The term “zero clearance” is often used to describe any factory-built, metal-framed fireplace.  These are designed to be installed within standard construction, without special footings or supports.  Our gas, wood-burning, and pellet-burning fireplaces are considered zero-clearance.  They can permit a “clearance” (required distance) to combustible framing (such as wood studs or plywood floors) as low as zero inches.  Some may require a metal plate below the bottom frame, or framing to clear metal “standoffs” (spacers).  What does the fireplace term zero clearance mean? Zero clearance simply means “0” inches are required between the fireplace and combustible materials. Therefore, framing dimensions are dramatically minimized – allowing the unit to be placed right up against interior or exterior walls. Because there are no restrictions on clearance requirements needed around the unit itself, the unit can be placed right up to an interior or exterior wall for a tight fit. However, we do recommend a 1/4″ space for expansion space. (When metal heats, it will expand.)