1. What is EER?

The Energy Efficiency Ratio (EER) is a measure of how efficiently a cooling system operates when the outdoor temperature is at a specific level (usually 95°F). It's calculated by dividing the cooling capacity (in BTU/h) by the power input (in watts).

2. How Does the Calculator Work?

The calculator uses the EER formula:

Where:

• Cooling Capacity — Measured in British Thermal Units per hour (BTU/h)
• Power Input — Measured in Watts

Explanation: Higher EER values indicate more efficient air conditioning systems when operating at the rated conditions.

3. Importance of EER Calculation

Details: EER helps consumers compare the energy efficiency of different HVAC systems. A higher EER rating means the system uses less energy to produce the same cooling effect, resulting in lower energy costs.

4. Using the Calculator

Tips: Enter the cooling capacity in BTU/h and power consumption in watts. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is a good EER rating?
A: Generally, an EER of 10 or higher is considered good, with premium systems reaching 12 or more.

Q2: How does EER differ from SEER?
A: EER measures efficiency at one operating condition (95°F), while SEER (Seasonal EER) averages efficiency over an entire cooling season.

Q3: Why is EER important?
A: EER helps estimate operating costs - a system with higher EER will cost less to operate for the same cooling output.

Q4: Can EER be too high?
A: Extremely high EER systems may have higher upfront costs, so the optimal EER depends on your climate and usage patterns.

Q5: Does EER change with temperature?
A: Yes, EER typically decreases as outdoor temperature increases beyond the rated condition.