Square Foot BTU Calculator

BTU Calculation Formula:

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

Heating/Cooling Load (Q): BTU/h

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

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

The calculator uses the formula:

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

Where:

Explanation: The area is multiplied by the BTU requirement per square foot to determine the total heating or cooling capacity needed.

Details: Proper BTU calculation ensures efficient HVAC system sizing, energy efficiency, and optimal comfort levels.

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.

Q1: What's a typical BTU/ft² value?
A: For cooling, 20 BTU/ft² is common; heating may require 30-40 BTU/ft² in cold climates.

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

Q3: Should I adjust for room type?
A: Yes - kitchens may need +4,000 BTU, bathrooms +1,000 BTU, and bedrooms may need less.

Q4: How does insulation affect BTU needs?
A: Well-insulated spaces may need 10-15% less BTU, while poorly insulated spaces may need more.

Q5: Does this include climate factors?
A: No, climate adjustments should be made to the BTU/ft² value before calculation.