The Close Your Door safety initiative comes as the result of over 10 years of research by the Underwriters’ Laboratories (UL) Firefighter Safety Research Institute (FSRI). After proving that a Closed Door could potentially save lives in a fire, UL FSRI has committed to share this finding with the world.
FSRI analyzed the effect of doors and windows on a fire’s spread. Bedrooms on the first and second floor of a home were tested during the scenario.
Using hundreds of temperature sensors, researchers found that Closed-Door rooms on both floors during the fire’s spread had average temperatures of less than 100 degrees Fahrenheit versus 1000+ degrees in the open-door rooms. “You could see a markable difference that a person could be alive in a room with a closed door much longer,”
Gas concentrations were markedly different as well. The open-door bedroom measured an extremely toxic 10,000 PPM CO (parts per million of Carbon Monoxide), while the Closed Door had approximately 100 PPM CO. Exposure to CO at a concentration of 400 ppm will cause headaches in 1 to 2 hours; in 3 to 5 hours the same concentration can lead to unconsciousness and death. 1,200 ppm is considered Immediately Dangerous to Life or Health (IDLH)