Heat exchanger assembly

A heat exchanger assembly, comprising:

• a frame;
• a heat exchanger panel mounted to the frame and configured to exchange heat with air flowing therethrough, the heat exchanger panel having a lower end and an upper end, the heat exchanger panel being disposed at an inclined orientation such that the upper and lower ends thereof are offset from one another, the heat exchanger panel comprising:
• a tubing arrangement for circulating fluid therein;
• and
• a plurality of fins in thermal contact with the tubing arrangement, the fins being spaced apart from one another for air to flow therebetween and into an interior space of the heat exchanger assembly;
• a plurality of enclosing panels connected to the frame and defining in part the interior space of the heat exchanger assembly;
• a fan assembly disposed vertically above the heat exchanger panel, the fan assembly comprising:
• a fan mount;
• and
• a fan impeller connected to the fan mount, the fan impeller being rotatable about a fan rotation axis to pull air into the interior space of the heat exchanger assembly through the heat exchanger panel and evacuate heated air upwardly from the interior space of the heat exchanger assembly through the fan assembly, the fan impeller being sized and positioned such that part of the fan impeller rotates vertically above the upper end of the heat exchanger panel;
• a casing mounted to the frame between the fan assembly and the upper end of the heat exchanger panel, the casing comprising a plurality of inner walls for guiding air from the heat exchanger panel toward the fan assembly such that the inner walls of the casing define in part the interior space of the heat exchanger assembly, the plurality of inner walls of the casing including a sloped wall extending from a lower end to an upper end, a distance between the upper end of the sloped wall and the fan rotation axis being greater than a distance between the lower end of the sloped wall and the fan rotation axis, the sloped wall being adjacent to the upper end of the heat exchanger panel such that the part of the fan impeller rotates vertically above the sloped wall.