About the Cooling Load Estimator Online Free Tool

The Cooling Load Estimator Online Free Tool gives a simplified sensible cooling load from floor area, U-value, temperature difference, occupants, lighting, and equipment gains. It is useful for rough HVAC capacity checks.

How to Use the Cooling Load Estimator Online

1. Enter the required inputs in the fields above using the units shown on the labels.
2. Select any mode, shape, or method options so the calculation matches your scenario.
3. Run the calculation and review the result summary in the output panel.
4. Check the units, assumptions, and project requirements before using the result outside preliminary review.

Choosing Options Correctly

The envelope load uses area, U-value, and temperature difference. People are estimated at 75 W sensible each, while lighting and equipment are entered directly in watts.

Common Use Cases

• Estimate an early cooling load in kW and tons of refrigeration.
• Compare envelope and internal gain assumptions.
• Screen whether a space is in the expected HVAC capacity range.

Quick FAQ

Does this replace a Manual J or detailed load model?
No. It is a quick sensible cooling estimate, not a full building load calculation.

What is TR?
TR means tons of refrigeration. One TR is commonly treated as 12,000 BTU/h.

What affects real cooling load?
Envelope, solar gain, ventilation, humidity, occupancy, equipment, schedules, and climate all affect actual load.

Should I oversize equipment from this result?
No. Oversizing can cause poor humidity control and cycling. Use proper design calculations before selecting equipment.