1. What is a Warehouse Heat Load Calculator?

Definition: This calculator estimates the total heat load for a warehouse based on building envelope properties, equipment, and lighting.

Purpose: It helps HVAC professionals and facility managers determine cooling requirements for warehouse spaces.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q \) — Total heat load (Watts)
• \( U \) — U-value of building envelope (W/m²K)
• \( A \) — Surface area of warehouse (m²)
• \( \Delta T \) — Temperature difference between inside and outside (Kelvin)
• \( E \) — Heat from equipment (Watts)
• \( L \) — Heat from lighting (Watts)

Explanation: The formula calculates conductive heat transfer through walls/roof plus internal heat gains from equipment and lighting.

3. Importance of Heat Load Calculation

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

4. Using the Calculator

Tips: Enter U-value (typical warehouse: 0.5-1.5 W/m²K), area, temperature difference, and internal heat sources. All values must be ≥ 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical U-value for warehouses?
A: Insulated metal panel warehouses typically have U-values between 0.5-1.5 W/m²K depending on insulation.

Q2: How do I find the temperature difference (ΔT)?
A: Subtract outside design temperature from desired indoor temperature (e.g., 35°C outside - 24°C inside = 11K ΔT).

Q3: Should I include people heat gain?
A: For warehouses with few occupants, it's often negligible, but add ~100W per person if significant.

Q4: How do I estimate equipment heat?
A: Use nameplate ratings or estimate as 30-70% of electrical input power depending on equipment type.

Q5: Does this include solar gain?
A: No, for warehouses with significant glazing or skylights, additional solar gain calculations are needed.