Start with a simple screening
Gather a year of utility statements and note where the home feels uncomfortable: cold rooms, hot attic spaces, drafts, moisture, or an HVAC system that seems to run constantly. Visually inspect accessible weatherstripping and insulation without disturbing wiring, combustion equipment or suspected asbestos-containing material.
What a professional may measure
A professional assessment can investigate air leakage, insulation, heating and cooling performance, ducts and hot-water systems. Some assessments use a blower door or thermal imaging. Ask for a written report showing which problems were measured, the recommended fixes and how estimates were calculated.
Questions to ask an auditor
- Which tests are included and what instruments are used?
- Can you show baseline measurements and how you identified priorities?
- Will the report separate safety repairs from optional efficiency upgrades?
- Are you independent from the contractors quoting the work?
- What relevant qualifications or certifications do you hold?
Turn findings into a decision
For each upgrade, capture installed cost, expected annual kWh or fuel savings, assumptions and confidence level. Rank urgent safety or moisture work separately from ordinary payback choices. Use our solution comparison to understand tradeoffs and our air-sealing guide to examine a common upgrade category.
Do not modify service panels, generator connections, gas flues, or live wiring as part of a DIY audit. Use appropriately qualified professionals for hazardous or code-controlled work.
What a useful audit report should deliver
Expect more than a list of generic upgrades. The report should identify each observed issue, where it was found, the test or measurement behind it, a proposed correction, and whether the work has safety, comfort or energy implications. A blower-door reading can help quantify leakage; thermal imagery alone can be misinterpreted without appropriate conditions.
| Finding | Useful follow-up | Do not assume |
|---|---|---|
| Attic air leakage | Locate accessible penetrations and obtain a scope for sealing | That attic insulation alone seals leaks |
| Uneven room temperatures | Check duct delivery, envelope and controls | That the thermostat itself is defective |
| High hot-water use | Review usage, leaks and water-heater operation | That a new water heater pays for itself quickly |
Before booking a professional
Ask whether the auditor is paid by a contractor that will quote repairs, whether diagnostic testing is included, whether combustion and ventilation safety will be assessed, and what report you receive. A lower quote may exclude useful diagnostics; a more expensive audit may still be poor value if it offers no actionable measurements.
When a project addresses air sealing or ventilation, avoid work that could reduce indoor air quality or create combustion backdrafting. Safety-critical findings take priority over simple-payback calculations.
References and further reading
These sources explain the technology or rules discussed. They do not imply endorsement of any commercial product.