The AT is an open circuit, induced draft, axial fan, counterflow cooling tower with CTI certified thermal performance. Standard construction consists of all G235 (approx 725g of zinc per m²) galvanised steel. The construction materials of the basin (everything below the top of the air inlet louvres) can be upgraded to Type 304 or 316 Stainless Steel. For full stainless steel construction refer to the USS product line.