system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What's so special about air-condition air that irritates people's throats? Can it be corrected?
gpt
The amount of moisture the air can hold is correlated with the air's temperature. 


Warm air has the ability to hold a lot of moisture. But as that warm air cools down, it loses the ability to hold onto all that moisture. This is known as condensation. 

Colder air then is dryer than warmer air. As you inhale that cold air, your body heat begins to warm it. As the air warms its moisture potential also goes up. So, now with a higher moisture potential to equalize the moisture has to come from somewhere; your body. 

~~There is a component of the ac unit called a 'condenser'. This part stores the moisture the warmer air contained, but after cooling process can no longer hold onto in its less energetic (colder) state. If you've ever seen an ac unit dripping water this is because the ambient air is warm and full of moisture (called humidity)~~. 

In the winter the ambient air has low humidity, when that cold, dry air is pulled into your house and warmed its moisture potential increases and you end up with dry eyes, cracked lips, nose bleeds etc becuase the air is leeching that needed moisture from every source of moisture available.



Hope that explained it well.