A printhead is provided having a plurality of nozzles and a plurality of heater elements each for heating an ejectable liquid to cause ejection of a drop of the ejectable liquid from a respective one of the nozzles. Each heater element is configured such that the energy required to be applied thereto to cause ejection of the drop is less than the energy required to heat a volume of the ejectable liquid equal to the volume of the drop to a temperature less than 40 degrees Celsius above ambient temperature.