Yes, radiant floor heating can be used to replace radiators. Radiant floor heating is a type of heating system that uses hot water or electric coils to heat the floor from below. This type of heating system is more efficient than radiators, as it heats the entire room evenly and does not require the use of fans or blowers. Additionally, radiant floor heating is more aesthetically pleasing than radiators, as it is hidden beneath the floor and does not take up any wall space. However, it is important to note that radiant floor heating is more expensive to install than radiators, and may require additional insulation to ensure optimal performance.