AC Calculator for Room

AC Power Formula:

\[ P_{kW} = \frac{A_{room} \times 44.6}{3412 \times EER} \]

AC Power (kW):

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is an AC Calculator for Room?

Definition: This calculator estimates the required air conditioner power (in kW) based on room area and the unit's Energy Efficiency Ratio (EER).

Purpose: It helps homeowners and HVAC professionals determine the appropriate AC size for optimal cooling and energy efficiency.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ P_{kW} = \frac{A_{room} \times 44.6}{3412 \times EER} \]

Where:

\( P_{kW} \) — AC power requirement (kilowatts)
\( A_{room} \) — Room area (square meters)
\( EER \) — Energy Efficiency Ratio (dimensionless)

Explanation: The formula converts the cooling load (based on area) to kW while accounting for the unit's efficiency.

3. Importance of Proper AC Sizing

Details: Correct AC sizing ensures efficient operation, prevents short cycling, maintains comfort, and reduces energy costs.

4. Using the Calculator

Tips: Enter the room area in square meters and the AC unit's EER rating (default 3.5). Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is EER?
A: Energy Efficiency Ratio measures cooling output (BTU/h) divided by power input (W) under standard conditions.

Q2: What's a typical EER rating?
A: Standard units range 8-12 EER, while high-efficiency models can reach 12+ EER. The calculator uses the ratio directly (divide label EER by 3.41).

Q3: Why 44.6 in the formula?
A: This represents the approximate cooling load in BTU/h per square meter for standard conditions.

Q4: Should I round up the result?
A: Yes, consider rounding up to the nearest standard AC unit size (0.5kW increments typically).

Q5: Does this account for room height?
A: No, this assumes standard ceiling heights. For taller rooms, multiply area by (height/2.4).