Abstract: A hair dryer and dryer system mountable between a pair of wall panels includes a hollow cylindrical housing having open inlet and outlet ends and a passageway extending therebetween, a group of co-operative components supported by the housing in communication with its passageway and co-operable to induce an inflow of unheated air into the housing open inlet end and an outflow of heated air from the housing open outlet end, a threadably adjustable annular coupler at the housing open inlet end, and an annular flange at the housing open outlet end. The annular coupler and annular flange together enable the housing to be disposed between and clamped respectively to the wall panels with the open inlet and outlet ends of the housing respectively occupying the first and second openings of the wall panels.