De Haan BV is founded in 1823 at Hoogezand as supplier of ventilation cowls. Nowadays we are developed to an engineering and installation company with worldwide operational systems. Our core business are marine ventilation, heating, cooling and sanitary systems. Landside De Haan BV does the engineering and installation of building climate systems, industrial cooling, industrial ventilation and sanitary systems. Many years of experience make us to an valuable partner for your projects.