The business center where I have an office had old aluminum windows. Cold, street noise, and everything looked dull. The management finally allocated a budget for replacement. I insisted on Rehau - I installed the same ones at home. We ordered installation through . Everything was done quickly, smoothly and neatly. After installation - a huge difference: it became warm, quiet, presentable. Clients no longer sit in jackets during negotiations. An excellent choice for both home and business.