Radiant Heat BTU per Square Foot

Radiant Heat Formula:

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

Total Heat Output (Q): BTU/h

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1. What is Radiant Heat BTU per Square Foot?

Definition: This calculator determines the total heat output needed for radiant heating systems based on area and BTU requirements per square foot.

Purpose: It helps HVAC professionals and homeowners properly size radiant heating systems for optimal comfort and efficiency.

2. How Does the Calculator Work?

The calculator uses the formula:

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

Where:

\( Q \) — Total heat output (BTU/hour)
\( A \) — Area to be heated (square feet)
\( \text{BTU/ft}^2 \) — Heat requirement per square foot (BTU/hour·ft²)

Explanation: The area is multiplied by the required heat intensity to determine the total heating capacity needed.

3. Importance of Proper BTU Calculation

Details: Accurate calculations ensure comfortable temperatures, energy efficiency, and prevent system over/under sizing.

4. Using the Calculator

Tips: Enter the area in square feet and BTU requirement per square foot (default 30 BTU/h·ft² for typical spaces). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical BTU/ft² value?
A: Most residential spaces need 25-35 BTU/h·ft², but this varies by climate, insulation, and room type.

Q2: How does this differ for different rooms?
A: Bathrooms may need 40-50 BTU/h·ft², while bedrooms might only need 20-25 BTU/h·ft².

Q3: What factors affect BTU requirements?
A: Insulation quality, ceiling height, window area, and outdoor temperatures all impact needs.

Q4: How do I calculate for whole house systems?
A: Calculate each room separately, then sum the totals for whole-house requirements.

Q5: Does this account for heat loss?
A: The BTU/ft² value should already account for typical heat loss when properly selected.