PUTNAM GREEN CAMBRIDGE, MA
Achieving a LEED-for-Homes Platinum rating, these 40 apartments surround a sunny, landscaped courtyard to maximize passive solar design. The 34-unit midrise incorporates a super-insulated building envelope, 96% efficient mechanical systems, heat recovery ventilation, and energy producing photovoltaic and solar thermal rooftop systems. Separate six-family townhouses are built with SIPS (structural insulated panel system) to achieve an R-30 envelope with individual unit energy recovery. Although targeting high levels of energy efficiency, the buildings are warm and inviting, featuring a curving entry porch and bays playfully engaging the more traditional neighborhood features.