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The development had to pack a pretty big punch to achieve its LEED Platinum rating. The design starts with an efficient shell made from low-impact framing materials and filled with closed-cell expanding foam. The façade is placed over the shell to provide a kind of mini veranda. Natural daylighting is ever present, and an upper skylight provides ambient light which penetrates through the stairwell’s translucent floor to the levels below.

Below the flooring is a hydronic heating system is supplemented with a solar thermal. In fact each unit’s system – from lights to HVAC to entertainment –  is centrally controlled. The result is a 50% reduction in energy cost as compared to homes built to the standard code.eco nieghborhood,"Philadelphia architecture",LEED certified Philadelphia, eco duplex, LEED platinum home, Philadelphia LEED H, rainwater collection, roof top garden, Onion flats, light shaft stairwell, dense design, green urban design

The building is also in proximity to public transportation and helps to revitalize and dated neighborhood. The back parking area uses permeable pavers to absorb rainwater and reduce heat gain. Moreover, the design has integrated a plug-in station for electric vehicles. Residences are also invited to use the electric wheels provided on site.

The roof deck provides an extraordinary escape calling for relaxation, and an elevated sanctuary, private garden and patio provide for an outdoor living space without taking up valuable urban space. Morevover, rainwater is collected for the public and private gardens on-site.

The overall design of Thin Flats exemplifies clever place making, contemporary style and sustainable systems, all while pushing the idea of dense but spacious urban development.

+ Plumbob

+ Onion Flats

Via Archdaily