A zero clearance fireplace insert is a type of fireplace insert that is designed to be installed into a preexisting firebox without the need for any additional clearance. This type of fireplace insert is often chosen by homeowners who want to upgrade their existing fireplace without having to go through the hassle and expense of having their chimney reconstructed. A zero clearance fireplace insert can also be a good option for homeowners who live in an apartment or condo and are not allowed to have a traditional wood-burning fireplace.

A zero clearance fireplace insert is a gas or wood burning fireplace insert that is designed to be installed into an existing open fireplace. This type of insert has a number of advantages over a traditional open fireplace. First, because the insert is designed to fit into an existing opening, there is no need for a custom built mantel. Second, because the insert sits inside the fireplace opening, it provides a more efficient heat transfer than an open fireplace. Third, many models of zero clearance inserts are approved for use in manufactured homes.