1. What is a Radiant Floor Heat Calculator?

Definition: This calculator estimates the heat output required for radiant floor heating systems based on floor area, BTU requirements, and adjustment 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:

• \( Q \) — Heat output (BTU per hour)
• \( A \) — Floor area (square feet)
• \( \text{BTU/ft}^2 \) — Heat requirement per square foot
• \( F_f \) — Adjustment factor for system efficiency

Explanation: The floor area is multiplied by the BTU requirement per square foot, then adjusted for system-specific factors.

3. Importance of Heat Output Calculation

Details: Proper heat output estimation ensures comfortable temperatures, energy efficiency, and correct system sizing.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What's a typical BTU per square foot value?
A: Most residential systems use 20-30 BTU/h·ft², depending on climate and insulation.

Q2: When would I change the adjustment factor?
A: Adjust for high ceilings (1.1-1.3), poor insulation (1.2-1.5), or commercial spaces (1.5-2.0).

Q3: How do I measure floor area accurately?
A: Measure length × width of each room, excluding permanent fixtures, and sum all areas.

Q4: Does this include heat loss calculations?
A: No, this is a basic calculator. For precise calculations, consult a professional heat loss analysis.

Q5: How does this relate to boiler sizing?
A: The total BTU/h output helps determine appropriate boiler capacity for the system.