SEER (Seasonal Energy Efficiency Ratio) measures your AC's cooling efficiency. Higher SEER = lower operating costs.
What SEER Means
SEER represents cooling output divided by energy input over a typical cooling season. A 16 SEER unit is 60% more efficient than a 10 SEER unit.
Current Standards
- **Minimum requirement:** 14-15 SEER (varies by region)
- **Standard efficiency:** 14-16 SEER
- **High efficiency:** 17-20 SEER
- **Premium efficiency:** 21+ SEER
Cost vs. Efficiency
| SEER Rating | Annual Cooling Cost* | Equipment Cost |
|---|---|---|
| 14 SEER | $600 | $ |
| 16 SEER | $525 | $$ |
| 18 SEER | $467 | $$$ |
| 20 SEER | $420 | $$$$ |
*Estimated for average Bay Area home
Bay Area Considerations
Our mild cooling climate means: - Payback periods are longer than hot climates - Mid-range SEER (16-18) often best value - Higher SEER still saves money over equipment life - Consider heat pump SEER for year-round efficiency
What Rating Should You Choose?
14-15 SEER - Budget-conscious buyers - Minimal AC usage - Rental properties
16-18 SEER - Best value for most Bay Area homes - Good balance of cost and efficiency - Qualifies for most rebates
19+ SEER - Maximum efficiency desired - High cooling usage - Environmental priorities - Plan to stay in home long-term
Beyond SEER
Also consider: - EER: Efficiency at peak temperature - HSPF: Heat pump heating efficiency - Variable speed: Better comfort and efficiency - ENERGY STAR: Meets high efficiency standards
Higher SEER alone doesn't guarantee savings—proper sizing and installation matter just as much.