It gives a quick room cooling load: sensible and latent load, total capacity in kW, TR and Btu/h, and the supply airflow. Enter the room size, people, design temperatures, sun-exposed walls, windows, roof, lighting, equipment, infiltration and fresh air.
People, lighting, equipment, infiltration, fan heat and the safety factors are added on top. 1 TR = 3.517 kW.
This is a quick estimate for early design and checking. It does not correct walls and roof for sun position or time of day. For final design use a detailed method such as CLTD or RTS.
Rules of thumb vary a lot with glazing, people and fresh air, which is why this calculator works from the actual room data. See the guide Cooling load: rules of thumb vs. a proper estimate.
Yes. Enter the fresh-air flow, or let the calculator take it from the room data. Its sensible and latent load is added using the outdoor and indoor conditions.
FAHU Capacity · Psychrometric Calculator · Duct Sizer · Cooling load guide
Results are for preliminary design. Verify final selections against project specifications, applicable codes and manufacturer data.