BTU of Heating per Sq Ft

Heating BTU Formula:

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

Heating Requirement (BTU/h):

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1. What is BTU of Heating per Sq Ft?

Definition: This calculator estimates the heating requirement in BTUs based on area and BTU per square foot values.

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

2. How Does the Calculator Work?

The calculator uses the formula:

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

Where:

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

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

3. Importance of Heating Calculation

Details: Proper heating estimation ensures comfortable indoor temperatures, energy efficiency, and correct HVAC system sizing.

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: Most spaces use 20 BTU/h per square foot, but this varies by climate (30-40 BTU/h·ft² in cold climates, 10-15 in mild climates).

Q2: How do I adjust for room type?
A: Multiply by factors: 1.25 for kitchens, 1.5 for bathrooms, 1.1 for bedrooms.

Q3: Does this include heat loss factors?
A: No, this is a basic calculation. For precise results, consider insulation, windows, and ceiling height.

Q4: How do I convert to other units?
A: 1 BTU/h = 0.293 watts. For kW, divide BTU/h by 3412.

Q5: Should I add a safety margin?
A: Yes, HVAC professionals typically add 10-20% to the calculated value.