The Type AC atomized #2 fuel oil and combination gas/#2 fuel oil burners from Power Flame Incorporated (Parsons, KA) are rated from 23.5 gph to 136.4 gph on light oil and from 328 MBtuh to 19,100 MBtuh on gaseous fuels. They are capable of an 8:1 turndown ratio on oil and a 10:1 turndown ratio on gas. The burner's flame retention firing head incorporates a single nozzle air atomizing assembly for liquid fuels and a nozzle mix, multiport combustor for gaseous fuels.