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Understanding SEER2 Ratings: What They Mean for Your Wallet
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Understanding SEER2 Ratings: What They Mean for Your Wallet

The HVAC industry recently transitioned from SEER to SEER2. Learn what this new efficiency standard means and how it impacts the cost of new equipment.

AV Action Air Tech Team
August 15, 2026
7 min read

What is SEER2?

SEER stands for Seasonal Energy Efficiency Ratio. It's essentially the "miles per gallon" rating for your air conditioner. In 2023, the Department of Energy updated the testing procedures to better reflect real-world conditions (like ductwork static pressure), resulting in the new SEER2 standard.

Why the Change?

The old SEER testing conditions were a bit too perfect and didn't accurately simulate the restrictive ductwork found in most homes. SEER2 tests equipment under higher static pressure, giving homeowners a much more accurate picture of how efficient the unit will actually be once installed.

Minimum Requirements

In the Southwest region (including California), new AC installations must now meet a minimum of 14.3 SEER2 (equivalent to the old 15 SEER). Higher ratings like 18 or 20 SEER2 will cost more upfront but offer massive long-term energy savings.

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