The ornamental design for a ceilingfanhousing, as shown and described.
FIG. 1 is a bottom perspective view of a ceiling fan housing showing my new design;
FIG. 2 is front elevational view thereof, the rear elevational view thereof, the left side elevational view thereof, and the right side elevational view thereof being substantially the same thereof;
FIG. 3 is a reduced bottom plan view thereof; and,