1. What is an Underfloor Heating BTU Calculator?

Definition: This calculator estimates the British Thermal Units (BTU) required for underfloor heating based on the area and BTU per square foot.

Purpose: It helps homeowners and heating professionals determine the heating capacity needed for efficient underfloor heating systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( BTU \) — Heating capacity (BTU per hour)
• \( Area \) — Floor area (square feet)
• \( BTU\ per\ sq\ ft \) — Heating requirement per square foot (typically 20-30 BTU/h sq ft)

Explanation: The total heating requirement is calculated by multiplying the floor area by the required heating intensity per square foot.

3. Importance of BTU Calculation

Details: Proper BTU calculation ensures efficient heating, prevents energy waste, and helps select the right heating system capacity.

4. Using the Calculator

Tips: Enter the floor area in square feet and BTU per square foot (default 25 BTU/h sq ft). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical BTU per sq ft for underfloor heating?
A: Typically 20-30 BTU/h sq ft, with 25 as a common default value for moderate climates.

Q2: How do I measure the area accurately?
A: Measure length × width of each room, then sum all areas to be heated.

Q3: When would I need higher BTU per sq ft?
A: In colder climates, poorly insulated spaces, or rooms with high heat loss (e.g., rooms with large windows).

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

Q5: How does this relate to kW for electric systems?
A: 1 kW ≈ 3412 BTU/h. Divide BTU result by 3412 to get kW requirement.