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 . 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.