Patent ID: 8857424

Claim:
An exhaust hood, comprising: a housing comprising an air inlet chamber and a main chamber, wherein the air inlet chamber and the main chamber are connected by a passage, wherein the main chamber defines a collection region comprising an entry portion and an upper portion disposed above the entry portion, wherein the entry portion and the upper portion are in spatially continuous, unimpeded fluid communication with one another; an exhaust inlet coupled with the housing and configured to draw air directly from both the entry portion and the upper portion; and a supply assembly disposed in the passage, and configured to output a flow of supply air from the air inlet chamber, the supply assembly configured to direct a first portion of the supply air from the air inlet chamber into the main chamber across the collection region generally towards the exhaust inlet, and direct a second portion of the supply air from the air inlet chamber generally downward away from the collection region, the supply assembly configured to direct the first portion substantially along a straight line to thereby define an air stream, wherein the air stream divides the collection region into the entry and upper portions, the supply assembly adjustable to vary the portion of the supply air directed into at least one of the first portion or the second portion; the supply assembly further being configured to direct the first portion of the supply air such that, when exhaust is present in the upper portion, the exhaust circulates within the upper portion, and the air stream redirects the circulating exhaust within the upper portion towards the exhaust inlet.