1. What is a Heat BTU per Square Foot Calculator?

Definition: This calculator estimates the heat load in BTUs based on area and BTU requirements per square foot.

Purpose: It helps HVAC professionals and homeowners determine heating requirements for spaces.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q \) — Heat load (BTU/h)
• \( A \) — Area (square feet)
• \( \text{BTU/ft}^2 \) — BTU requirement per square foot (BTU/h·ft²)

Explanation: The area is multiplied by the BTU requirement per square foot to get total heating load.

3. Importance of Heat Load Calculation

Details: Proper heat load estimation ensures adequate heating system sizing, energy efficiency, and comfort.

4. Using the Calculator

Tips: Enter the area in square feet and BTU per square foot (default 20 BTU/h·ft²). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical BTU per square foot value?
A: For residential spaces, 20 BTU/h·ft² is common, but this varies by climate and insulation.

Q2: How does ceiling height affect this calculation?
A: Higher ceilings may require adjusting the BTU/ft² value upward to account for larger volume.

Q3: Should I use this for whole-house calculations?
A: For whole-house, calculate each room separately as BTU needs vary by room type.

Q4: How do I account for windows and insulation?
A: Adjust the BTU/ft² value (higher for many windows/poor insulation, lower for good insulation).

Q5: Does this include safety factors?
A: No, HVAC professionals typically add 10-20% to the calculated load for safety margin.