Yes, radiant heat does use radiators. Radiators are a type of heat exchanger that transfers heat from a hot fluid, such as water or steam, to a cooler fluid, such as air. In a radiant heating system, the hot fluid is circulated through a network of pipes and radiators, which then transfer the heat to the surrounding air. This type of heating system is often used in residential and commercial buildings, as it is an efficient and cost-effective way to heat a space.