R-22/Freon has been phased out (Jan 2020). R-410A/Puron is also on the way out, with other refrigerants coming to the market in 2023 (R-454b in Jan 2023?) Questions: 1. If R-454b is slightly flammable,… R-22/Freon has been phased out (Jan 2020). R-410A/Puron is also on the way out, with other refrigerants coming to the market in 2023 (R-454b in Jan 2023?) Questions: 1. If R-454b is slightly flammable,…Read MoreGreenBuildingAdvisor
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