1. What is Heat Pump Sizing?

Heat pump sizing determines the appropriate capacity (in kW) needed to efficiently heat a room based on its area and insulation characteristics. Proper sizing ensures optimal performance and energy efficiency.

2. How Does the Calculator Work?

The calculator uses the heat pump sizing formula:

Where:

• \( Area \) — Room area in square meters
• \( Factor \) — Heating factor in watts per square meter (typically 50-100 W/m²)
• 1000 — Conversion factor from watts to kilowatts

Explanation: The heating factor accounts for room insulation quality and climate conditions, with higher values for poorer insulation or colder climates.

3. Importance of Proper Sizing

Details: Correct heat pump sizing prevents energy waste (oversizing) and insufficient heating (undersizing). Properly sized units operate more efficiently and last longer.

4. Using the Calculator

Tips: Measure room dimensions accurately. Typical heating factors: 50-65 W/m² (well insulated), 70-85 W/m² (average), 90-100+ W/m² (poor insulation/cold climate).

5. Frequently Asked Questions (FAQ)

Q1: What's a typical heating factor for modern homes?
A: Well-insulated modern homes typically use 50-65 W/m², while older homes may need 70-85 W/m².

Q2: Should I round up the calculated size?
A: Heat pumps come in standard sizes. Round up to the nearest available unit size, but avoid significantly oversizing.

Q3: Does room height affect the calculation?
A: Standard calculations assume 2.4-2.7m ceilings. For higher ceilings, increase the heating factor accordingly.

Q4: What about rooms with lots of windows?
A: Increase the heating factor by 10-20% for rooms with large or poorly insulated windows.

Q5: Should I use this for whole-house sizing?
A: For whole-house calculations, perform room-by-room calculations and sum the results, or consult an HVAC professional.