1. What is Cooling Load Calculation?

Cooling load calculation in HVAC refers to the process of determining the amount of cooling energy required to maintain comfortable indoor conditions. It accounts for both sensible heat (temperature change) and latent heat (moisture/humidity) components.

2. How Does the Calculator Work?

The calculator uses the fundamental cooling load formula:

Where:

• \( Q \) — Total cooling load (BTU/h)
• Sensible Gains — Heat that causes temperature change (BTU/h)
• Latent Gains — Heat associated with moisture/humidity (BTU/h)

Explanation: This formula represents the total thermal energy that must be removed from a space to maintain desired temperature and humidity levels.

3. Importance of Cooling Load Calculation

Details: Accurate cooling load calculation is essential for proper HVAC system sizing, energy efficiency, occupant comfort, and preventing system short-cycling or inadequate performance.

4. Using the Calculator

Tips: Enter sensible and latent gains in BTU/h. Both values must be non-negative. For comprehensive calculations, consider all heat sources including solar gain, occupancy, equipment, and infiltration.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between sensible and latent heat?
A: Sensible heat changes air temperature, while latent heat changes moisture content without changing temperature.

Q2: How do I determine sensible and latent gains?
A: These are typically calculated from building characteristics, occupancy, equipment, and environmental factors using specialized software or manual methods.

Q3: What is a typical range for cooling loads?
A: Cooling loads vary significantly based on climate, building size, insulation, and usage. Residential loads typically range from 12,000-60,000 BTU/h.

Q4: Why is accurate load calculation important?
A: Oversized systems short-cycle reducing efficiency and dehumidification, while undersized systems cannot maintain comfort conditions.

Q5: Should this calculator be used for final system design?
A: This provides a basic calculation. Professional HVAC design requires detailed Manual J or similar comprehensive calculations.