HVAC Load Calculator
Accurate HVAC sizing ensures comfort, reduces energy bills, and protects system life.
This HVAC Load Calculator estimates: 1. Cooling load (BTU/hr), 2. Heating load (BTU/hr), 3. Recommended HVAC tonnage . Useful for HVAC technicians, designers, facility managers, architects, and homeowners.
Estimate Cooling & Heating Requirements
Enter the room area in sq ft.
Enter ceiling height in feet.
Enter the total number of people normally in the room.
Enter the number of heat-generating appliances.
Click Calculate HVAC Load.
The calculator instantly shows:
Total Cooling Load (BTU/hr)
Total Heating Load (BTU/hr)
Recommended HVAC tonnage
🧭 How to Use
FAQ
Q1. What is HVAC load?
A. It is the amount of heating or cooling required to maintain desired indoor temperature.
Q2. Why is HVAC load important?
A. Correct sizing saves energy, improves comfort, and prevents compressor overloading.
Q3. What is BTU/hr?
A. British Thermal Unit per hour — the standard unit for heating and cooling load.
Q4. What is tonnage?
A. 1 Ton = 12,000 BTU/hr. Used to size AC units.