Franklin Hose Company No. 28, also known as Harmony Engine Company No. 6, is a historic fire station located in the Southwest Center City neighborhood of Philadelphia, Pennsylvania. It was originally built about 1849, and considerably altered with a new front in 1868–1869. It is a four-story, three-bay-wide building measuring 34 by 60 feet (10 by 18 m). It is constructed of brick, with an ashlar granite-faced first story and a mansard roof. It features round arched window openings and a heavy wood cornice. In February 2010, the building was undergoing renovation.

The building was added to the National Register of Historic Places in 1980.

• Historic American Buildings Survey (HABS) No. PA-1566, "Franklin Hose Company No. 28, 730–732 South Broad Street, Philadelphia, Philadelphia County, PA", 2 photos, 1 photo caption page