Energiesprong UK hosted a design competition with the aim to develop new approaches for high performance, scalable and cost-effective net zero retrofit solutions. One of the winning teams were BowTieSprong who had a net zero energy concept design for low rise flats. We spoke with Hagop Heath-Matossian, Innovation Director, about the concept, challenges, and next steps. Watch the interview and let us know your thoughts or questions by commenting below.