SEER to EER Reference Values
Convert seasonal efficiency (SEER) to approximate steady-state EER for quick HVAC comparisons.
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Reference Value Index
This page lists 23 reference values for quick browsing and lookup.
All Reference Values
- 8 SEER = 7.68 EER
- 9 SEER = 8.46 EER
- 10 SEER = 9.2 EER
- 11 SEER = 9.9 EER
- 12 SEER = 10.56 EER
- 13 SEER = 11.18 EER
- 14 SEER = 11.76 EER
- 15 SEER = 12.3 EER
- 16 SEER = 12.8 EER
- 17 SEER = 13.26 EER
- 18 SEER = 13.68 EER
- 19 SEER = 14.06 EER
- 20 SEER = 14.4 EER
- 21 SEER = 14.7 EER
- 22 SEER = 14.96 EER
- 23 SEER = 15.18 EER
- 24 SEER = 15.36 EER
- 25 SEER = 15.5 EER
- 26 SEER = 15.6 EER
- 27 SEER = 15.66 EER
- 28 SEER = 15.68 EER
- 29 SEER = 15.66 EER
- 30 SEER = 15.6 EER
Reference Table
| SEER | Approx EER | Approx COP |
|---|---|---|
| 8 SEER | 7.68 EER | 2.251 |
| 9 SEER | 8.46 EER | 2.479 |
| 10 SEER | 9.2 EER | 2.696 |
| 11 SEER | 9.9 EER | 2.901 |
| 12 SEER | 10.56 EER | 3.095 |
| 13 SEER | 11.18 EER | 3.277 |
| 14 SEER | 11.76 EER | 3.447 |
| 15 SEER | 12.3 EER | 3.605 |
| 16 SEER | 12.8 EER | 3.751 |
| 17 SEER | 13.26 EER | 3.886 |
| 18 SEER | 13.68 EER | 4.009 |
| 19 SEER | 14.06 EER | 4.121 |
| 20 SEER | 14.4 EER | 4.22 |
| 21 SEER | 14.7 EER | 4.308 |
| 22 SEER | 14.96 EER | 4.384 |
| 23 SEER | 15.18 EER | 4.449 |
| 24 SEER | 15.36 EER | 4.502 |
| 25 SEER | 15.5 EER | 4.543 |
| 26 SEER | 15.6 EER | 4.572 |
| 27 SEER | 15.66 EER | 4.589 |
| 28 SEER | 15.68 EER | 4.595 |
| 29 SEER | 15.66 EER | 4.589 |
| 30 SEER | 15.6 EER | 4.572 |
Frequently Asked Questions
Frequently asked questions for SEER to EER and its reference values.
What is the difference between SEER and EER?
SEER is a seasonal efficiency metric over varying conditions, while EER is measured at a specific operating condition.
How is EER approximated from SEER here?
This tool uses a common quadratic approximation to estimate EER from SEER for fast planning comparisons.
Can this replace manufacturer performance data?
No. Use manufacturer submittals for final design; this conversion is a practical estimate.
Why include COP with EER?
COP provides a unitless efficiency comparison and can be useful when comparing international equipment data.
Methodology and Review
Each row on this page links to a value detail page derived from the same conversion data file as the main calculator and reference table. This reduces inconsistencies across page variants.
Editorial metadata and structured data are rendered across the converter page and linked value pages. Review policies are documented in our review process and editorial policy.