Modern air conditioning begins and ends with refrigerant, a catch-all term used to describe various types of chemical compounds that constantly circulate through your system. Refrigerant is marked by a fairly low boiling point temperature-wise and an ability to pull heat from the surrounding air as it shifts from liquid to gaseous form. The air conditioning system simply takes advantage of that fact. Here in Dover, De, our hot summers mean that you need your air conditioner need to be functioning at its peak at all times. Understanding how refrigerant cools the air can go a long way towards understanding what kinds of problems may arise with your system.