Following a fire, SERVPRO of Longview pays careful attention to the HVAC system and duct-work to prevent the spread of soot and to eradicate a potential source of lingering smoke odor. If the system was operational at the time the fire occurred, chances are good that the system helped to circulate the soot and smoke throughout the structure. Experience has shown that the duct-work system, including the air registers and HVAC units, should be thoroughly cleaned to prevent continued circulation of soot and odor-causing particles that may have contaminated the system.