Drying Chamber Air Turnover
Actual ACH from air-mover and dehu CFM and gap to target ACH.
Example
You enter
- Chamber volume (ft^3) 1500
- Target ACH 60
- Air mover total CFM 1200
- Dehumidifier CFM 250
You get
- Actual ACH 58
- Required CFM 1500
- Gap to target 50 cfm
Details, formula, and sources
ACH = ((air_movers_total_cfm + dehu_cfm) × 60) / chamber_volume_ft³. Target ACH set by drying class (Class 1 ≥ 6, Class 2-3 ≥ 8, Class 4 ≥ 10 per IICRC S500-2021 typical). Gap = target_ACH - actual_ACH.
IICRC S500-2021 §12 (Drying Process) by name.
IICRC licensed; principles free in published water-damage-restoration training literature.
Estimate. AHJ and licensed professional govern.
Field names used by the API: chamber_volume_ft3, target_ach, air_mover_total_cfm, dehu_cfm, actual_ach, required_cfm, gap_cfm
- Default target ACH Class 1 ≥ 6, Class 2-3 ≥ 8, Class 4 ≥ 10IICRC S500-2021 typical