# US 10,480,823 B2 · Multi-burner head assembly > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,480,823 B2 - Document ID: US10480823B2 - Status: Granted - Kind: B2 - Application number: 14/079,826 - Filed: 2013-11-14 - Published: 2015-05-14 - Granted: 2019-11-19 - Earliest claimed: 2013-11-14 - Assignees: Lennox Industries Inc. - Applicants: Lennox Industries Inc. - Inventors: Shiblee Noman; Ian Burmania - Web page: https://patentgrep.com/patent/US10480823B2 ## CPC - F24H 9/1881: using fluid fuel - F23D 14/04: induction type, e.g. Bunsen burner - F24D 5/02: operating with discharge of hot air into the space or area to be heated - F24H 3/065: {using fluid fuel} - F27D 99/0033: {using burners} - F24H: FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL (steam generation F22) - F23D: BURNERS - F24D: DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR (using steam or condensate extracted or exhausted from steam engine plants for heating purposes F01K17/02) - F27D: DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE ## Abstract In various implementations, a multi-burner head assembly may include a venturi inlet coupled to burner heads. The multi-burner head assembly may allow control of the flame profile generated by the assembly. For example, burner heads of the multi-burner head assembly may include different characteristics, such as height. ## Claims ### Claim 1 A multi-burner head assembly comprising: a mixing body operable to mix air and gas; a venturi inlet coupled to the mixing body and configured to receive air and gas; a plurality of burner heads coupled to the mixing body and comprising a single row, wherein the burner heads comprise a first burner head comprising a first height and a second burner head comprising a second height different than the first height, and wherein the second burner head is proximate the first burner head, and a third burner head with a third height different than the first and second heights; wherein a first distance between the first and second burner head is different than a second distance between the second and third burner head; wherein the first burner head is immediately adjacent to the second burner head and the second burner head is immediately adjacent to third burner head; wherein the first burner head, second burner head, and third burner head are not coaxial; and wherein the first, second, and third heights and the first and second distances are configured to cause the first, second, and third burner heads to have a similar flame profile. ### Claim 2 (depends on 1) The multi-burner head assembly of claim 1 further comprising more than three burner heads. ### Claim 3 (depends on 2) The multi-burner head assembly of claim 2 wherein each of the burner heads comprises a different height. ### Claim 4 (depends on 2) The multi-burner head assembly of claim 2 wherein at least two of the burner heads are approximately the same height. ### Claim 5 (depends on 2) The multi-burner head assembly of claim 2 wherein at least two of the burner heads are approximately the same width. ### Claim 6 (depends on 2) The multi-burner head assembly of claim 2 wherein at least two of the burner heads comprise openings having different cross-sectional areas. ### Claim 7 A gas furnace comprising: a heat exchanger comprising: a shell through which air flows, and a tube bundle through which heat is provided to the air flow in the shell; more than one opening, wherein each opening is coupled to an inlet of a tube of the tube bundle; a multi-burner head assembly comprising; a mixing body configured to mix gas and air, a venturi inlet coupled to the mixing body, and a plurality of burner heads coupled to the mixing body by a plurality of coupling mechanisms, wherein the plurality of coupling mechanisms allow heights of the plurality of burner heads to be adjusted, wherein the plurality of coupling mechanisms comprise threaded portions on the mixing body and the plurality of burner heads, wherein at least two of the burner heads comprise openings having different cross-sectional areas; and one or more predefined clearances, wherein each predefined clearance is disposed between a burner head of the multi-burner head assembly and an opening of the heat exchanger, and wherein a first predefined clearance disposed between a first burner head and a first opening of the heat exchanger, and wherein a second predefined clearance is disposed between a second burner head and a second opening of the heat exchanger, and wherein the first predefined clearance is approximately the same as the second predefined clearance. ### Claim 8 A gas furnace comprising: a heat exchanger comprising: a shell through which air flows, and a tube bundle through which heat is provided to the air flow in the shell; more than one opening, wherein each opening is coupled to an inlet of a tube of the tube bundle; a multi-burner head assembly comprising; a mixing body configured to mix gas and air, a venturi inlet coupled to the mixing body, and a plurality of burner heads coupled to the mixing body by a plurality of coupling mechanisms, wherein the plurality of coupling mechanisms allow heights of the plurality of burner heads to be adjusted, wherein the plurality of coupling mechanisms comprise threaded portions on the mixing body and the plurality of burner heads, wherein at least two of the burner heads comprise openings having different cross-sectional areas; and one or more predefined clearances, wherein each predefined clearance is disposed between a burner head of the multi-burner head assembly and an opening of the heat exchanger, and wherein a first predefined clearance disposed between a first burner head and a first opening of the heat exchanger, and wherein a second predefined clearance is disposed between a second burner head and a second opening of the heat exchanger, and wherein the first predefined clearance is different from the second predefined clearance.