front page Services Contact information A-Eristys Oy A-Eristys Oy is an insulation company founded by Olli Lehtonen, which has been operating since 2010. The company's area of operation is mainly the Turku economic area up to Salo. Lehtonen has been an insulator since 1997. At present, his company employs six professionals in the field. Take contact! A-Eristys Oy, Haikankatu 4, 21200 Raisio, Tel. 040 5286008 Mobile