Zero Energy is an international engineering practice specialising in Passivhaus buildings. The company was initially set up in 2011 in the Scottish Highlands by Dr Jesus Menendez. At Zero Energy, we use advanced building physics knowledge in the building industry to help our clients to achieve low-energy and healthy buildings. We are an accredited Passivhaus course provider using the official and updated PHI material for Passivhaus Designers, Passivhaus Tradespeople and the new Passivhaus PHPP Expert course. We have been Passivhaus building certifiers since 2017 for any Passive House project around the world. To date, we have been involved in many certified projects around the world. We also undertake third-party non-destructive testing, such as Blower door tests, extinguishing gas retention time tests, infrared thermography, in situ U-value measurement for the building envelope or compensated airflow measurement in ventilation systems using balometers.