EER To COP & COP To EER (Calculator + Table)

Looking to make sense of those baffling HVAC metrics?

Enter the EER to COP calculator. Within seconds, this powerhouse tool deciphers the efficiency jargon, transforming EER values into understandable COP figures.

Whether you're an HVAC newbie or a seasoned pro, this calculator is your ticket to mastering energy efficiency.

Dive in and watch those numbers do the talking.

EER to COP calculator and table

EER to COP and COP to EER Converter

EER to COP and COP to EER Converter


Conversion Table


A Comprehensive Guide to Understanding EER to COP Conversion

When it comes to HVAC systems, understanding key performance indicators such as Energy Efficiency Ratio (EER) and Coefficient of Performance (COP) is vital for optimal system operation and energy usage. This article will offer an in-depth understanding of these measures and guide you on how to convert EER to COP efficiently.

Understanding Energy Efficiency Ratio (EER)

EER is a metric used in the HVAC industry to determine the energy efficiency of cooling devices. It's calculated by dividing the cooling capacity of a device (in BTUs) by its power input (in watts) at a specific temperature.

graph LR; A[BTUs] --> B[EER Calculation]; C[Watts] --> B;

Deciphering Coefficient of Performance (COP)

COP, on the other hand, is a measure used to gauge the efficiency of heating and cooling systems. It's calculated by dividing the energy output of the system (in BTUs or Watts) by the energy input (in Watts).

graph LR; D[BTUs/Watts] --> E[COP Calculation]; F[Watts] --> E;

Key Differences Between EER and COP

It's crucial to comprehend that EER and COP aren't directly comparable, as they serve different purposes and are measured under different conditions. While EER is a measure of a system's cooling efficiency, COP is used to assess both heating and cooling efficiencies.

The EER to COP Conversion Process

While these two metrics aren't interchangeable, it's possible to convert EER to COP using a straightforward formula:

COP (for cooling) = EER * 0.2931

Why 0.2931, you may wonder? This conversion factor is the result of a simple conversion from BTUs to Watts, where 1 BTU/hr = 0.2931 Watts.

graph LR; G[EER] --> H[EER to COP Conversion] --> I[COP];

Converting COP to EER

If you're curious about the reverse conversion, the process is just as straightforward:

EER = COP / 0.2931

In this case, we're converting back from Watts to BTUs.

graph LR; I[COP] --> J[COP to EER Conversion] --> G[EER];

Practical Application of EER to COP Conversion

Converting between these measures can provide a more holistic view of a system's performance and energy efficiency. For instance, COP can offer insights into a system's heating performance, which isn't represented by EER. As such, converting EER to COP can provide a fuller understanding of the system's overall performance.

A Step-by-step Guide to EER to COP Conversion

estimated energy requirement, EER to COP Conversion
  1. Obtain the EER Value: This value can be found on the device's specification sheet or by contacting the manufacturer.
  2. Multiply the EER by 0.2931: Use the conversion formula provided above.
  3. The Result is the COP: The result of this calculation is the system's COP (for cooling), which represents the system's cooling efficiency in terms of Watts, not BTUs.

In Conclusion

Understanding EER and COP is crucial for evaluating the energy efficiency of heating and cooling systems.

Converting between these measures offers a comprehensive perspective on system performance and aids in making informed decisions about HVAC equipment selection and energy usage. By mastering the conversion process outlined in this guide, you can optimize your HVAC system for peak performance and energy efficiency.


Werpy M R, Burnham A and Bertram K 2010 Propane Vehicles: Status, Challenges, and Opportunities (Argonne National Laboratory)

Vahid Vakiloroaya et al.A review of different strategies for HVAC energy saving

Energy Convers. Manag.(2014)

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