1. What is a Heating Load Calculator?

Definition: This calculator estimates the heating load required for a space based on thermal properties and temperature difference.

Purpose: It helps HVAC professionals and building designers determine the heating requirements for buildings and rooms.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( \text{Load} \) — Total heating load (Watts)
• \( U \) — U-value (thermal transmittance in W/m²K)
• \( A \) — Area of the surface (m²)
• \( \Delta T \) — Temperature difference (Kelvin)
• \( \text{Ventilation} \) — Additional ventilation heat loss (Watts)

Explanation: The formula calculates heat loss through building elements and adds ventilation losses to determine total heating requirement.

3. Importance of Heating Load Calculation

Details: Accurate heating load calculations ensure proper HVAC system sizing, energy efficiency, and occupant comfort.

4. Using the Calculator

Tips: Enter the U-value, surface area, temperature difference, and any additional ventilation losses. All values must be ≥ 0.

5. Frequently Asked Questions (FAQ)

Q1: What is U-value?
A: U-value measures how well a building element conducts heat. Lower values mean better insulation.

Q2: How do I determine ΔT?
A: Subtract the desired indoor temperature from the design outdoor temperature (both in °C or K).

Q3: What's included in ventilation losses?
A: Heat loss from air changes, infiltration, or mechanical ventilation systems.

Q4: Should I add a safety factor?
A: Yes, consider adding 10-20% to the calculated load for system capacity.

Q5: How does this differ from cooling load?
A: Cooling load considers additional factors like solar gain and internal heat sources.