Heat pump the brand name Freon, a trademark of DuPont. Its manufacture is now banned or severely restricted by the Montreal Protocol of August 1987 because of the damage that CFCs cause to the ozone layer if released into the atmosphere. One widely adopted replacement refrigerant is the hydrofluorocarbon (HFC) known as R-134a (1,1,1,2-tetrafluoroethane). Heat pumps using R-134a replaced R-12 (dichlorodifluoromethane) and have similar thermodynamic properties but with insignificant ozone depletion potential and a somewhat lower global warming potential. Other substances such as liquid R-717 ammonia are widely used in large-scale systems, or occasionally the less corrosive but more flammable propane or
1987–88 Montreal Canadiens season 1987–88 Montreal Canadiens season The 1987–88 Montreal Canadiens season was the team's 79th season. The club qualified for the playoffs, defeated the Hartford Whalers in the first round, but were eliminated in the Adams Division finals versus the Boston Bruins four games to one. "for more information visit" 1988 NHL Entry Draft Defensively, the Canadiens were the best team in the league, finishing the regular season with just 238 goals against. They also allowed the fewest power-play goals, with just 64 Hartford Whalers vs. Montreal Canadiens The Habs almost squandered a 3–0 series lead. The deep Habs roster was the