The present disclosure encompasses methods and systems for decontaminating polluted gas using heated volcanic rock.

A dual-fuel fireplace apparatus is described. In one example, an apparatus includes an enclosure having a door disposed thereon and a wood-burning compartment disposed within the enclosure. The wood-burning compartment has an insulated housing configured to support temperatures associated with burning of wood within the wood-burning compartment. A gas-burning compartment is also disposed within the enclosure and has a gas burner disposed therein. A mechanism including a motor is configured to cause movement between a first mode in which the wood-burning compartment is viewable through the door and a second mode in which the gas-burning compartment is viewable through the door.

A table has a table top containing an opening. A heating appliance is in the opening wherein the heating appliance extends at least beneath the table top. The table top opening comprises a recess in which the heating appliance is received, and the recess has at least one wall below the table top. The heating appliance has a substantially sealed chamber for receiving combustible fuel with which the heating appliance is used, and the chamber has at least one window.

A mechanism for raising and lowering a cooking surface within a recessed combustion chamber is provided.

A mechanism for raising and lowering a cooking surface within a recessed combustion chamber is provided.

A mechanism for raising and lowering a cooking surface within a recessed combustion chamber is provided.

A table (1) has a table top (2) containing an opening (3). A heating appliance (10) is in the opening (3) wherein the heating appliance (10) extends at least beneath the table top (2). The table top opening (3) comprises a recess (5) in which the heating appliance (10) is received, and the recess (5) has at least one wall (7) below the table top (2). The heating appliance (10) has a substantially sealed chamber (13) for receiving combustible fuel (47) with which the heating appliance (10) is used, and the chamber (13) has at least one window (35, 45).

A non-bypassable catalyst assisted appliance includes, for example, a housing having a combustion chamber, a loading door, an air inlet opening, and an exit opening connectable to a flue. A platform defines a non-movable separation in the housing between the combustion chamber and the exit opening. An insulated catalyst combustor is disposed between a top wall of the housing and the platform. When the door of the appliance is closed, gas from the combustion chamber is exhausted and directed along a single flow path horizontally through the insulated catalytic combustor and into the flue. When the door of the appliance is open, gas from the combustion chamber is inhibited from passing through the loading door opening, and ambient air entering the loading door opening and combustion gas from the combustion chamber are exhausted and directed along a single flow path horizontally through the insulated catalytic combustor and into the flue.

A dual-fuel fireplace apparatus is described. In one example, an apparatus includes an enclosure having a door disposed thereon and a wood burning compartment disposed within the enclosure. The wood burning compartment has an insulated housing configured to support temperatures associated with burning of wood within the wood burning compartment. A gas burning compartment is also disposed within the enclosure and has a gas burner disposed therein. A mechanism including a motor is configured to cause movement between a first mode in which the wood burning compartment is viewable through the door and a second mode in which the gas burning compartment is viewable through the door.

A mechanism for raising and lowering a cooking surface within a recessed combustion chamber is provided.