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Refrigerants

The release of refrigerant gases into the environment can be harmful to both the potential occupants of the space, as well as to the environment in general. Chlorofluorocarbons and hydrofluorocarbons, commonly known as CFCs and HFCs, which were formerly considered relatively safe, are now known to be a significant contributor to climate change. While these older refrigerants are gradually being replaced by more environmentally friendly refrigerants this does not lessen the need for leak detection. Regardless of their reduced impact on the environment, even modern refrigerants pose the risk of displacing the oxygen in mechanical/chiller rooms, should a leak occur and are generally required by code.

We are continuously adding to the list of refrigerants we can detect. Below is a list of some of the most common, but if you don't see yours listed please contact us.
ASHRAE Number Chemical Name Molecular Formula
R22 Chlorodifluoromethane CHClF2
R23 Trifluoromethane (Fluoroform) CHF3
R32 Difluoromethane CH2F2
R123 2,2-Dichloro-1,1,1-trifluoroethane C2HF3Cl2
R125 Pentafluoroethane C2HF5
R404a R-125/143a/134a (44±2/52±1/4±2) 44±2% C2HF5 · 52±1% C2H3F3 · 4±2% C2H2F4
R407a R-32/125/134a (20±2/40±2/40±2) 20±2% CH2F2 · 40±2% C2HF5 · 40±2% C2H2F4
R438a R-32/125/134a/600/601a (8.5+.5,-1.5/45±1.5/44.2±1.5/1.7+.1,-.2/.6+.1,-.2) 8.5+.5,-1.5% CH2F2 · 45±1.5% C2HF5 · 44.2±1.5% C2H2F4 · 1.7+.1,-.2% C4H10 · .6+.1,-.2% C5H12
R134a 1,1,1,2-Tetrafluoroethane C2H2F4
R407c R-32/125/134a (23±2/25±2/52±2) 23±2% CH2F2 · 25±2% C2HF5 · 52±2% C2H2F4
R407f R-32/125/134a (30±2/30±2/40±2) 30±2% CH2F2 · 30±2% C2HF5 · 40±2% C2H2F4
R410a R-32/125 (50+.5,–1.5/50+1.5,–.5) 50+.5,–1.5% CH2F2 · 50+1.5,–.5% CHF2CF3
R448a R-32/125/134a/1234ze/1234yf (26%/26%/21%/7%/20%) 26% CH2F2 · 26% C2HF5 · 21% C2H2F4 · 7% C3H2F4 · 20% C3H2F4
R449a R-32/R-125/134a/1234yf (24.3%/24.7%/25.7%/25.3%) 24.3% CH2F2 · 24.7% C2HF5 · 25.7% C2H2F4 · 25.3% C3H2F4
R452a R-125/1234yf/32 (59%/30%/11%) 59% C2HF5 · 30% C3H2F4· 11% CH2F2
R455a R-32/1234yf/744 (75.5%/21.5%/3%) 21.5% CH2F2 · 75.5% C3H2F4 · 3% CO2
R507a R-125/143a (50/50) 50% C2HF5 · 50% C2H3F3
R513a R-1234yf/134a (56%/44%) 56% C3H2F4 · 44% C2H2F4
R1234ze 1,3,3,3-Tetrafluoropropene C3H2F4
R514a R-1336mzz-Z/trans-1,2-Dichloroethene(t-DCE)(74.7%/25.3%) 74.7% C4H2F6 · 25.3% C2H2CL2
R1233zd 1-Chloro-3,3,3-trifluoropropene C3H2ClF3
R1234yf 2,3,3,3-Tetrafluoropropene C3H2F4

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Armstrong Monitoring
215 Colonnade Road South
Ottawa, Ontario, Canada
K2E 7K3
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