USA: ASHRAE is proposing to list a new low GWP R404A refrigerant replacement blend comprising an HFC, an HFO and CO2. The refrigerant, R455A, is currently being considered as a possible addition to ANSI/ASHRAE Standard 34-2013, Designation and Safety Classification of Refrigerants, as an A2L “mildly flammable” gas. Developed by Honeywell, the new refrigerant, with … Continue reading R404A replacement blends HFCs with CO2