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 and heating professionals determine the heating capacity needed for comfortable room temperatures.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• Output — Total heating capacity (Watts)
• Area — Floor area to be heated (square meters)
• W per m² — Power density (Watts per square meter)

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

3. Importance of Heating Output 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 the required power density (default 100 W/m²). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical W/m² value for underfloor heating?
A: Most residential systems use 100-150 W/m², depending on insulation and climate.

Q2: How do I measure the area accurately?
A: Measure length × width of the heated space, excluding fixed furniture or cabinets.

Q3: When would I need higher W/m² values?
A: In poorly insulated rooms, bathrooms (for faster warm-up), or in colder climates.

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

Q5: How does this relate to boiler sizing?
A: The total output for all zones should match your boiler's capacity (with some margin).