With literally hundreds of trims, surrounds and accessory options available, Direct Vent fireplaces will compliment any room décor. These fireplaces are designed to vent directly out of an exterior wall or through the roof. Their sealed double pipe venting system makes them very efficient heating units with outside air coming through the outside layer of vent pipe directly into the firebox for combustion and waste gases exiting through the inner pipe. Many come with the same features as the efficient inserts. Direct vent fireplaces are usually zero clearance, which means that they can be installed with little or no clearance to combustible materials: framing may be applied directly against the unit. One of the main selling features of this type of fireplace is their ability to be installed in almost any room of the house.