The better underfloor heating system in the United States is typically the electric radiant heating system. This is due to its efficiency, ease of installation, and the ability to provide a consistent and comfortable heat distribution throughout the home. According to the U.S. Department of Energy, electric radiant heating systems can be up to 100% efficient, meaning that almost all of the energy used is converted into heat. Additionally, they can be installed in a variety of floor coverings, including tile, stone, and wood, making them a versatile choice for different types of homes.

Electric radiant heating systems work by heating the floor itself, which then warms the air in the room. This method of heating is more efficient than traditional forced-air systems because it does not require the air to be circulated throughout the home, reducing energy loss. Furthermore, electric radiant heating can be controlled with smart thermostats, allowing for precise temperature regulation and energy savings. A study by the Radiant Floor Heating Association found that radiant heating can reduce energy consumption by up to 10-15% compared to traditional heating systems.

In contrast, hydronic underfloor heating systems, which use water to transfer heat, can be less efficient due to the heat loss associated with water circulation. While hydronic systems are often more cost-effective to operate over time, they require a more complex installation process and are not as versatile in terms of floor coverings. Additionally, they may not be as effective in homes with higher ceilings or in areas where the water supply is not consistent.

The choice between electric and hydronic underfloor heating systems ultimately depends on the specific needs and preferences of the homeowner. However, based on efficiency, ease of installation, and overall performance, electric radiant heating systems are generally considered the better option in the United States.