Description
In terms of safety, R-404A is non-flammable and low in toxicity (ASHRAE A1 classification), but any leak or fire exposure must be handled carefully due to asphyxiation risk and potential hazardous decomposition products. From an environmental perspective, it boasts zero ozone depletion potential (ODP = 0) but has a high global warming potential (GWP ≈ 3,900), making it less favorable under stricter environmental regulations and leading to its gradual phase-down in many regions.
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R-404A is especially used in low- and medium-temperature refrigeration systems. Some of its common uses include:
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Supermarket freezer and display cases
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Cold storage rooms
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Refrigerated transport and trucks
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Ice machines, show cases, vending machines, and similar commercial refrigeration equipment
Because its thermodynamic behavior is relatively close to that of older refrigerants like R-502 (which it often replaces), many systems originally designed for R-502 can be retrofitted to R-404A (with appropriate modifications) However, care must be taken regarding lubricants and other compatibility issues (see below).
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