The ornamental design for a heatrecovery apparatus, as shown and described.
FIG. 1 is a top plan view showing heater exhaust ports wherein air passes horizontally thru the heat recovery apparatus, wherein the top and bottom view are identical;
FIG. 2 is a front side elevational view thereof showing the vertical heat recovery ports, wherein both front and back side are identical;
FIG. 3 is a side elevational view taken from FIG. 1, wherein each side view is identical; and,
FIG. 4 is a perspective view thereof.
The heat recovery apparatus is installed in any heating unit exhaust duct and is designed to safely recover and utilize wasted heat.