1. What is the Stelrad STARS Heat Loss Calculator?

Definition: This calculator estimates radiator size requirements based on heat loss calculations following Stelrad's STARS methodology.

Purpose: It helps heating engineers and installers determine appropriate radiator sizes for rooms based on calculated heat loss.

2. How Does the Calculator Work?

The calculator uses heat loss values calculated per Stelrad STARS tool:

Where:

• \( Q \) — Heat loss (Watts)
• Room Temperature — Desired indoor temperature (°C)
• Outside Temperature — Design external temperature (°C)

Explanation: The calculator adjusts radiator size based on temperature differentials to ensure proper heating capacity.

3. Importance of Accurate Heat Loss Calculation

Details: Proper heat loss estimation ensures comfortable room temperatures, energy efficiency, and correct radiator sizing.

4. Using the Calculator

Tips: Enter the heat loss value from STARS tool, desired room temperature (default 21°C), and design outside temperature (default -3°C).

5. Frequently Asked Questions (FAQ)

Q1: What is the Stelrad STARS tool?
A: STARS is Stelrad's professional radiator sizing tool that calculates room heat loss based on multiple factors.

Q2: Why are temperature inputs important?
A: The temperature differential affects radiator output; colder outside temps may require larger radiators.

Q3: How accurate is this calculator?
A: This provides estimates; for precise calculations, use the full STARS tool with all room parameters.

Q4: What factors affect heat loss?
A: Insulation, window area, room dimensions, exposure, and building materials all contribute.

Q5: Should I add a safety margin?
A: It's common practice to add 10-15% to the calculated radiator size for contingencies.