The Y160 boiler variant used on the Batch 3 "Leander"s (such as ) also incorporated steam atomisation equipment on the fuel supply so the diesel fuel entering the boilers "via" the three main burners was atomised into a fine spray for better flame efficiency. Some ships with Y100 Boilers were also converted to steam atomisation, HMS "Cleopatra" being one of them. The superheat temperature of the Y160 was controlled manually by the boiler room petty officer of the watch between and the steam supplied to the main turbines was at a pressure of . The "Leander"-class frigates did have Babcock & Wilcox boilers but of a more conventional two-drum design, one water drum and one steam drum, much like a Yarrow boiler without the second water drum. The water drum was offset to one side and below the furnace and steam drum. The two boilers fitted were 'handed' with the water drum inboard on both. Many "Leander"s had six-burner furnaces (known as Five and a Half Boilers) and the output was varied by altering the number of burners in use.