1. What is a BTU Calculator for Radiators?

Definition: This calculator estimates the required British Thermal Units (BTU) for radiators based on room volume.

Purpose: It helps homeowners and heating professionals determine the appropriate radiator size for UK rooms.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( BTU \) — British Thermal Units per hour (BTU/h)
• \( Room\ Volume \) — Volume of the room in cubic feet (ft³)

Explanation: The standard UK calculation uses 5 BTU per cubic foot as a baseline for radiator sizing.

3. Importance of BTU Calculation

Details: Proper BTU estimation ensures efficient heating, prevents under or over-sizing radiators, and maintains comfortable room temperatures.

4. Using the Calculator

Tips: Enter the room volume in cubic feet (length × width × height). The value must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why multiply by 5?
A: This is the standard UK multiplier for average insulation and typical room conditions.

Q2: When should I adjust the multiplier?
A: Use 6 for poorly insulated rooms, 4 for well-insulated spaces, or 7-8 for conservatories.

Q3: How do I find room volume?
A: Measure length × width × height in feet. For example, 10ft × 12ft × 8ft = 960ft³.

Q4: Does this include heat loss factors?
A: The 5 multiplier accounts for average heat loss. For precise calculations, consider window area and wall insulation.

Q5: Is this suitable for all room types?
A: This provides a baseline estimate. Kitchens and bathrooms may require additional BTU calculations.