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.
Thirty-three of the 100 Senate seats are up for reelection. The Republicans will be defending just 8 seats, while the Democrats will be fighting for 23, plus another 2 held by independents. The winners of those seats will serve a six-year term from January 3, 2019, until January 3, 2025.