Vacant House Fires. What is a Vacant? When do you SEARCH? Posted on January 1, 2012 by countyfiretactics Vacant or Occupied? Offensive or Deffensive? You tell me. Knock Down achieved in under two minutes. Yes small house, but they too require us to extinguish. Working fire with a total of 12 Firefighters. What do you do? How long will the stretch be? Will your pre-connects reach or do you need to add a roll/section?