Hi there.. Yesterday we had a structure fire at my workplace. It was not the first time. The building in question was completely closed up, and we had a hard time getting inside to put the fire out ourselves before emergency services arrived. By the time we were making progress breaking into the building, the fire had grown so large that we were afraid to breach an entry and we decided to pull back and wait for the professionals. Question is, where is the line drawn between when you break a window to get in and when do you leave it alone for fear that a fresh supply of air would make matters worse? On our arrival with fire extinguishers and a garden hose - the fire was limited to only a few square feet. By the time we were almost inside and decided to quit, the fire was maybe 400 sq feet on the floor and was climbing the walls. Keep in mind, I have no fire education other than what I see on T.V. and T.V. says that a large fire will rush towards the new source of oxygen. So where is the line?