Even a smaller fireplace can be significant source of wood heat, and you don’t have to sacrifice contemporary design or the comfort of a fire in the hearth. The Neo 1.6 insert, for existing masonry fireplaces, is a solid, woodburning insert built of heavy-gauge steel with a cast iron door. With advanced heat exchange technology and a secondary combustion baffle, the Neo 1.6 insert delivers exceptionally clean-burning, energy-efficient heating performance… in a flush profile with a large, clear glass window that reveals the flame inside.