IEC 60601-2-21:2009+A1:2016 specifies the safety requirements for infant radiant warmers. This particular standard amends and supplements IEC 60601-1:2005, Medical electrical equipment - Part 1: General requirements for basic safety and essential performance. This second edition cancels and replaces the first edition published in 1994 and its Amendment 1 (1996). This edition constitutes a technical revision. This edition of IEC 60601-2-21 was revised to structurally align with the 2005 edition of IEC 60601-1. The contents of the corrigendum of February 2013 have been included in this copy. This consolidated version consists of the second edition (2009) and its amendment 1 (2016). Therefore, no need to order amendment in addition to this publication.