Estimate the dehumidification a space needs for water-damage drying. Enter the room's cubic footage and the class of loss to get a target in AHAM pints per day — and roughly how many LGR units that means.
Fill this in on site and attach it to your file.
| Field | Value |
|---|---|
| Job / claim # | |
| Room / area | |
| Target PPD | |
| Dehumidifier(s) placed | |
| Air movers placed | |
| Class of loss | |
| Day 1 / 2 / 3 RH |
This calculator uses the cubic-foot method: take the room's volume (length × width × height) and divide by a factor that tightens as the class of loss rises. The result is a target in AHAM pints per day — the standardized way dehumidifier capacity is rated — which you then translate into units.
| Class | Divide cubic feet by |
|---|---|
| Class 1 | 100 |
| Class 2 | 50 |
| Class 3 | 40 |
| Class 4 | 40 (specialty) |
Manufacturers rate LGR dehumidifiers at AHAM (a fixed test condition) and at higher "saturation" pints. Real capacity drops as the air dries, so size with headroom and let your daily readings drive the adjustments.