wichita.edu
…be problematic in poorly ventilated areas. Therefore, areas where plastics, reactive metals and toxic support materials are used must be well ventilated. A minimum of 4 air exchanges/hour is required to prevent occupant irritation and the risk of fire or explosion; however, an increased air exchange rate may be necessary depending on the number of…
https://www.wichita.edu/services/environmental_health_and_safety/3d_print_safety.php