Radiant systems heat the floor, not the home. That's only true in certain cases, specifically with electric in-floor products meant to provide supplemental warmth in, say, the chilly master bath—or in any space the primary heating system (e.g., forced-air) fails to keep comfortable. That's compared with hydronic radiant systems. The latter are not supplemental. On the contrary, hydronic radiant systems are installed instead of, not in addition to, a conventional heating system. Indeed, radiant systems like Warmboard deliver heat, not only to the floors, but throughout the entire home.