They are air, calcium chloride brine, sodium chloride brine, alcohol, and similar nonfreezing solutions. The purpose of Class 2 refrigerants is to receive a reduction of temperature from Class 1 refrigerants and convey this lower temperature to the area to be air-conditioned.
Elections for the United States Senate will be held on November 8, 2016, with 34 of the 100 seats in the Senate being contested in regular elections whose winners will serve six-year terms from January 3, 2017 until January 3, 2023.
In the last three Senate elections, Class 2 Senators were elected in 2008, Class 3 Senators were elected in 2010, and Class 1 Senators were elected in 2012. In the next three Senate elections, Class 2 Senators will be elected in 2014, Class 3 Senators will be elected in 2016, and Class 1 Senators will be elected in 2018.