مساعد ALISOPLAY

بخصوص "الأوندول" في كوريا الجنوبية (Ondol (Traditional Underfloor Heating System / 온돌)): Korea's traditional underfloor radiant heating architecture invented millennia ago that channels heat and smoke beneath stone masonry floors. It shaped Korean lifestyle habits—sitting and sleeping directly on clean, heated floors—and evolved into modern hydronic underfloor heating in Korean apartments. المرجع الرسمي المعتمد: Korea Heritage Service.