This morning at 10:30 the alarm went out for a residential Chimney Fire on Route 119 in Crabtree.  Engine 34 with a crew of 5 arrived to find a 2- story duplex with a small fire in an exterior chimney on an add-on portion of the house.  The Engine sent a crew to the roof and a crew interior to begin suppression, ventilation and checking for extension.  The fire was quickly extinguished and no extension was found.  Mutual aid companies staged and assisted with overhaul.  Crews out 30 mins.