Drying Log (IICRC S500 Boundary Test)
Multi-row drying log: ambient / chamber paired daily readings, per-day boundary-humidity pass (chamber GPP must trend below ambient GPP), chamber GPP trend slope (GPP/day), and dry-down completion estimate. Up to 14 readings. Per IICRC S500-2021.
Formula and source
Per reading: GPP = humidity-ratio * 7000 from temperature_F / RH via the bundled psychrometric helper. Boundary-pass: chamber_GPP < ambient_GPP. Trend: linear regression of chamber_GPP vs day_index (least-squares). Estimated days-to-target = (target - intercept) / slope - last_day, when slope is negative.
IICRC S500-2021 (Standard for Professional Water Damage Restoration). Public-domain boundary-humidity test method; IICRC governs acceptance.
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