Hello, Babies, particularly newborns, can't adjust their body temperature as well as adults. This makes them vulnerable to overheating and heat-related illnesses such as heat rash,dehydration, heat exhaustion or heatstroke. properly cooled and ventilated room helps your baby to sleep comfortably and reduces the risk of  Sudden Infant Death Syndrome. On the other hand, a room that is too cold could severely lower your baby's body temperature and chill him. Follow these tips to help keep your baby safe and comfortable while using an air conditioner or cooler:  Maintain a comfortable room temperature, a range between 23 and 26 degrees C, which is very crucial, temperature should be maintained all 24hrs a day, otherwise wise ceiling fan is better option. Keep your baby away from the direct blast of cold air from the AC Get your AC or cooler regularly serviced for clean and efficient cooling  Keep your baby well moisturised as using an AC may dry up his skin , moisturisers prescribed by doctors will help to prevent that (little inside nostrils should also be applied with ear bud to prevent drying (prevents bleeding from nostrils due to drying ) Don't take your baby to a warm place immediately after leaving an air conditioned room . Exclusive Breastfeeding or frequent Breastfeeding prevents throat dryness.