Home assessment guide
Home energy assessment in DFW: tests, report, and scope
Know what a DFW home energy assessment should measure, how blower-door, duct, infrared, combustion, and ventilation findings shape an upgrade plan.
Direct answer
Direct answer
A professional home energy assessment should turn comfort and utility complaints into a documented, prioritized plan. DOE says common tools include a calibrated blower door, infrared scan, and sometimes a duct blower, along with inspection of insulation, HVAC, ventilation, and combustion conditions. Before hiring, define the deliverable: house and duct leakage metrics, test conditions, room and envelope observations, insulation and duct maps, safety findings, utility context, modeled assumptions, repair priorities, photos, and recommended verification. An assessment is most valuable when it reduces guesswork before separate duct, insulation, air-sealing, HVAC, or indoor-air purchases.
Key takeaways
- Require quantitative results and a written prioritized report, not only a walkthrough or sales estimate.
- A blower door, duct blower, infrared camera, static-pressure test, and combustion test answer different questions.
- Separate measured findings, modeled estimates, and product recommendations.
Start with an interview and records
Provide at least twelve months of available utility use, occupancy changes, thermostat schedules, equipment model numbers, renovations, roof or water events, comfort complaints by room and season, indoor-air concerns, and prior proposals. Utility bills show total use, not the cause. The interview helps the assessor choose tests and distinguish a building change from weather, rate, behavior, or equipment operation.
Sources: [doe-assessment], [doe-energy-saver]
Use a calibrated blower door
A calibrated blower door measures whole-house air leakage at a controlled pressure. It can also support leak location with smoke and infrared tools. The report should state the metric, test pressure, house-volume or area assumptions, setup, weather conditions, and limitations. The number does not identify duct leakage by itself and should not be treated as a ventilation design without additional analysis.
Sources: [doe-assessment], [doe-air-sealing]
Use a duct blower for duct leakage questions
A duct blower measures leakage through the duct system under test conditions. Ask whether the test reports total leakage, leakage to outside, or another metric, and which portions were included. Pair leakage with visual condition, location, static pressure, return paths, room airflow, and duct insulation when deciding between sealing, redesign, repair, and replacement.
Sources: [doe-assessment], [doe-duct-research]
Use infrared as evidence, not x-ray vision
Infrared imaging shows surface-temperature patterns. Under suitable temperature difference and test conditions, it can help locate missing insulation, thermal bridges, air movement, or moisture patterns. It does not see through walls, identify every material, prove active moisture, or calculate an exact R-value by itself. The report should include visible images, conditions, interpretation, and confirmation method.
Sources: [doe-assessment]
Inspect insulation and attic durability
Record insulation type, depth, coverage, compression, disturbed areas, eaves, kneewalls, attic hatch, ventilation baffles, storage, ducts, bath exhausts, stains, leaks, pests, and safety clearances. Compare the existing condition with a clearly named guidance table or program. If new insulation is recommended, identify air sealing and repairs that must occur first.
Sources: [doe-insulation], [doe-durable-attics]
Measure HVAC and pressure conditions
Depending on scope, useful checks can include filter fit, temperature operation, total external static pressure, equipment airflow evidence, room airflow, room pressure with doors closed, duct leakage, condensate, controls, and equipment condition. An energy assessor should refer licensed HVAC work appropriately and avoid using one temperature reading to condemn equipment.
Sources: [doe-duct-research], [doe-assessment]
Include ventilation, moisture, and combustion safety
Inventory outdoor-air and exhaust systems, pressure effects, combustion appliances, carbon-monoxide alarms, moisture sources, and visible damage. Tightening the envelope or ducts can change pressure and ventilation. The report should identify urgent safety concerns, specialist referrals, and prerequisites before efficiency work. It should not market a filtration or dehumidification product before source conditions are considered.
Sources: [doe-air-sealing], [epa-iaq], [epa-mold]
Demand a prioritized report
The final report should separate urgent safety and durability repairs, low-cost operations and maintenance, measured envelope and duct opportunities, HVAC corrections, indoor-air measures, and optional capital projects. Each recommendation should cite the supporting observation or measurement, scope assumptions, dependencies, likely benefit category, limitations, and verification method. If savings are modeled, include the tool, inputs, rates, weather basis, and uncertainty.
Sources: [doe-assessment], [doe-energy-saver]
Use independent verification for large projects
For substantial work, consider separating assessment or verification from the company selling the upgrade, or at least require raw results and repeatable tests. After installation, retest the metrics used to justify the work, inspect concealed-work photos, confirm ventilation and combustion safety, and compare the completed scope with the report. Utility bills can be tracked later, but normalize weather, rates, occupancy, and thermostat changes before attributing results.
Sources: [doe-assessment], [doe-air-sealing]
Decision checkpoint
| What you know | What to ask next |
|---|---|
| The home's complaints, utility history, equipment, and renovation context | Which calibrated tests, inspections, and professional boundaries fit the questions? |
| The assessment proposal | Which raw measurements, photos, maps, assumptions, priorities, and referrals will the written report include? |
| The recommended upgrades | Which finding supports each item, what must happen first, and which post-work test will verify completion? |
Common questions
Frequently asked questions
What is the difference between an energy audit and an HVAC estimate?
An assessment measures the house and systems, documents findings, and prioritizes options. An HVAC estimate prices a proposed scope. A sales estimate can use testing, but it should not be presented as an independent whole-home assessment without the promised methods and report.
Do I need a blower-door test?
It is the standard quantitative tool for whole-house air leakage and is especially useful before and after substantial air sealing. The complete assessment may also need duct, pressure, insulation, ventilation, moisture, or combustion checks.
Can an infrared camera find missing insulation?
It can reveal temperature patterns consistent with missing or uneven insulation under suitable conditions. Confirm interpretation with visual inspection, building details, or other evidence.
Will an assessment guarantee savings?
No. It can improve decisions and support modeling, but actual bills depend on weather, rates, occupancy, thermostat use, starting conditions, equipment, and installation quality.
What should the final report include?
Ask for raw test results, conditions, photos, maps, safety findings, prioritized recommendations, supporting evidence, dependencies, cost or savings assumptions, limitations, and post-work verification steps.
Continue your decision
Sources
- U.S. Department of Energy, Consumer Guide to Home Energy AssessmentsOfficial guide to calibrated blower-door tests, duct-blower tests, infrared scans, ventilation checks, and assessment reports.
- U.S. Department of Energy, Energy Saver Guide 2022Whole-home efficiency guidance covering air leakage, insulation, ducts, heating, cooling, and measured upgrade planning.
- U.S. Department of Energy, Consumer Guide to Air Sealing the HomeOfficial guidance on leakage testing, ventilation, combustion safety, materials, and whole-home air sealing.
- U.S. Department of Energy Building America, Improving the Efficiency of Your Duct SystemDOE research guide on duct testing, sealing, insulation, pressure, safety, and repair priorities.
- U.S. Department of Energy, Consumer Guide to Home InsulationOfficial explanation of R-value, insulation locations, inspection, materials, air sealing, and moisture considerations.
- U.S. Department of Energy, Consumer Guide to Durable AtticsOfficial attic moisture, ventilation, air-sealing, insulation, exhaust, and durability guidance.
- ENERGY STAR, Duct SealingOfficial guidance on typical duct losses, comfort symptoms, accessible repairs, and professional duct improvement.
- U.S. Environmental Protection Agency, Improving Indoor Air QualityEPA's source-control, ventilation, and filtration framework for indoor-air decisions.
- U.S. Environmental Protection Agency, A Brief Guide to Mold, Moisture and Your HomeOfficial moisture-control and cleanup boundaries. Mold claims on this site are not medical diagnoses.