SEER2 Ratings Explained: Comparing High-Efficiency AC Units

https://seoneo3.blob.core.windows.net/mass-hvac/uncategorized/why-old-new-england-homes-are-tricky-to-cool123508.html

If you have shopped for air conditioning recently, you have run into the label SEER2 — possibly without a clear explanation of what it means or why it matters