According to Brownstoner, an 1846 vintage row house on Sidney Place is being made into a “Passive House”, a technology developed in Germany that, through use of insulation, airtight windows and doors, and high efficiency heat pumps, reduces the energy needed to heat or cool the house by 80 to 90 percent.
The story indicates that the window treatments have been approved by the Landmarks Preservation Commission; it also claims that this is the first Passive House conversion of a landmarked building, but one of the comments in the thread below the story says that a landmarked house in Park Slope has already undergone such a renovation.
Photo: Brownstoner