This is a BRAND NEW Trane/American Standard gas furnace burner. This unit works with MANY furnaces. It is 5" long, 1 3/8" wide at the gas inlet end and 3" wide at the gas exit end. The Part # is BRN01078. The model that you have determines the number of burners you have (between 3 and 6 per furnace). Thanks for looking and good luck! Part number: 5186620 is a Patent number that is used on several other burners as well. Be sure that the dimensions on your current burner match this listing and there is a chance that this is not compatible with your unit. If you would like to verify that this is a compatible replacement, feel free to send us an e-mail!
Burners are designed to mix the correct amount of air and gas for proper and clean combustion. The gas is regulated at the gas valve and many burners have air adjustments on them. Newer style burner called in-shot burners do not have air adjustments.