A:Answer Ductwork is not included with the LG 1.6 cu. ft. Non-Sensor Over the Range Microwave Oven, Model # LMV1683. If you need to vent it outside, you will need to purchase the ductwork if you do not have it. The microwave can be vented in one of three ways, Roof-Venting, Wall-Venting or Room-Venting. The microwave is shipped with its blower assembled for room-venting. If you want to wall-vent or roof-vent, you will need to adjust the blower. The instruction manual for the different types of installation is included with the unit...^IFV