1. What is SEER vs SEER2?

SEER (Seasonal Energy Efficiency Ratio) and SEER2 are ratings that measure air conditioning and heat pump cooling efficiency. SEER2 is an updated standard that uses different testing conditions.

2. How Does the Conversion Work?

The conversion formula is simple:

Explanation: SEER2 ratings are approximately 5% lower than SEER ratings for the same equipment due to more stringent testing conditions.

3. Importance of SEER2 Rating

Details: As of January 2023, SEER2 became the new minimum efficiency standard in the U.S. Understanding the conversion helps when comparing older SEER ratings with new SEER2 requirements.

4. Using the Calculator

Tips: Enter the SEER rating of your equipment to see its equivalent SEER2 value. This helps determine if older equipment meets new standards.

5. Frequently Asked Questions (FAQ)

Q1: Why was SEER2 introduced?
A: SEER2 uses more realistic testing conditions that better reflect real-world performance, including higher external static pressure.

Q2: Is the conversion exact for all units?
A: The 0.95 multiplier is an approximation. Actual conversion may vary slightly by equipment type and model.

Q3: What are the current SEER2 minimums?
A: As of 2023, minimum is 13.4 SEER2 (14 SEER equivalent) in northern states and 14.3 SEER2 (15 SEER equivalent) in southern states.

Q4: Does SEER2 affect heating efficiency ratings?
A: Yes, HSPF (Heating Seasonal Performance Factor) was also updated to HSPF2 with similar testing changes.

Q5: Will my old SEER-rated unit become illegal?
A: No, existing installations can remain, but new installations must meet SEER2 standards.