The ornamental design for a fanhousing, as shown and described.
FIG. 1 is a perspective view of a fan housing embodying the design of the present invention.
FIG. 2 is a front elevational view of the fan housing illustrated in FIG. 1.
FIG. 3 is a rear elevational view of the fan housing illustrated in FIG. 1; and,
FIG. 4 is a right side elevational view of the fan housing illustrated in FIG. 1, with the left side elevational view being identical thereto.
The broken line showing of portions of the fan housing is included for the purpose of illustrating environmental structure and forms no part of the claimed design.