1. What is a Radiator Size Calculator?

Definition: This calculator estimates the required radiator size in BTUs based on room volume and heating factor.

Purpose: It helps homeowners and heating professionals determine the appropriate radiator size for efficient room heating.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( BTU \) — Radiator output (British Thermal Units)
• \( V \) — Room volume (cubic feet)
• \( F \) — Heating factor (BTU per cubic foot)

Explanation: The room volume is multiplied by a heating factor that accounts for insulation quality and climate conditions.

3. Importance of Proper Radiator Sizing

Details: Correct radiator sizing ensures efficient heating, energy savings, and prevents under- or over-heating of spaces.

4. Using the Calculator

Tips: Enter the room volume in cubic feet and heating factor (default 5 BTU/ft³). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: How do I calculate room volume?
A: Multiply room length × width × height in feet. For irregular rooms, divide into rectangular sections.

Q2: What heating factor should I use?
A: Standard is 5 BTU/ft³. Use 3-4 for well-insulated rooms, 6-7 for poor insulation or very cold climates.

Q3: Does this account for windows and doors?
A: The heating factor compensates for these. Add 10% extra BTU for large glass areas or north-facing rooms.

Q4: What if my room has high ceilings?
A: Calculate actual volume but consider that heat rises. You may use a slightly lower factor (e.g., 4 instead of 5).

Q5: How do I convert BTU to radiator size?
A: Radiators are typically rated in BTU/hr. Match the calculated BTU to radiator specifications.