1. What is a Radiator Size Calculator?

Definition: This calculator determines the required radiator size in kilowatts (kW) based on room heat loss and temperature difference (Delta T).

Purpose: It helps homeowners and heating engineers select properly sized radiators for efficient room heating.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( kW \) — Radiator size (kilowatts)
• \( \text{Room Heat Loss} \) — Heat loss of the room (kW)
• \( \Delta T \) — Temperature difference between flow and return (°C)

Explanation: The room's heat loss is divided by the temperature difference to determine the required radiator output.

3. Importance of Proper Radiator Sizing

Details: Correct radiator sizing ensures efficient heating, prevents energy waste, and maintains comfortable room temperatures.

4. Using the Calculator

Tips: Enter the room heat loss in kW and Delta T (default 50°C). Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is Delta T in radiator calculations?
A: Delta T is the temperature difference between the flow and return water temperatures in the heating system.

Q2: What's a typical Delta T value?
A: Standard systems use 50°C, while modern condensing boilers might use 30-40°C.

Q3: How do I find my room's heat loss?
A: Use a heat loss calculator or consult a heating engineer for accurate measurements.

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

Q5: Does this account for room insulation?
A: The heat loss value should already account for insulation quality in your calculation.