What is a vent-free or ventless gas fireplace?

A vent-free (or ventless) gas fireplace is a heating appliance designed to burn gas efficiently enough to release heat directly into your room without needing a chimney or vent. These units use indoor air for combustion and are engineered to produce minimal exhaust. While they are easy to install and excellent for zone heating, proper ventilation and compliance with local building codes are crucial for safe use.