Zero clearance fireplaces are used where there is no existing fireplace. Also referred to as factory-built fireplaces, they must be framed in and finished. These fireplaces are available in both wood and gas.
Inserts are used to convert existing wood-burning masonry fireplaces to either wood or gas. A stainless-steel liner is used for wood inserts. Two aluminum liners are used for gas inserts to line the existing chimney.