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Air Conditioning Load Calculator

Estimates sensible & latent cooling loads. Units SI. Defaults are editable.

Design indoor temperature (T_in) °C

Outdoor temperature (T_out) °C

Indoor relative humidity (%)

Outdoor relative humidity (%)

Volume of space (m³)

Air changes per hour (ACH) — ventilation + infiltration

Ventilation flow (if known) L/s

Supply air temperature (°C) — for sensible balance

Enter each surface as Area (m²) and U (W/m²·K). Add multiple by pressing +Add. Use 0 area to ignore.

People (number)

Sensible per person (W)

Latent per person (W)

Lighting power (W)

Equipment/plug load (W)

Window area (m²)

Solar heat gain factor (SHGF) W/m² (incident)

Shading factor (0–1)

SHGF depends on orientation/time; user may change it.

Air Conditioning Load Calculator