1. What is COP to EER Conversion?

The COP (Coefficient of Performance) to EER (Energy Efficiency Ratio) conversion is a simple calculation that converts between these two common measures of cooling system efficiency. While COP is dimensionless, EER is expressed in BTU/h per watt.

2. How Does the Calculator Work?

The calculator uses the following formula:

Where:

• \( COP \) — Coefficient of Performance (dimensionless)
• \( 3.412 \) — Conversion factor (BTU/h per watt)

Explanation: The conversion factor 3.412 comes from the relationship between BTU/h and watts (1 W = 3.412 BTU/h).

3. Importance of EER Calculation

Details: EER is commonly used in the United States to rate the efficiency of air conditioners and heat pumps, especially for residential and commercial cooling systems.

4. Using the Calculator

Tips: Simply enter the COP value (must be greater than 0) and the calculator will automatically compute the equivalent EER.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between COP and EER?
A: Both measure efficiency, but COP is a dimensionless ratio while EER has units of BTU/h per watt. EER is typically used for cooling systems at a specific temperature.

Q2: What is a good EER rating?
A: For residential air conditioners, EER values typically range from 8 to 12. Higher values indicate more efficient systems.

Q3: Can I convert EER back to COP?
A: Yes, simply divide the EER by 3.412 to get the COP value.

Q4: Why is 3.412 the conversion factor?
A: It comes from the exact conversion between BTU/h and watts (1 W = 3.412142 BTU/h, often rounded to 3.412).

Q5: Are there limitations to this conversion?
A: This is a straightforward mathematical conversion, but note that EER is typically measured at specific conditions (95°F outdoor temp), while COP can be measured at various conditions.