1. What is a Radiator Output Calculator?

Definition: This calculator estimates the heat output of an existing radiator based on its dimensions and temperature difference.

Purpose: It helps HVAC professionals and homeowners determine the heating capacity of existing radiators for system evaluation or replacement planning.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• Output — Heat output (BTU or kW)
• Length — Radiator length (ft or m)
• Width — Radiator width (ft or m)
• Height Factor — Dimensionless factor accounting for radiator height
• ΔT — Temperature difference between radiator and room (°F or °C)

Explanation: The dimensions multiplied by height factor give the effective radiator surface area, which when multiplied by temperature difference gives heat output.

3. Importance of Radiator Output Calculation

Details: Proper output estimation ensures adequate heating capacity, energy efficiency, and proper system balancing.

4. Using the Calculator

Tips: Enter the radiator dimensions, height factor (default 1.0), and temperature difference. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is ΔT (Delta T)?
A: It's the difference between the radiator surface temperature and the desired room temperature.

Q2: How do I determine the height factor?
A: For standard radiators, use 1.0. For tall radiators, use 1.1-1.3. Consult manufacturer specifications for exact values.

Q3: What units should I use?
A: Use consistent units (all imperial or all metric) for accurate results.

Q4: How accurate is this calculation?
A: It provides a good estimate but actual output may vary based on radiator design, material, and water flow rate.

Q5: Can I use this for baseboard heaters?
A: The formula works similarly but may require different height factors for baseboard configurations.