What is a vent-free or ventless gas heating stove?

A vent-free (or ventless) gas heating stove is a self-contained unit that burns gas efficiently enough to release heat directly into the room without the need for a chimney or vent. These stoves use indoor air for combustion and are designed to burn fuel cleanly, producing minimal exhaust. While they offer easy installation and excellent zone heating, proper room ventilation and compliance with local codes are essential for safe operation.