HVAC Systems · Refrigeration — Refrigerants & ASHRAE 34
R-448A
A lower-GWP A1 HFO/HFC blend (Solstice N40) used to replace R-404A and R-22 in supermarket and commercial refrigeration. It has noticeable temperature glide (~5–9 °F), so charge as a liquid and read superheat/subcool off the correct saturation line.
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