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 United States, Election Day is set by law as a day to elect public officials. It always falls on the Tuesday following the first Monday in November. Presidential elections are held every four years. Elections to the House of Representatives and United States Senate are held every two years. U.S. Representatives serve two year terms while Senators serve six year terms. Many state and local governments hold elections on the same dates as federal elections.