At JRG we have different models of casement windows. We work with the Sumum brand, of which we have the following series: Unik. With some of the unique insulation and airtightness values, and Uf: 0.88 W/m2K. Thanks to the use of ThermoFibra it gains in comfort and safety. Cubik. With a minimalist profile and straight, streamlined shapes. It has a 76 mm frame and a Uf: 0.94 W/m2K. Horizon. A design and technology united for greater energy efficiency. With 5 chambers in a 76 mm frame and 6 chambers in a 90 mm leaf. Zendow#neo Premium. With ThermoFibra, combining new and traditional materials, innovation and experience. With a 70 mm frame, and a 6-chambered 82 mm sheet. Thermally insulates 30% more.