Wirsbo Radiant Floors circulate warm water under floor surfaces to create a thermal mass that heats rooms gently, comfortably and efficiently. Radiant floor heating warms the objects in the room not the air, so heat stays with people not up near the ceiling. Wirsbo offers options for different situations and budgets. The Wirsbo Radiant Ready™ system can be installed into the home's concrete slab during construction making it an ideal choice for new construction.