The Charlottesville Fire Department responded to a vacant house fire under construction in the 700 block of Franklin Street. Units received the call at 3:37 am. First arriving units made it on scene minutes later and found a window air conditioning unit on fire. The fire was quickly extinguished and companies were put in service 18 minutes later. One engine company and the fire marshall remained on scene for investigation. Four engine companies, two aerial units, one medic unit and a battalion chief were assigned to the call for service.