The Construction Specifier, June 2014, by Ryan Westlund.
http://www.constructionspecifier.com/masterformat/being-radiant-planning-in-slab-hydronic-heating-and-cooling/

"Radiant systems are ideally suited to a broad range of commercial applications and achieve best results when combined with other energy-efficient solutions in tight building structures. While radiant heating-only systems have a long history in conditioning both commercial and residential structures, radiant cooling is fairly new to North America. Early adopters of these systems were located primarily in arid regions. Mainstream acceptance required the development of more advanced controls, coupled with compelling evidence of reduced energy consumption for the built environment."