The "Bau- & Energietage Ostallgäu" (Construction & Energy Days Ostallgäu) takes place annually in October at the MODEON in Marktoberdorf and is a key event for both experts and the general public interested in energy-efficient construction and renovation. Organized by eza! Service GmbH, a non-profit organization dedicated to promoting renewable energy, the fair offers an essential platform for regional exhibitors to showcase their latest products and services. The fair covers a wide range of topics, including heating, ventilation, and solar technology, as well as optimal thermal insulation for roofs and facades, modern windows, and relevant funding programs. As a central hub for the latest information and innovations in the industry, the event provides comprehensive answers to questions about energy-efficient construction, renovating older buildings, and utilizing renewable energy sources. One of the highlights is the numerous practical presentations by experienced professionals, offering in-depth insights into all aspects of energy-optimized construction. These talks turn the fair into an educational event that delivers practical solutions and inspiration for the challenges of modern construction. The MODEON, a cultural center with modern infrastructure and a welcoming atmosphere, provides the perfect setting for this trade fair. It not only supports the regional economy but also helps raise public awareness and educate attendees on important environmental topics. In summary, the "Bau- & Energietage Ostallgäu" is a unique event distinguished by its strong regional focus, the presentation of forward-thinking technologies, and a comprehensive program of lectures. It offers both professionals and interested laypeople valuable insights and effective solutions for the future of construction. The Construction & Energy Days Ostallgäu will take place on 2 days from Saturday, 18. October to Sunday, 19. October 2025 in Marktoberdorf.