A droplet ejection apparatus, such as an inkjet printhead, having improved productivity that includes: an array of elongate fluid chambers (2), with each chamber communicating with a nozzle (6), the array extending in an array direction; a common fluid inlet manifold (4); a common fluid outlet manifold (5); and a fluid supply that generates a through-flow of fluid from the common fluid inlet manifold, through each chamber in the array and into the common fluid outlet manifold; the two walls defining each chamber are formed from piezoelectric material so as to effect droplet ejection from the nozzle; this ejection flow occurs simultaneously with the through flow, which may have a larger value than the maximum ejection flow; each nozzle may be elongate parallel to the length of its chamber and/or may have an outlet with an area conferring advantages in terms of productivity and temperature control.