The Harlem Passive House is a complete gut renovation of a five level corner brownstone to meet low energy Passive House criteria. Passive House features include a perimeter built up wall of 7” cellulose inside an INTELLO vapor barrier with an outer partition wall for running electrical conduit. Windows are aluminum-clad wood with triple glazing by Klearwall. The mechanical system consists of a Mitsubishi mini split heat pump with heat recovery ventilation by Zehnder and Lunos. A large skylight over a widened stair opening along with ample side windows minimizes the use of LED lighting during the day. A Heliodyne 120 gallon solar hot water system provides domestic hot water using Gobiflat plate collectors. Infrastructure is in place for future photovoltaic panels that will eventually offset the owners’ electrical use.