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One unit at a time, on its own axes, with the numbers underneath.
3.15 in square (80 mm) — ATS standard fitment
The magenta marker is your operating point. Water and air at 25 °C; crossflow, both fluids unmixed.
ATS-HE54 · 3.35″ × 3.35″ × 1.18″ core · rated 10 W/°C
Curves are computed from an ε-NTU model anchored to the published 10 W/°C rating for ATS-HE54. Fan behaviour is a two-point P–Q approximation, which tracks a real axial fan well near free delivery and less well close to shutoff. Confirm against test data before releasing numbers to a customer.