What is the difference between a masonry and zero-clearance fireplace?
A masonry fireplace is a factory-built, metal firebox that uses a masonry block chamber to circulate the heated room air. A zero-clearance firebox has an insulated metal jacket around the inner firebox that enables the unit to be placed right up against interior or exterior walls with “0” inches between the fireplace and combustibles. Heated room air is circulated within the fireplace system itself.
