Comfort Flame"s 30 Degree Offset and Return is designed for use with Comfort Flame and FMI wood burning fireplaces. Constructed of durable galvanized steel, this set includes the offset elbow and return and can be installed anywhere in the system. All Direct Vent and Wood Burning products require venting to the outside of the home to achieve proper ventilation and firebox combustion. FMI Products offers a full assortment of venting components to properly vent the Direct Vent or Wood Burning fireplace.