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.
The United States gubernatorial elections of 2018 will be held on November 6, 2018, in 36 states. In addition, special elections may take place if other gubernatorial seats are vacated. These elections form part of the 2018 United States elections. The last regular gubernatorial elections for all but three of the states took place in 2014. Governors in New Hampshire and Vermont serve two year terms, and Oregon will have a special election in 2016 due to the resignation of John Kitzhaber.