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Air Flow — Temp Split
Same Air Flow grid as sensible and pressure — no separate Temp Split step, no dropdown.
- RA DB and SA DB each have °F (left) and °C (right). ΔT is the same coil split used in BTU = CFM × 1.08 × ΔT — not a second ΔT box.
- Cooling: ΔT = RA DB − SA DB. Changing ΔT keeps RA (the room reading) and fills expected SA: SA = RA − ΔT in °F. Example: RA 70 °F and ΔT 34.7 °F → SA 35.3 °F. Type 34.7 in the ΔT °C box only when you mean a Celsius difference (that is a 62.5 °F drop).
- Type SA when supply is the known reading — that can move RA. Do not expect both thermometers to move when you change ΔT.
- Heating: if you type SA > RA, ΔT is the rise (SA − RA). Leftover or negative SA is ignored when filling SA from RA + ΔT.
- RA WB is °F, not %. With RA DB it fills dew point (°F and °C). SA RH and RA RH sit beside each other. Example: 75 °F DB + 63 °F WB → dew ≈ 56 °F (~50% RH). 85 °F + 52 °F WB is ~3% RH, dew about −4 °F. SA RH is the same moisture at SA DB (no moisture change).
- Numpad C clears the focused field and leaves it empty. CLR STEP clears the Air Flow grid and the saved Air Flow session values.
Disclaimer: Field guide for technicians — not a substitute for nameplate data or local Code.