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

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

Purpose: It helps HVAC professionals and homeowners determine proper heating system sizing for spaces.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q \) — Heating 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 the total heating load.

3. Importance of Heating Load Calculation

Details: Proper heating load estimation ensures efficient system operation, comfort, and energy savings.

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/ft² value?
A: For moderate climates, 20 BTU/ft² is common. Colder climates may need 30-40 BTU/ft².

Q2: How does ceiling height affect this?
A: Higher ceilings require more heating. Multiply result by (ceiling height / 8) for adjustments.

Q3: Should I include windows in the area?
A: Yes, include the full floor area. Window heat loss is accounted for in the BTU/ft² value.

Q4: How do I convert BTU/h to tons?
A: Divide BTU/h by 12,000 (1 ton = 12,000 BTU/h).

Q5: Does this include safety factors?
A: No, consider adding 10-20% to the calculated load for system sizing.