1. What is a Radiator Size Calculator?

Definition: This calculator estimates the required radiator size (in Watts) based on room dimensions and insulation factors.

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:

• \( Q \) — Required radiator size (Watts)
• \( W \) — Room width (meters)
• \( L \) — Room length (meters)
• \( H \) — Room height (meters)
• \( F \) — Room factor (Watts per cubic meter)

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

3. Importance of Proper Radiator Sizing

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

4. Using the Calculator

Tips: Enter room dimensions in meters. The default room factor is 50 W/m³ (average for moderately insulated rooms). Adjust the factor based on:

• 35 W/m³ - Well insulated rooms
• 50 W/m³ - Average insulation
• 75 W/m³ - Poor insulation or very cold climates

5. Frequently Asked Questions (FAQ)

Q1: Why is room height important?
A: Heat rises, so taller rooms require more heating capacity to maintain comfortable temperatures at floor level.

Q2: What if my room has large windows?
A: Increase the room factor by 10-20% for rooms with significant glass areas or north-facing exposures.

Q3: How accurate is this calculation?
A: It provides a good estimate but consider professional assessment for complex spaces or whole-house systems.

Q4: Should I round up the radiator size?
A: Yes, it's generally recommended to round up to the nearest standard radiator size available.

Q5: Does this account for room usage?
A: No, bathrooms may need 10-15% more capacity, while bedrooms may need slightly less than calculated.