15:40 Architecture Collective

The 15-40 collective of architecture practices share a commitment to radically reduce the energy consumption of buildings through a ‘fabric first’ approach. The 15-40 name is informed by the metric that defines the maximum space heating demand (15 to 40 kWh/m².yr) used in Passivhaus and AECB building performance standards. The members of 15-40 include 7 Certified Passivhaus Designers and have extensive experience in delivering sustainable new build and retrofit projects using Passivhaus construction methodologies. We believe that by co-operating to share ideas, knowledge and resources we are able to offer clients a greater depth of expertise.

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