**Unused Returned item.. Manufactured in 2021**

This Vent-Free Burner includes an Oxygen Depletion System to quickly shut off the gas if room oxygen levels drop to unsafe levels. Although this vent free burner can also be used in a vented installation, some modifications are necessary. Vented/Vent-Free* burners convert to Vented by blocking open the fireplace damper. In a vented installation, this burner can only be used as a decorative appliance. All White Mountain Hearth burners include a standing pilot for instant starts. All you need is the log set. So toss out the matches, turn on the valve and curl up by the warm fire for a comfy night at home! The Slope Glaze Burner features concealed controls and include a standing pilot for instant starts. This burner includes a millivolt valve and features ON/OFF operation. It can be controlled manually or by remote or wall switch (sold separately). There is no flame control or temperature adjustment with this burner. You have the option of using a thermostat, a remote or a combination thermostat and remote. It DOES NOT include a remote or a thermostat. Vented/Vent Free Approved for use in any certified vent-free firebox May be installed in an existing wood-burning fireplace, with the damper closed, to operate as a vent-free heating system