Before our studio trip to Philadelphia we looked up buildings that were in the area. I found this high density development called the Rag Flats that was designed and build by a firm called Onion Flats.
The building had previously been an industrial rag factory but was converted into living space by Onion Flats. The five buildings contain eleven units that use many green systems. The apartments receive 80-100% of there electricity from solar panels, there is a 6000 gallon underground rain collection cistern, they use radiant floor heating, and they have many habitable green roofs. Also the buildings are designed so that they receive a large amount of natural light so that they don’t have to use as much electricity.