BTU Heater per Square Foot Calculator

BTU per Square Foot Formula:

\[ Q = A \times \text{BTU/ft}^2 \]

Total Heating Capacity (BTU/h):

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

Definition: This calculator estimates the heating capacity needed (in BTU/h) based on the area to be heated and the required BTU per square foot.

Purpose: It helps homeowners and HVAC professionals determine the appropriate heater size for a given space.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ Q = A \times \text{BTU/ft}^2 \]

Where:

\( Q \) — Total heating capacity (BTU/h)
\( A \) — Area to be heated (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 determine the total heating capacity needed.

3. Importance of Proper Heating Calculation

Details: Accurate BTU calculation ensures efficient heating, prevents energy waste, and maintains comfortable temperatures.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What's a typical BTU per square foot requirement?
A: Typically 20 BTU/h·ft² for moderate climates, 30-40 for colder regions, and 10-15 for warmer areas.

Q2: How does ceiling height affect the calculation?
A: For ceilings over 8 feet, multiply the result by (ceiling height ÷ 8).

Q3: Should I adjust for windows or insulation?
A: Yes, increase BTU by 10% for poor insulation or many windows, decrease by 10% for excellent insulation.

Q4: Is this calculation for central heating or space heaters?
A: This applies to both, though space heaters may need separate calculations for each room.

Q5: How do I convert BTU to watts?
A: Divide BTU/h by 3.412 to get watts (1W = 3.412 BTU/h).