This is the most efficient design, in the sense that it demands minimum energy on the cooling tower fan power. Broadly, it is the most competitive, cost effective and popular design solution for the HVAC industry. It has the maximum force per unit area for the air in contact with the water droplets falling down the cooling tower, thereby deeming it the least in terms of fan energy consumption. It also has the characteristic tendency to be ‘Tall & Thin’ in dimensions – that is, it has the minimum length and width area with more height, compared to the Induced Draught Crossflow design counterpart, which may be considered ‘Short & Fat’ – meaning, it has more length and width area but a shorter overall tower height. The reason for this is that the heat transfer in the counterflow design moves vertically, whereas the transfer is happening horizontally in the crossflow design.