1. What is Energy Efficiency Ratio (EER)?

Energy Efficiency Ratio (EER) is a measure of how efficiently a cooling system operates when the outdoor temperature is at a specific level. It represents the ratio of cooling capacity (in BTU/hr) to power input (in watts) for air conditioning and refrigeration equipment.

2. How Does the Calculator Work?

The calculator uses the EER formula:

Where:

• \( Cooling\ Capacity \) — The amount of heat removed by the system, measured in British Thermal Units per hour (BTU/hr)
• \( Power\ Input \) — The electrical power consumed by the system, measured in watts (W)

Explanation: A higher EER value indicates better energy efficiency, meaning the system provides more cooling per unit of electricity consumed.

3. Importance of EER Calculation

Details: EER is crucial for evaluating the energy efficiency of cooling equipment, helping consumers choose cost-effective appliances, and supporting energy conservation efforts. It's commonly used for rating window air conditioners and other unitary cooling equipment.

4. Using the Calculator

Tips: Enter cooling capacity in BTU/hr and power input in watts. Both values must be positive numbers. The calculator will compute the EER ratio in BTU/Wh.

5. Frequently Asked Questions (FAQ)

Q1: What is a good EER rating?
A: Generally, EER ratings of 10 or higher are considered good, with higher values indicating better efficiency. Modern high-efficiency units can reach EER values of 12 or more.

Q2: How does EER differ from SEER?
A: EER measures efficiency at a specific outdoor temperature (usually 95°F), while SEER (Seasonal Energy Efficiency Ratio) measures efficiency over an entire cooling season with varying temperatures.

Q3: Why is EER important for consumers?
A: EER helps consumers compare the energy efficiency of different cooling systems, estimate operating costs, and make informed purchasing decisions that can save money on electricity bills.

Q4: What factors affect EER?
A: EER is affected by compressor efficiency, heat exchanger design, fan motor efficiency, refrigerant type, and overall system design and installation quality.

Q5: Is higher EER always better?
A: While higher EER indicates better efficiency, higher-rated systems typically cost more upfront. The optimal choice depends on climate, usage patterns, and budget considerations.