We are members of the AECB group, and we are committed to being an agent to improve the sustainability of the industry through low carbon emissions construction solutions. Passivhaus standards or protocols refer to buildings created to rigorous energy efficient design standards so that they maintain an almost constant temperature. Passivhaus buildings are so well constructed, insulated and ventilated that they retain heat from the sun and the activities of their occupants, requiring very little additional heating or cooling.