Скачать или смотреть Fire Attack: Door Open vs Door Closed

This video demonstrates the use of the door to control the air intake to reduce thermal insult to fire personnel and better control the fire. When you watch this video observe the area inside the door and above the attack position. The fire attack was done with a low expansion foam tube flowing 20 gpm of 0.40% Novacool solution through a 1" attack line.
When the door is open the fire continues to grow as the amount of air flowing into the room allows the fire to overcome the 20 gpm Novacool solution stream. The thermal insult to the firefighter is great during this attempt to control the fire.
When the door is totally closed there is no visible fire in the attic area. The lack of an air intake greatly slows the fire spread in the attic. When the door is cracked the fire in the attic becomes visible and grows.
The nozzle is placed into the opening of the cracked door flowing towards the bottom of the room. The fire attack with the door cracked allows the 20 gpm Novacool solution stream to overcome the fire and nearly eliminate the thermal insult to the firefighter.