The ornamental design for a ceilingfanhousing, as shown and described.
FIG. 1 is a bottom perspective view of a ceiling fan housing showing an embodiment in accordance with my design;
FIG. 2 is a top plan view of the ceiling fan housing in accordance with my design;
FIG. 3 is a bottom plan view of the ceiling fan housing in accordance with my design; and,
FIG. 4 is an enlarged side elevation view of the ceiling fan housing in accordance with my design, all sides being substantially identical.
The broken line showing of portions of the ceiling fan is included for the purpose of illustrating environmental structure and forms no part of the claimed design.