Lighting Power Density Calculator
Calculate LPD for energy code compliance per ASHRAE 90.1.
LPD Allowances (ASHRAE 90.1-2022)
| Space Type | W/sq ft |
|---|---|
| Open Plan Office | 0.72 |
| Enclosed Office | 0.74 |
| Conference Room | 0.97 |
| Corridor | 0.41 |
| Retail Sales | 1.05 |
| Classroom | 0.71 |
| Warehouse (Bulk) | 0.33 |
Building Area Method LPD Allowances
| Building Type | ASHRAE 90.1-2022 | ASHRAE 90.1-2019 | Notes |
|---|---|---|---|
| Office | 0.64 W/sf | 0.79 W/sf | Most common application |
| Retail | 0.84 W/sf | 1.06 W/sf | Includes display lighting |
| Warehouse | 0.45 W/sf | 0.48 W/sf | General storage areas |
| School | 0.72 W/sf | 0.81 W/sf | K-12 and higher ed |
| Hospital | 0.96 W/sf | 1.05 W/sf | Inpatient facilities |
| Hotel | 0.56 W/sf | 0.75 W/sf | Guest rooms and common |
| Restaurant | 0.71 W/sf | 0.90 W/sf | Dining areas |
| Manufacturing | 0.82 W/sf | 0.95 W/sf | Production areas |