Size a commercial HVAC system from floor area, occupancy, and load factors
Area Check
OFF
Ceiling Ht
OFF
Occupancy
OFF
Heat Load
OFF
Delta-T
OFF
Tonnage
OFF
CFM Calc
OFF
Equipment
OFF
Inputs
Preset heat-load and occupancy defaults per type
Average clear height from floor to ceiling
Leave blank if using SF/person below
Used if Occupants field is empty
Total sensible + latent load factor for the space
Indoor setpoint minus outdoor design temperature
Results
Enter inputs above and click Calculate
Room Volume—
Occupancy Density—
Total Heat Gain—
Recommended Tonnage—
Supply Air CFM—
Air Changes / Hour—
BTU/hr per Ton12 000constant
Equipment Recommendation
—
Recommendations are estimates for preliminary sizing only. Final equipment selection requires a detailed block-load or zone-by-zone analysis per ASHRAE 90.1 / ACCA Manual N.