Consultants