1. What is a Heat Pump kW per m² Calculator?

Definition: This calculator estimates the power requirement (in kW) for a heat pump based on the area to be heated and the wattage per square meter.

Purpose: It helps homeowners and HVAC professionals determine the appropriate heat pump size for a given space.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P \) — Heat pump power (kW)
• \( A \) — Area to be heated (square meters)
• \( \frac{W}{m²} \) — Wattage per square meter (typically 100 W/m² for residential)

Explanation: The area is multiplied by the wattage per square meter to get total watts, which is then converted to kilowatts.

3. Importance of Proper Heat Pump Sizing

Details: Correct sizing ensures efficient operation, prevents short cycling, and maximizes the heat pump's lifespan.

4. Using the Calculator

Tips: Enter the area in square meters and wattage per square meter (default 100 W/m²). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical W/m² value for homes?
A: Most homes require 80-120 W/m², with 100 W/m² being a common baseline.

Q2: How does insulation affect the calculation?
A: Well-insulated homes may need as little as 50 W/m², while poorly insulated spaces may need 150 W/m² or more.

Q3: Should I round up the calculated kW?
A: Yes, heat pumps come in standard sizes, so round up to the nearest available unit size.

Q4: Does this account for climate differences?
A: No, adjust W/m² values higher for colder climates and lower for milder climates.

Q5: How accurate is this calculation?
A: This provides a rough estimate. A professional Manual J calculation is recommended for precise sizing.