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SEER to EER

Convert seasonal efficiency (SEER) to approximate steady-state EER for quick HVAC comparisons.

Author

Dr. Mateo Silva Herrera

HVAC editorial contributor

Colombian urban planner with a PhD from UCL, designing resilient infrastructure for flood-prone cities

Reviewed by

Prof. Rajesh Sharma

HVAC content reviewer

Indian agricultural economist from IARI New Delhi, advising governments on food security under climate change

Last updatedFebruary 22, 2026

PublishedFebruary 22, 2026

On this page

  1. Reference values
  2. Calculator
  3. Reference table
  4. FAQs
  5. Methodology and review
  6. Related conversions

19 SEER =

14.06 EER

Representative value from the SEER to EER reference table.

Reference Values

Browse 23 reference values with individual detail pages for quick lookup.

Browse all reference values

SEER to EER Calculator

Estimate EER from a SEER rating for quick HVAC system comparisons.

Estimated EER

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Reference Table

Use this complete table for quick lookup and internal linking to specific value pages.

SEER to EER Reference
SEERApprox EERApprox COP
8 SEER7.68 EER2.251
9 SEER8.46 EER2.479
10 SEER9.2 EER2.696
11 SEER9.9 EER2.901
12 SEER10.56 EER3.095
13 SEER11.18 EER3.277
14 SEER11.76 EER3.447
15 SEER12.3 EER3.605
16 SEER12.8 EER3.751
17 SEER13.26 EER3.886
18 SEER13.68 EER4.009
19 SEER14.06 EER4.121
20 SEER14.4 EER4.22
21 SEER14.7 EER4.308
22 SEER14.96 EER4.384
23 SEER15.18 EER4.449
24 SEER15.36 EER4.502
25 SEER15.5 EER4.543
26 SEER15.6 EER4.572
27 SEER15.66 EER4.589
28 SEER15.68 EER4.595
29 SEER15.66 EER4.589
30 SEER15.6 EER4.572

Frequently Asked Questions

Common questions about SEER to EER, formulas, and typical use cases.

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

This page combines a live calculator, precomputed reference values, and FAQ content from the same conversion definition to reduce mismatch between calculator output and lookup tables.

Editorial metadata (author, reviewer, and update date) is rendered on the page and in structured data. See our editorial policy, review process, and corrections policy.

For compliance-sensitive work, verify final values against project requirements, governing standards, and manufacturer documentation.