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HVACIQ
FREE TOOL · TRADIEROLES.COM
Design cooling load0.00kW
Sensible / latent0.0 / 0.0 kW
SHR
W/m²

Site & conditions

Location presets are typical summer design conditions — edit for your site or contract conditions.

Room, walls & roof

Add each external wall with its area and sun exposure. Internal walls to conditioned space carry no load.

Glazing

Orientation is where the glass faces (southern hemisphere — north gets midday sun). Shade factor: 1.0 = no shading, 0.6 = eaves/awning, 0.3 = full external shade.

People, equipment & air

Ventilation guide: ~10 L/s per person for offices. Sensible/latent per person set by activity (typical values, editable via activity choice).

Load summary

Component heat gain method: fabric U×A×ΔT with solar-air allowance on sunlit surfaces, glazing conduction + solar (peak orientation factors × SHGC × shade), occupancy, lighting, equipment, and ventilation/infiltration with real psychrometics for latent load. Preliminary sizing — verify to AIRAH DA9 / full dynamic calculation for contract work.