John Palmer is Research and Policy Director at the Passivhaus Trust, where he recently authored Passivhaus: the route to Zero Carbon?, exploring how to ensure zero carbon targets result in zero emission buildings. John is a certified Passivhaus consultant, SAP Assessor, systems engineer and experienced project manager. In practice he works with a team of engineers using fabric-first building physics principles to design and build living spaces that are comfortable, healthy, energy efficient and easy to maintain. Prior to entering the construction sector, John spent 16 years as an engineering officer in the Royal Navy, which included three years at the Ministry of Defence.