Yes, underfloor heating can be sufficient to heat a room effectively, depending on the room's size, insulation, and the type of underfloor heating system installed. Underfloor heating systems are designed to provide even, consistent heat across the entire floor surface, which then rises and warms the entire room. They are particularly efficient in well-insulated homes and spaces, where they can maintain a comfortable temperature even in cold weather. However, in larger rooms, areas with high ceilings, or in buildings with poor insulation, additional heating sources may be needed to supplement the underfloor heating for optimal comfort. It's always recommended to consult with a heating professional who can assess your specific needs and circumstances to provide the best heating solution.