A modular heat exchange system is provided. The modular heat exchange system includes an air inlet assembly, a plenum assembly, and a heat exchange assembly including at least one heat exchange module. The at least one heat exchange module includes at least one fill module. The at least one fill module includes a plurality of fill sheets arranged on at least one support member. The at least one support member includes a first end and a second end. A plurality of fill packs is also provided on the at least one support member. Each fill pack includes a plurality of bonded fill sheets. A first fill pack is coupled to the first end of the at least one support member and a second fill pack is coupled to the second end of the at least one support member.