Home Energy Audit Score

How It Works

A home energy audit identifies where your home is losing energy and prioritizes improvements by cost-effectiveness. Professional audits use blower door tests and infrared cameras, but this self-assessment covers the five biggest factors. Attic insulation and air sealing typically offer the highest return on investment. Old windows (single pane or failed seals) are expensive to replace but make a dramatic difference in comfort and noise. HVAC equipment efficiency has improved dramatically — a 20-year-old furnace might be 80 percent efficient while a new one reaches 97 percent. Ductwork in unconditioned spaces (attics, crawl spaces) can leak 20 to 30 percent of conditioned air if not properly sealed and insulated.