Abstract: A single burn rate woodstove provides primary combustion air and secondary combustion air to a combustion chamber of the woodstove. The woodstove includes a primary air inlet, a primary air outlet into the combustion chamber, and a secondary air outlet into the combustion chamber. Some embodiments of the inventions include secondary air inlet(s) for the secondary combustion air separate from the primary air inlet. Some embodiments of the invention include the same firebox sizes as known in the prior art while providing such inexpensive single burn rate woodstoves with improved emissions performance by using both primary and secondary combustion air.

Abstract: A biomass pellet combustion system includes a primary burn chamber, a coal burn chamber, and a gas burn chamber. The primary burn chamber is configured to receive pellets from a drop tube of the biomass pellet combustion system. The coal burn chamber is configured to receive coals from the primary burn chamber. The gas burn chamber is configured to receive combustible gases from both the primary burn chamber and the coal burn chamber, wherein a secondary combustion process converts secondary combustion air and the combustible gases into exhaust gases in the gas burn chamber.

Abstract: A grill includes a cooking surface. The cooking surface includes at least one grate. The grate has internal heating elements operable to raise the temperature of the great above the temperature achievable via a heat source of the grill. The grate may be referred to as a searing station. In one embodiment, the grill is a wood pellet grill, the heat source is burning wood pellets in a burnpot of the grill, and the heating elements are resistive heating elements fully contained within slats of the grate. A searing station is especially suited for wood pellet grills which operate at lower temperatures than conventional gas or charcoal grills because it combines the slow cooking characteristics of a pellet grill with the quick searing capabilities of an infrared gas grill. The searing station may, however, be used in any type of grill.

Abstract: A wood pellet stove operable to mount to a wall includes a combustion chamber, a combustion chamber door, and a hopper. The combustion chamber has a front, back, and side. The combustion chamber door is in the front of the combustion chamber. The hopper is mounted at the side of the combustion chamber. The bottom of the hopper is below a top of the combustion chamber, and a top of the hopper is substantially coplanar with the top of the combustion chamber. The stove may also include a sight glass or fuel level monitoring system for determining a fuel level of the hopper without opening the hopper.

Abstract: The present disclosure provides woodstoves that, optionally, produce low emissions. In certain embodiments, the woodstove includes a housing, a firebox disposed in the housing, an air regulator and a secondary air pipe. The air regulator includes a primary air aperture configured to supply primary air to a fire located in the firebox, a plurality of secondary air apertures configured to supply secondary air to a combustible gas emitted by the fire, and a secondary air damper. The present disclosure also provides methods of operating such a woodstove. As measured according to Method 28 of the U.S. Environmental Protection Agency, the weighted average emission rate of the woodstove of certain embodiments of the invention is no greater than about 4.5 grams of particulate emissions per hour.

Abstract: The invention relates to heating units mounted on a window of an existing building. Flue gases are expelled outside of the building without the need for wall modifications or an extra chimney. The actual burn chamber is mounted on a window mounting unit with an interior support which extends into the building thereby heating the air inside the building.

Abstract: A fireplace cover including a substantially rectangular flat sheet member of slightly greater width and height than the fireplace opening for overlapping and covering the same, a pair of one-piece foot members, each having a vertical leg mouned on the sheet member and fixed to a foot extending front-to-rear beneath and supporting the sheet member.The fireplace cover is further characterized by a substantially U-shaped, anti-torsion, reinforcing member fixed to the rear surface of the sheet member extending substantially parallel to the top and side edges of the sheet member, but spaced uniformly from the corresponding edges to provide sufficient marginal areas to overlap the margins of fireplace openings of different sizes.