1. What is Underfloor Heating Output per m² Calculator?

Definition: This calculator estimates the heat output in BTU/h for underfloor heating systems based on floor area and power density.

Purpose: It helps HVAC professionals and homeowners determine the heating capacity needed for underfloor heating installations.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q \) — Heat output (BTU/h)
• \( A \) — Floor area (square meters)
• \( W/m² \) — Power density (Watts per square meter)
• \( 3.412 \) — Conversion factor from Watts to BTU/h

Explanation: The floor area is multiplied by the power density to get total Watts, then converted to BTU/h.

3. Importance of Heat Output Calculation

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

4. Using the Calculator

Tips: Enter the floor area in m² and power density (default 100 W/m²). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical power density for underfloor heating?
A: Most residential systems use 80-150 W/m² depending on insulation and climate.

Q2: Why convert to BTU/h?
A: BTU/h is a common unit for heating capacity, especially in North America.

Q3: How does floor covering affect the calculation?
A: Thick coverings may require higher power density - consult manufacturer specifications.

Q4: Can I use this for whole-house calculations?
A: Yes, sum the areas of all heated rooms for total system requirements.

Q5: Does this include heat loss calculations?
A: No, this is basic output. For accurate sizing, consider room heat loss calculations.