No Radiators, No Vents: Seeing the Secret of 'Ondol' with a Thermal Camera
Looking beneath the floor of my apartment and planning for my apiary. In the Korean winter, there is a reason why homes feel uniquely cozy. It’s not because of the warm air—it’s because the floor itself is warm. We take this for granted in Korea, but I know that globally, our heating system, called 'Ondol,' is quite unique. Today, I decided to use a thermal imaging camera to look beneath the surface of my apartment floor. I also want to share how this technology is influencing my plans for a future resting hut at my apiary. 1. The Anatomy of Warmth: How Ondol Works When you step onto a warm Korean floor, you are standing on top of a sophisticated engineering system. This AI-generated image illustrates exactly what is happening beneath our feet. Unlike Western homes that often use radiators to heat the air, our system starts with a boiler. It heats water and pumps it through a complex network of pipes—known as "XL pipes" —embedded in the concrete floor. Think of it...