front page arrow Company Services Contact information Air conditioning work from a professional J. Hakanen Oy is an expert in the field of ventilation. We specialize in ventilation repair, renovation and maintenance work. We operate in the metropolitan area and surrounding municipalities. Our most important customers are cities, municipalities, public entities, hospitals, developers and housing companies. Our goal is to offer the customer all ventilation-related services under one roof. The most important thing for us is customer satisfaction. Juha Hakanen Vernissakatu 5 B 68 01300 Vantaa Tel. 040 5155 037 juha.hakanen@jhakanen.fi