How To Calculate Heating And Cooling Loads

Calculating heating and cooling loads is crucial for designing efficient HVAC systems. This calculator helps you estimate loads based on square footage, insulation, and occupancy.

1. Select the square footage of your space.
2. Choose the insulation type.
3. Enter the number of occupants.
4. Click ‘Calculate’.

The calculator uses the ASHRAE Fundamentals Handbook method to estimate loads:

Load = (Square Footage * Occupancy * 400) / Insulation

Comparison of Loads for Different Insulation Types

Square Footage	Occupancy	R-13	R-19	R-30
1,000 sq ft	4	1,600 BTU	1,200 BTU	960 BTU

• Consider regional climate when choosing insulation.
• Incorporate natural lighting and ventilation for energy savings.
• Regularly maintain your HVAC system for optimal performance.

What is a BTU?

A British Thermal Unit (BTU) is a unit of heat equal to about 1,055 joules.

For more information, see the U.S. Department of Energy and the ASHRAE Handbook.