Vent free fireplace create fires that emit fewer fumes than traditional gas fireplaces and do not require a chimney or other form of ventilation. Today’s vent free fireplaces have oxygen-detection safety pilot lights on them that do not light if air conditions in the room are unsafe to operate the fireplace. If the levels of carbon monoxide get too high, the vent-free fireplace shuts itself off. You can use a vent-free fireplace to provide heat in any room in your home. Vent-free fireplaces provide heat by burning natural gas or propane rather than wood. There are several vent free fireplace indoor design. To choose from among the different vent free fireplace indoor design, a homeowner should consider how he will primarily use it. Each has a rating for how much energy they consume and how much heat, measured in BTUs, they provide.