A heat exchanger assembly, comprising: a frame comprising a plurality of frame components, including: a plurality of legs laterally spaced apart from one another, the legs being configured to support the heat exchanger assembly on a support surface; a first lower transversal member and a second lower transversal member extending generally perpendicular to the legs, the first and second lower transversal members being spaced apart from one another and interconnecting the legs to one another; a plurality of upstanding members extending upwardly from respective ones of the legs, a lower end of each of the upstanding members being connected to a corresponding one of the legs at a junction therebetween located longitudinally between the first and second lower transversal members; an upper transversal member extending laterally and interconnecting upper ends of the upstanding members; an upper frame assembly including a plurality of upper retaining members laterally spaced apart from one another, the upper retaining members being connected to the upper transversal member and extending transversally to the upper transversal member; wherein the frame components of the frame are weldlessly connected to one another, a plurality of lateral enclosing panels connected to the upstanding members and defining in part an enclosed space of the heat exchanger assembly; first and second heat exchanger panels for exchanging heat with air pulled into the heat exchanger assembly, each of the first and second heat exchanger panels extending from an upper end to a lower end and including a tubing arrangement for circulating fluid therein, the upper end of each of the first and second heat exchanger panels being connected to the upper retaining members, the first and second heat exchanger panels being disposed in a V-configuration such that a distance between the upper ends of the first and second heat exchanger panels is greater than a distance between the lower ends of the first and second heat exchanger panels; and a fan for pulling air into the enclosed space of the heat exchanger assembly via at least one of the first and second heat exchanger panels, the fan being supported by the upper frame assembly, the fan having a fan rotation axis extending generally parallel to the upstanding members. a frame comprising a plurality of frame components, including: a plurality of legs laterally spaced apart from one another, the legs being configured to support the heat exchanger assembly on a support surface; a first lower transversal member and a second lower transversal member extending generally perpendicular to the legs, the first and second lower transversal members being spaced apart from one another and interconnecting the legs to one another; a plurality of upstanding members extending upwardly from respective ones of the legs, a lower end of each of the upstanding members being connected to a corresponding one of the legs at a junction therebetween located longitudinally between the first and second lower transversal members; an upper transversal member extending laterally and interconnecting upper ends of the upstanding members; an upper frame assembly including a plurality of upper retaining members laterally spaced apart from one another, the upper retaining members being connected to the upper transversal member and extending transversally to the upper transversal member; wherein the frame components of the frame are weldlessly connected to one another, a plurality of legs laterally spaced apart from one another, the legs being configured to support the heat exchanger assembly on a support surface; a first lower transversal member and a second lower transversal member extending generally perpendicular to the legs, the first and second lower transversal members being spaced apart from one another and interconnecting the legs to one another; a plurality of upstanding members extending upwardly from respective ones of the legs, a lower end of each of the upstanding members being connected to a corresponding one of the legs at a junction therebetween located longitudinally between the first and second lower transversal members; an upper transversal member extending laterally and interconnecting upper ends of the upstanding members; an upper frame assembly including a plurality of upper retaining members laterally spaced apart from one another, the upper retaining members being connected to the upper transversal member and extending transversally to the upper transversal member; wherein the frame components of the frame are weldlessly connected to one another, a plurality of lateral enclosing panels connected to the upstanding members and defining in part an enclosed space of the heat exchanger assembly; first and second heat exchanger panels for exchanging heat with air pulled into the heat exchanger assembly, each of the first and second heat exchanger panels extending from an upper end to a lower end and including a tubing arrangement for circulating fluid therein, the upper end of each of the first and second heat exchanger panels being connected to the upper retaining members, the first and second heat exchanger panels being disposed in a V-configuration such that a distance between the upper ends of the first and second heat exchanger panels is greater than a distance between the lower ends of the first and second heat exchanger panels; and a fan for pulling air into the enclosed space of the heat exchanger assembly via at least one of the first and second heat exchanger panels, the fan being supported by the upper frame assembly, the fan having a fan rotation axis extending generally parallel to the upstanding members.