Home Energy Audit Guide: What an Assessment Checks

Why an energy assessment can be useful

High utility bills can come from weather, rates, household behavior, equipment condition or the building shell. An assessment helps separate these factors and identify the areas where work is most likely to improve comfort or reduce waste.

It is especially useful before replacing HVAC equipment, adding insulation, remodeling an attic or crawlspace, or installing new windows. Air sealing, insulation and duct changes can alter equipment needs and moisture behavior, so sequencing matters.

What a DIY walkthrough can check

• Review at least 12 months of electric and fuel bills.
• Look for visible gaps around doors, windows, attic hatches and penetrations.
• Check accessible insulation for gaps, compression or moisture.
• Inspect filters and accessible duct connections.
• Note rooms with persistent temperature or humidity differences.
• Record equipment age, model information and maintenance history.
• Check for unsafe combustion symptoms and stop if professional evaluation is needed.

A DIY check can find obvious issues, but it cannot safely reproduce every diagnostic test or determine all moisture and combustion risks.

What a professional audit may include

A professional may inspect the building enclosure, insulation, HVAC, ducts, water heating, lighting and appliances. Depending on the scope, tools can include a blower door, infrared camera, pressure diagnostics and combustion-safety testing.

Ask what testing is included, what credentials the auditor holds, whether the auditor also sells installation work and whether the report will provide measured findings rather than a generic checklist.

How to read the report

Separate health and safety work from energy upgrades. Then group recommendations by prerequisite, low-cost improvement and capital project. Good reports state assumptions, expected benefits, rough costs or savings ranges and important interactions.

• Priority 1: combustion, moisture, electrical or ventilation concerns.
• Priority 2: air sealing and insulation measures that improve the building shell.
• Priority 3: equipment replacement sized for the improved home.
• Priority 4: optional comfort, resilience or renewable-energy projects.

Turn recommendations into comparable bids

Provide the same audit findings and scope to each contractor. Ask how air sealing will be verified, how insulation depth or coverage will be documented, how ventilation will be protected and what post-work testing is included.

Do not assume the lowest equipment price is the best project. Missing air sealing, poor ductwork or an oversized system can reduce the value of a high-efficiency appliance.

Check incentives carefully

Federal, state, local and utility incentives can change. Verify eligibility, product requirements, contractor rules and application timing before signing a contract. Some programs require approval or an assessment before work begins.

Use the Home Maintenance Budget Calculator to keep energy upgrades separate from the reserve needed for ordinary repairs and replacements.