Nasrin Kashefi is the general manager of plumbing programs at NSF International (www.nsf.org/info/plumbing). Kashefi, a 15-year NSF veteran, oversees NSF plumbing testing and certification services. She can be reached at 734/913-5743 or kashefi@nsf.org.
In recent years, consumer interest in radiant floor heating has increased significantly, sparking a wide variety of radiant floor heating products on the market.
