radiantheat

Radiant heat, or radiant heating, is a method of transferring warmth by infrared radiation from a hot surface to people and objects in a space. It heats objects directly rather than relying primarily on warming the air, which can create a comfortable atmosphere with minimal air movement.

There are two main types of radiant heating systems. Electric radiant systems use electric resistance elements—such as cables, mats, or panels—embedded in floors, walls, or ceilings to generate warmth. Hydronic (water-based) radiant systems circulate warm water through tubing installed in floors, walls, or ceilings, typically powered by a boiler or heat pump. Hydronic systems are commonly used for whole-house heating, while electric systems are popular for retrofit projects and smaller areas.

Common configurations include radiant floor heating, the most widespread option, where warm water or electric mats are installed beneath the floor surface, delivering heat upward to occupants. Wall and ceiling panels offer alternative radiant sources, and outdoor radiant heaters provide targeted warmth for patios or entryways.

Advantages of radiant heating include comfortable, even warmth with reduced air movement, potential energy efficiency when paired with good insulation and temperature controls, and concealed installation that frees up wall space. Limitations include higher upfront installation costs, especially for hydronic systems, longer heat-up times for some setups, and the need for proper insulation and suitable floor coverings to maximize efficiency. Retrofitting existing structures can be complex, and operating costs depend on energy prices and the chosen heat source.

Control methods typically involve zone thermostats and sometimes smart controls to optimize comfort and efficiency.