Living in an environment with constant AC is not very good for you. Myself I go to Florida or Las Vegas and stay in 24/7 AC and after one day I will be coughing and just don't feel right. I found this and believe it. I do use AC here, but only when needed..............
Is it harmful to be in AC all day?
Staying for a longer period in an air conditioning system does more harm than good, it can also lead to dehydration. AC sucks too much humidity from the room, which will end up making you feel dehydrated. Staying in AC for too long can lead to respiratory problems.