The main goal of this research was to determine the building characteristics of projects with radiant heating and cooling and assess their real world energy use compared to standard benchmarks for building energy performance. The report describes the general building characteristics including type, size, location and climate zone of 23 buildings in North America with radiant distribution systems for both heating and cooling the predominant area of the building. The study found that almost all of the 23 buildings outperformed peer buildings and national benchmarks, suggesting that radiant systems are part of the integrated approach that can lead to low energy consumption in commercial buildings.