1. What is a Heating Load Calculator?

Definition: This calculator estimates the heating load in BTUs per hour based on area, BTU per square foot, and adjustment factors.

Purpose: It helps HVAC professionals and homeowners determine the heating capacity needed for a space.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q \) — Heating load (BTU/h)
• \( A \) — Area to be heated (square feet)
• \( \text{BTU/ft}^2 \) — Heat loss/gain per square foot
• \( F \) — Adjustment factor for climate and insulation

Explanation: The area is multiplied by the base BTU requirement and then adjusted for specific conditions.

3. Importance of Heating Load Calculation

Details: Proper heating load estimation ensures comfortable temperatures, energy efficiency, and proper sizing of heating equipment.

4. Using the Calculator

Tips: Enter the area in square feet, BTU per square foot (default 20), and adjustment factor (default 1.2). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical BTU/ft² value?
A: For moderate climates, 20 BTU/ft² is common. Colder climates may need 30-50 BTU/ft².

Q2: How is the factor determined?
A: The factor accounts for insulation (1.0-1.5), climate (1.0-2.0), and building type.

Q3: Does this include heat loss through windows?
A: No, for precise calculations, window heat loss should be calculated separately and added.

Q4: How do I convert BTU/h to other units?
A: 1 BTU/h = 0.293 watts. For tons of cooling, divide BTU/h by 12,000.

Q5: Should I round up the result?
A: Yes, it's recommended to round up to the nearest equipment size available.