| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 126523000 | With heat exchanger for room heating air | 8 |
| 20090151711 | FIREPLACE WITH EXHAUST HEAT EXCHANGER - A heat exchanger system and method for transferring heat from exhaust air from a fireplace to air to be delivered to a living space is described. Heated exhaust air is passed through a heat exchanger before exhaustion from the structure. The heat exchanger couples the exhaust duct and the intake duct and transfers otherwise unused heat from the waste products to the outside air to increase the overall efficiency of the heated product source. | 06-18-2009 |
| 20110162636 | COOL TOUCH FIREPLACE - A fireplace including a body, a heating unit within the body, a duct within the body and in communication with the heating unit, an opening defined by a terminal end of the duct, an insert attached to the terminal end of the duct and arranged to dispel a heated air, and wherein the insert remains at a lower temperature than the duct during a heating operation. | 07-07-2011 |
| 20130092150 | SECONDARY ROOM AIR HEAT EXCHANGER - Heating a room in a structure with a fireplace includes feeding combustible gas to a burner of a combustion assembly of the fireplace to create heat and flames with hot exhaust air passing out of a combustion chamber of the fireplace through an exhaust duct and into an exhaust air conduit of a secondary heat exchanger and out of the structure. | 04-18-2013 |
| 20130206133 | X-VENT - A fireplace apparatus for a building includes a firebox, and a plenum arranged with an exterior surface of the firebox. A blower is arranged with the plenum to force air through the plenum and a plenum exhaust vent is configured to release the forced air from the plenum. A method of pre-heating air for a building fireplace includes selecting air admitted from inside the building through an interior inlet port into a manifold and through a plenum until the firebox reaches a selected temperature, and selecting air admitted from outside the building through an exterior inlet port into the manifold and through the plenum when the firebox reaches or exceeds the selected temperature. | 08-15-2013 |
| 126524000 | Tubular | 2 |
| 20090211565 | Fireplace firewood retainer assembly with air deflector, fireplace incorporating the same and method of reducing particulate emissions in a wood burning fireplace - A firewood retainer assembly and a fireplace incorporating the same are provided. The assembly includes a grate for supporting firewood at a level above a floor of a fireplace combustion chamber. The grate includes a first end opposite a second end such that a width of said grate is defined between these ends. The assembly also includes a deflector positioned adjacent the grate for deflecting air entering said combustion chamber below the level. A method of burning firewood is also provided which results in reduced particulate emissions. The method requires the deflection of air used for combustion below the firewood, heating the air with embers located below the firewood, and using the heated air for combustion. | 08-27-2009 |
| 126525000 | Secondary outlet leads air to flame | 1 |
| 20150308691 | DEVICE FOR IMPROVING COMBUSTION IN A FIREPLACE - The invention relates to a device approximately defining an L shape and comprising at least two first nested pipes in the foot of the L ( | 10-29-2015 |
| 126531000 | Hollow side walls in heat exchanger | 1 |
| 20130213386 | FIREPLACE - A fireplace is provided that includes a combustion space delimited by a combustion-space lining and accessible through a door or flap. The combustion-space lining is at least partially composed of a ceramic or glass-ceramic material. The fireplace also includes a wall element disposed on a side of the combustion-space lining that faces away from the combustion space so that so that an intermediate space is formed between the side and the wall element. A heat exchanger or insulating material can be positioned in the intermediate space. | 08-22-2013 |
| 126533000 | With air flow regulator | 1 |
| 20100037886 | FIREPLACE WITH ELECTROSTATICALLY ASSISTED HEAT TRANSFER AND METHOD OF ASSISTING HEAT TRANSFER IN COMBUSTION POWERED HEATING DEVICES - An apparatus enhances the efficiency of a combustion heating device such as a fireplace by incorporating an ionic gas propulsion mechanism (e.g., a corona discharge device) to transport ambient air through a heat exchanger. A heat exchanger is configured to warm the ambient air using both heat energy produced by the combustion process and/or by byproducts of the combustion, e.g., exhaust gases. Air scrubber functions collect particulates present in the air including combustion byproducts such as ash and soot. An audio modulator may be used to vary the high voltage applied to electrodes of the corona discharge electrodes to vary air velocity in response to an audio or similar control signal to induce a vibratory motion to the air, i.e., sound, in forms such as music or simulated natural noise, and/or to cancel or attenuate undesirable sounds and noises, such as chimney sounds. | 02-18-2010 |
