1. What is Radiator Sizing?

Radiator sizing is the process of determining the appropriate length of radiator needed to adequately heat a room based on the room's heat load and the radiator's output capacity per meter.

2. How Does the Calculator Work?

The calculator uses the radiator sizing formula:

Where:

• \( Size \) — Radiator length in meters
• \( Load \) — Room heat load in kilowatts (kW)
• \( Output \) — Radiator output per meter in watts (W/m)
• \( m \) — Meter conversion factor

Explanation: The formula calculates the required radiator length by dividing the room's total heat load by the radiator's output capacity per meter, with appropriate unit conversions.

3. Importance of Proper Radiator Sizing

Details: Correct radiator sizing ensures efficient heating, prevents energy waste, maintains comfortable room temperatures, and extends the lifespan of heating systems.

4. Using the Calculator

Tips: Enter room load in kW and radiator output in W/m. Standard output for UK sizing is 150 W/m at ΔT50. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is room heat load?
A: Room heat load is the amount of heat energy required to maintain a comfortable temperature in a room, accounting for heat loss through walls, windows, and ventilation.

Q2: What is standard output per meter?
A: For UK sizing, the standard output is 150 W per meter at ΔT50 (50°C temperature difference between radiator and room).

Q3: How do I calculate room heat load?
A: Room heat load can be calculated using room dimensions, insulation levels, window areas, and local climate data, typically done by heating engineers.

Q4: What factors affect radiator output?
A: Radiator output depends on radiator type, material, water temperature, room temperature, and installation location.

Q5: Can I use this for underfloor heating?
A: This calculator is designed for standard radiators. Underfloor heating requires different calculations due to different heat distribution characteristics.