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Home Energy Audit

Answer a room-by-room questionnaire about insulation, windows, appliances, and heating to get your home's energy efficiency score, prioritized improvements, and estimated annual savings.

Energy Audit Questionnaire

Step 1 of 7
Home Profile

Basic information about your home helps calibrate the baseline energy estimate.

Insulation

Insulation is the most cost-effective way to reduce heating and cooling costs.

Windows & Doors

Windows and doors can account for 25-30% of heating and cooling energy loss.

Heating & Cooling

HVAC is typically the single largest energy expense in a home, often 45-50% of total energy use.

Appliances

Major appliances and always-on devices account for roughly 20% of home energy use.

Lighting

LED bulbs use 75% less energy than incandescent and have one of the fastest payback periods of any upgrade.

Water Heating

Water heating is typically the second-largest energy expense, accounting for about 18% of home energy costs.

How It Works

Scoring Methodology

Each of the 7 categories is scored 0-100 based on your answers. The overall score is a weighted average that mirrors the relative energy impact of each category:

  • Heating & Cooling (30%): The largest energy consumer. System type, age, efficiency rating, controls, and duct condition all matter.
  • Insulation (25%): Proper insulation reduces HVAC workload year-round and is often the highest-ROI upgrade.
  • Windows & Doors (15%): Heat loss through glazing is significant, especially in older single-pane homes.
  • Water Heating (15%): The second-largest energy expense in most homes after HVAC.
  • Appliances (10%): Major appliances and phantom loads contribute meaningfully over a full year.
  • Lighting (5%): LEDs have largely solved lighting efficiency; a smaller share but fast and cheap to fix.
Energy Cost Estimates

Annual energy costs are estimated using DOE/EIA data for average US homes, then scaled by home size, age, climate zone, home type, and number of occupants. The baseline is approximately $2,100/year for a 1,800 sq ft home in a mixed climate with average efficiency.

Savings Figures

Improvement savings are drawn from EPA Energy Star, DOE, and ACEEE research on average measured savings per measure:

  • Smart thermostat: $130-$180/year
  • Air sealing and weatherstripping: $150-$250/year
  • Attic insulation upgrade to R-38+: $200-$400/year
  • High-efficiency HVAC replacement: $300-$700/year
  • Complete LED lighting transition: $75-$200/year
  • Heat pump water heater: $200-$350/year
  • Energy Star appliances: $50-$150/year per appliance

Related Utils

Carbon Footprint Calculator Energy Cost Estimator Solar Panel Estimator Heating Cost Calculator Water Usage Calculator

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