1. What is a Heat Pump Radiator Size Calculator?

Definition: This calculator determines the appropriate radiator size (in kW) needed for heat pump systems based on the heat demand and the system's coefficient of performance (COP).

Purpose: It helps HVAC professionals and homeowners properly size radiators for efficient heat pump operation.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( kW \) — Required radiator size (kilowatts)
• \( \text{Heat Demand} \) — Total heat requirement of the space (kW)
• \( COP \) — Coefficient of Performance of the heat pump (dimensionless)

Explanation: The heat demand is divided by the COP to account for the higher efficiency of heat pumps compared to traditional heating systems.

3. Importance of Proper Radiator Sizing

Details: Correct radiator sizing ensures efficient heat distribution, optimal system performance, and energy savings with heat pump systems.

4. Using the Calculator

Tips: Enter the heat demand in kW and the COP of your heat pump (default 3.5). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is COP in heat pump systems?
A: COP (Coefficient of Performance) measures heat pump efficiency - the ratio of heat output to electrical energy input.

Q2: What's a typical COP value?
A: Modern heat pumps typically have COPs between 3.0-4.5, but check your specific model's specifications.

Q3: How do I find my heat demand?
A: Heat demand can be calculated through heat loss calculations or obtained from building energy assessments.

Q4: Why are heat pump radiators sized differently?
A: Heat pumps operate at lower temperatures than boilers, so radiators need larger surface areas to emit the same heat.

Q5: Should I round up the calculated size?
A: Yes, it's recommended to round up to the nearest standard radiator size for safety margin.