1. What is an Underfloor Heating BTU Calculator?

Definition: This calculator estimates the heating load required for underfloor heating systems based on floor area, BTU requirements, and floor type factors.

Purpose: It helps HVAC professionals and homeowners determine the appropriate heating capacity for radiant floor systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q \) — Heating load (BTU/hour)
• \( A \) — Floor area (square feet)
• \( \text{BTU/ft}^2 \) — Heat requirement per square foot
• \( F_f \) — Floor factor (adjustment for floor type)

Explanation: The floor area is multiplied by the BTU requirement per square foot, then adjusted by a factor that accounts for different floor constructions.

3. Importance of Accurate BTU Calculation

Details: Proper heating load estimation ensures comfortable temperatures, energy efficiency, and prevents system over/under-sizing.

4. Using the Calculator

Tips: Enter the floor area in square feet, typical BTU requirement (default 25 BTU/h·ft²), and floor factor (default 1.0 for concrete). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical BTU/ft² value?
A: Most residential spaces need 20-30 BTU/h·ft², but this varies by climate and insulation.

Q2: How do I determine the floor factor?
A: Use 1.0 for concrete, 0.9 for tile, 1.1 for wood, and 1.2 for carpeted floors.

Q3: Does this include heat loss calculations?
A: No, this is a basic calculator. For precise results, consider professional heat loss analysis.

Q4: Can I use this for commercial spaces?
A: Yes, but commercial spaces often require higher BTU values (35-50 BTU/h·ft²).

Q5: How does ceiling height affect the calculation?
A: This calculator assumes standard 8-9 ft ceilings. For higher ceilings, increase BTU/ft² values.