Total sensible + latent cooling load - sum of solar gain, transmission, infiltration, occupants, lighting, equipment, fresh-air make-up.
Formula
$$ Q_\text{total} = \left(\sum Q_i \right) \cdot (1 + M) $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $Q_\text{solar}$ | Solar gain via glazing | kW | CLTD / ASHRAE Ch.18 |
| $Q_\text{trans}$ | Wall / deckhead conduction | kW | U·A·ΔT |
| $Q_\text{infil}$ | Air leakage | kW | ACH × vol × Δh |
| $Q_\text{occ}$ | Occupant sensible + latent | kW | ASHRAE 110 W/person |
| $M$ | Margin factor | - | designer |
Sources
- ASHRAE Handbook - Fundamentals Ch.18.