This document discusses radiant warmers and incubators used in neonatal care. Radiant warmers use overhead heating elements to provide infrared radiation and maintain a warm microenvironment for the infant. Incubators provide closed environments that reduce heat and moisture losses through conduction, radiation, and evaporation. Both systems aim to control the infant's temperature, but radiant warmers allow for more access while incubators better regulate the environment and reduce infection risks. Precautions must be taken with both to avoid overheating or hypothermia in fragile neonatal patients.