174 Grand St, Brooklyn

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Mixed use building: private residence above retail store. This Loadingdock attempt to build NYC's first new building which fulfills the strict german Passiv Haus standard.

Envelope design is comprised by:

walls: load-bearing 8" concrete masonry units with 6" EPS exterior insulation

parapets: autoclave aerrated concrete blocks to avoid thermal bridging

exterior finish: EFIS with 7" EPS

interior finish: CMU painted, all electric installation

exposed roof: 4" concrete on steel deck covered by 8" rigid insulation

windows: Walch Windows from Austria residence

entrance door: custom 4" thick wood panel.

Mechanical concept:

one Mitsubishi ducted indoor unit for remaining heating and cooling demand. Zehnder ComfoAir 350 Enery Recovery Ventilator exterior sun sail at the south facade to avoid summer overheating

Status: Built

Architect: Loadingdock5

Website: https://www.loadingdock5.com

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"Passive House" is an important building standard that brings efficiency and comfort together.  New York City has a growing number of these new, state of the art buildings that save money and the climate. Also known as Passivehaus (this standard has German roots), several of the newest buildings came from this national database, Passive House Projects. This map is made by Green Map System's own local Green Map NYC project. We created our first Passive House Green Map in 2013, and in summer 2025, 50 buildings were added and/or updated by Simone Reckhaus, our intern from University of Bologna in Italy. Share this Green Map at bit.ly/PHBldg-NYC. Add new buildings to this map at bit.ly/AddBldg

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