1. What is a Cooling Load Calculator?

Definition: This calculator estimates the total cooling load by summing heat transfer through conduction, ventilation, and internal heat gains.

Purpose: It helps HVAC professionals and engineers determine the cooling capacity needed for a space.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Load \) — Total cooling load (Watts)
• \( Q_{conduction} \) — Heat transfer through walls, roof, windows (W)
• \( Q_{ventilation} \) — Heat from air exchange (W)
• \( Q_{gains} \) — Internal heat from people, equipment, lighting (W)

Explanation: The total cooling load is the sum of all heat sources affecting the space temperature.

3. Importance of Cooling Load Calculation

Details: Accurate cooling load estimation ensures proper HVAC system sizing, energy efficiency, and occupant comfort.

4. Using the Calculator

Tips: Enter each component of heat gain in watts. All values must be ≥ 0. Use separate tools to calculate each Q component if needed.

5. Frequently Asked Questions (FAQ)

Q1: What's included in Q_conduction?
A: Heat transfer through building envelope - walls, roof, windows, doors, based on U-values and temperature differences.

Q2: How is Q_ventilation calculated?
A: Typically calculated as 1.2 × airflow rate (m³/s) × temperature difference × 1000.

Q3: What contributes to Q_gains?
A: People (100W/person), equipment (rated power), lighting, and other internal heat sources.

Q4: Should I add a safety factor?
A: Yes, HVAC systems typically add 10-20% safety factor to the calculated load.

Q5: How does this differ from heating load?
A: Heating load considers heat losses, while cooling load considers heat gains to the space.