AC Power Formula:
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Definition: This calculator estimates the cooling power (in kW) required for an air conditioning system based on room volume and a cooling factor.
Purpose: It helps HVAC professionals and homeowners determine the appropriate AC unit size for a given space.
The calculator uses the formula:
Where:
Explanation: The room volume is multiplied by a standard cooling factor to estimate the AC power needed.
Details: Correct AC sizing ensures energy efficiency, proper cooling, and prevents system overwork or short-cycling.
Tips: Enter the room volume in cubic meters and cooling factor (default 0.035 kW/m³ for typical spaces). All values must be > 0.
Q1: What's a typical cooling factor value?
A: The standard is 0.035 kW/m³, but this can vary from 0.025 (well-insulated) to 0.05 (sunny/poorly insulated).
Q2: How do I calculate room volume?
A: Multiply room length × width × height in meters.
Q3: When should I adjust the cooling factor?
A: Increase for sunny rooms, high ceilings, or poor insulation. Decrease for shaded, well-insulated spaces.
Q4: Does this account for occupancy or appliances?
A: No, add 0.1-0.2 kW per person or major heat-producing appliance if significant.
Q5: How does this relate to BTU ratings?
A: 1 kW ≈ 3412 BTU. Multiply kW result by 3412 to get BTU requirements.