1. What is an Underfloor Heating Output Calculator?

Definition: This calculator estimates the thermal output of an underfloor heating system based on floor area and power density.

Purpose: It helps homeowners, architects, and heating engineers determine the heating capacity required for comfortable room temperatures.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Output \) — Total heating output (Watts)
• \( Area \) — Floor area (square meters)
• \( \frac{W}{m^2} \) — Power density (Watts per square meter)

Explanation: The floor area is multiplied by the required power density to determine the total heating capacity needed.

3. Importance of Underfloor Heating Calculation

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

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What's a typical W/m² value for underfloor heating?
A: Residential spaces typically use 100-150 W/m², while bathrooms may need 150-200 W/m².

Q2: How does floor covering affect the output?
A: Thick carpets or insulating materials may require higher power densities to achieve the same room temperature.

Q3: Should I include furniture area in calculations?
A: No, calculate only the exposed floor area where heating elements will be installed.

Q4: How does this relate to room heat loss?
A: The output should match or exceed the room's heat loss, which depends on insulation, windows, and outdoor temperature.

Q5: What about different room types?
A: Bathrooms typically need higher output (150-200 W/m²) than living spaces (100-150 W/m²).