This module takes you step-by-step into Heat Load Calculation, one of the most essential skills for every HVAC engineer. You’ll learn how to break down cooling load components — walls, windows, roof, infiltration, lighting, equipment, and people — and apply formulas with confidence. I have covered the thumb rules for quick estimates, psychrometric considerations, and how to validate your results in practice.

By the end of this module, you’ll be able to:

1. Understand and apply the fundamental heat transfer equations.
2. Calculate sensible and latent loads (including infiltration & ventilation).
3. Use lighting power density (LPD), occupancy, and equipment gains in your load sheet.
4. Apply the quick TR estimation thumb rules for faster project sizing.
5. Interpret results in kW/TR and translate them into system requirements.
6. Finally, you will be able to perform a heat load calculation manually.