What is an unvented hearth product?
Unvented, or more correctly, “room vented” products are designed to operate with all the gases and other by-products of the burning process coming into the room. They use an ODS or Oxygen Depletion Sensor which may act as a safety shutoff should the unit not operate properly. In addition, several manufacturers of unvented hearth products also include a carbon monoxide detector as part of the system.