Visitors to R951 (951 Pacific St., Brooklyn) may not see much difference from other new developments. That’s among it’s wonders – one of the first Passive House and net zero capable condo projects in the city. It’s designed and built by Castrucci Architect, a Lower East Side hothouse of Passive House work. At a recent opening, architects from across the city lined up for a first hand look at it’s PH details and cutting edge materials and design. Radical energy efficiency doesn’t require Buckminster Fuller type forms, or to feel like an Adirondack hunting lodge in winter or high cost premiums, hopefully good signs for the built and natural environment. More details at Inhabitat.