Vented gas fireplaces (not including direct vent) may be installed in bathrooms and sleeping rooms provided that:
1. The fireplace is listed.
2. The habitable room is an unconfined space.
3. The fireplace is installed in accordance with manufacturers' instructions.
4. An approved carbon monoxide detector is installed inside the bathroom or sleeping room and is energized by the permanent electrical wiring present inside the bathroom or sleeping room.