1. What is a Home Heating Load Calculator?

Definition: This calculator determines the heating load required to maintain comfortable indoor temperatures based on heat loss and heat gains.

Purpose: It helps homeowners, HVAC professionals, and builders properly size heating systems for optimal efficiency and comfort.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( \text{Load} \) — Required heating capacity (Watts)
• \( \text{Heat Loss} \) — Total heat loss through walls, windows, etc. (Watts)
• \( \text{Gains} \) — Heat gains from appliances, solar radiation, etc. (Watts)

Explanation: The net heating load is calculated by subtracting any internal or solar heat gains from the total heat loss of the building.

3. Importance of Heating Load Calculation

Details: Accurate heating load calculation ensures proper HVAC system sizing, energy efficiency, and prevents under/over heating issues.

4. Using the Calculator

Tips: Enter the total heat loss and heat gains in Watts. Both values must be ≥ 0. The result shows the net heating load required.

5. Frequently Asked Questions (FAQ)

Q1: What is included in heat loss?
A: Heat loss includes conduction through walls/roof, infiltration, ventilation, and temperature difference with outdoors.

Q2: What are typical heat gains?
A: Gains include solar radiation through windows, body heat from occupants, and heat from appliances/lighting.

Q3: Why might my result be zero?
A: If gains equal or exceed heat loss, the calculator shows zero as no additional heating is needed.

Q4: How do I find my home's heat loss?
A: Use our Heat Loss Calculator or consult an energy auditor for professional assessment.

Q5: Should I add a safety factor?
A: Many professionals add 10-20% to the calculated load for extreme weather conditions.