如何计算Home Energy Audit
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The Home Energy Audit Savings Calculator estimates how much you can save annually by identifying and fixing common energy inefficiencies in your home, including air sealing, insulation, HVAC upgrades, and appliance replacements.
公式
Total Savings = Sum of (Current Usage - Efficient Usage) x Energy Rate for each improvement category
- Ec
- Current Annual Energy Cost ($/year) — Total annual electricity and gas bills
- Sp
- Savings Percentage (%) — Expected reduction from each improvement category
- Ci
- Implementation Cost ($) — Cost to implement the energy efficiency improvement
- PB
- Payback Period (years) — Time to recoup implementation cost through energy savings
分步指南
- 1Enter your current annual electricity and gas bills
- 2Select improvement areas: insulation, air sealing, windows, HVAC, lighting, appliances
- 3The calculator applies typical savings percentages for each improvement
- 4View itemized savings, implementation costs, and prioritized payback ranking
例题解析
输入
$2,400/yr electricity, $1,200/yr gas; improvements: air sealing + attic insulation + LED lighting
结果
Air sealing saves $360/yr, insulation saves $240/yr, LEDs save $180/yr. Total: $780/yr savings (22% reduction)
输入
$3,600/yr total energy; full audit improvements including HVAC upgrade
结果
Total savings: $1,260/yr (35% reduction). Investment: $8,500. Payback: 6.7 years.
常见错误注意事项
- ✕Skipping air sealing before adding insulation — air leaks can account for 25-40% of heating/cooling loss
- ✕Replacing windows for energy savings alone — windows have 15-30 year payback vs 2-5 years for insulation and air sealing
- ✕Not considering that the IRA provides up to $1,200/year in energy efficiency tax credits for qualifying improvements
常见问题
How much can a home energy audit save?
A professional energy audit typically identifies 15-30% in annual energy savings. The average US household spends $2,000-3,000/year on energy, so savings of $400-900/year are common.
How much does a professional energy audit cost?
Professional audits with blower door testing cost $200-600. Many utilities offer free or subsidized audits. The IRA also provides a $150 tax credit for home energy audits.
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