What is Home Energy Performance Score?
A home energy score evaluates overall energy performance across heating/cooling, hot water, lighting, appliance efficiency, and behavioral factors.
The Formula
Score = (Σ Category Scores ÷ Number of Categories) × 100
Worked Example
A household: HVAC 6/10, hot water 7/10, lighting 9/10, appliances 7/10, behavior 5/10.
- Total = 6 + 7 + 9 + 7 + 5 = 34
- Maximum = 50
- Score = (34 ÷ 50) × 100 = 68%
📌 Energy score is 68%, LED lighting is excellent but HVAC efficiency and usage behaviors offer the biggest saving opportunities.
Why This Matters
Bill reduction
Behavioral changes alone can cut energy bills by 10-15% with zero investment. Awareness drives action.
Upgrade prioritization
Scoring reveals which investments will save the most, HVAC upgrades typically offer the best ROI, followed by insulation and air sealing.
Environmental impact
US homes account for 20% of national carbon emissions. Improving your score directly reduces your environmental footprint.
Common Mistakes
❌ Focusing on electricity over heating/cooling
HVAC is typically 50-60% of energy bills. Improving heating and cooling efficiency saves 2-3x more than lighting improvements.
❌ Ignoring thermostat settings
Reducing heating by 2°F saves about 3% on heating bills. Many homes are set 3-5°F higher than needed for comfort.
❌ Upgrading appliances unnecessarily
A 10-year-old fridge costs $50-80/year to run. Replacing it with an EnergyStar model saves only $15-25, not worth the upfront cost until it fails.
Industry Benchmarks
| Category | Good | Average | Poor |
|---|---|---|---|
| Annual Energy Cost (3-bed) | Below $1,500 | $1,500-2,800 | Above $3,500 |
| HVAC Efficiency | Heat pump HSPF2 10+ / SEER2 16+ | AFUE 90%+ furnace | AFUE below 80% |
| Behavioral Score | 8+/10 | 5-7/10 | Below 4/10 |
Source: DOE Home Energy Score & EIA RECS 2026
Benchmark data sourced from DOE Home Energy Score & EIA RECS 2026.