The Quadrafire Expedition II Wood Insert provides a great value for those looking for a wood insert that is easy to operate. Powered by the Quadrafire four-point burn system, this insert provides an impressive fire that can be easily seen through the large 275 sq.in. cast iron glass door. It also features Automatic Combustion Control, which gives you more air when you want it for easier start up or that extra boost of heat when needed. This is done automatically once you set the ACC so there is no need to stick around and tend the fire.