What's the right temperature for aircon in a newborn babies room? I hear some people say 18-20, others say 23-25. What temperature do you have your baby sleep in?

I've read that 24degC is ideal for babies who are 2 years and above while 18-20degC is okay for young babies who are wearing footed onesies or swaddled or in sleeping bags. My friends don't use air conditioning on their babies. They usually use fans and keep the room well ventilated. I'd do the same, to be honest. I'm not a big fan of air conditioning in general. http://sg.theasianparent.com/the-ideal-temperature-for-your-babys-room/