Blower Door Tests and Home Inspections in Edmonton: What Each One Tells You Before You Buy (2026)

Are you noticing chilly drafts during Edmonton’s heating season and wondering whether a home inspection will measure how much air a house leaks?

Direct answer: No. A standard home inspection in Edmonton is a visual, non-invasive examination. Your inspector may note visible draft indicators, but does not perform a blower door test. A registered energy advisor conducts that diagnostic measurement as part of an EnerGuide evaluation.

In winter, drafts may feel more noticeable, but that sensation alone does not tell you how much air is escaping or what is causing the discomfort. As a home inspector with more than 10 years of inspection and construction experience, I help buyers understand the difference between observing a concern and measuring building performance.

What is a blower door test, and what does it measure?

What does a blower door result actually tell you about a home?

A blower door test uses a calibrated fan temporarily installed in an exterior doorway. The fan changes the pressure inside the home compared with the outdoors. An energy advisor measures the airflow needed to maintain that pressure difference, which helps quantify how much air passes through leaks in the building envelope.

One common result is ACH50, or air changes per hour at 50 pascals. In plain language, it expresses the home’s measured air leakage under a specific test pressure. It is a controlled diagnostic number, not a count of how often the home’s indoor air naturally changes during everyday life.

A blower door test can help an energy advisor assess overall airtightness and investigate where leakage may be occurring. However, that number does not describe the full physical condition of the property, predict your utility bills, or guarantee a particular level of comfort.

A blower door test is part of the broader process of an EnerGuide home evaluation. A registered energy advisor collects information about the home, including its insulation, windows and doors, heating and cooling equipment, and ventilation, then uses energy-modelling software to produce an evaluation and rating. Read Natural Resources Canada’s overview of EnerGuide home evaluations.

What does a standard home inspection cover instead?

If your inspector is not measuring air leakage, what can you expect them to look for?

A home inspection is a visual, non-invasive examination of accessible areas and components. The InterNACHI Standards of Practice describe this approach and explain that a standard inspection is not technically exhaustive and does not identify every concealed or latent defect.

During a home inspection in Edmonton, an inspector may note visible clues related to drafts and air leakage, such as:

• The visible condition of weatherstripping around accessible exterior doors and windows.
• Gaps or deterioration visible at an accessible attic hatch.
• Visible sealing conditions around accessible service penetrations.
• Draft symptoms you report, such as a cold area near a window or door. This is useful context, not a measured result.
• Temperature differences observed during an inspection when thermal imaging is included as an add-on.

These observations can help you understand what was visible on inspection day and whether further assessment may be appropriate. They do not establish the amount of leakage or identify every concealed source. InspecUs offers thermal imaging as an inspection add-on. A thermal camera can show surface temperature patterns, but it does not replace a blower door test or quantify ACH50.

A standard home inspection does not include pressurization testing, quantified ACH numbers, or energy modelling. Those diagnostics and calculations belong to an energy advisor. To learn what a property inspection can cover, see our certified home inspection service in Edmonton and home inspection services. If you are deciding how far to take your due diligence, our guide to scheduling inspections during your condition period explains how add-ons fit into the buying timeline.

When is it worth booking an EnerGuide evaluation?

When might a separate energy assessment give you information that a home inspection cannot?

Consider asking a registered energy advisor about an EnerGuide evaluation when:

1. You are buying an older home with high heating bills. An evaluation can assess the home’s energy performance and provide a broader context for discussing possible efficiency upgrades. A seller’s past bills alone do not identify the reasons behind energy use.
2. You are buying a newer home with an EnerGuide label. Ask to see the label and report. The evaluation date and the home’s condition or equipment since that assessment can affect how useful it is as a reference.
3. You are planning major renovations. An advisor can model the home and help you consider energy performance alongside your renovation plans.
4. You want to review a builder’s performance claim. Ask for the documentation behind it, including any EnerGuide report or blower door result, and confirm with an advisor what the information does and does not establish.

There is a local detail worth knowing if you are considering a new build. The City of Edmonton’s December 2025 Building Edmonton newsletter says the City’s insulation and vapour-barrier inspection and sign-off process is now a permanent option, and that the blower door test may be completed after drywall installation. If a builder tells you a test forms part of the home’s documentation or local requirements, ask for the applicable report and clarify its purpose and timing. A City sign-off and an EnerGuide evaluation are not the same thing as a buyer’s home inspection.

Natural Resources Canada explains that an EnerGuide evaluation is performed by an energy advisor registered with NRCan. You can ask the advisor what the evaluation includes and how to interpret its result for the specific home. Neither an inspection nor an energy assessment can promise energy savings or a particular future comfort level.

How do a home inspection and an energy evaluation work together?

How can you use both services to make a more informed purchase decision?

1. The home inspection identifies visible indicators. Your inspector reports observed conditions in accessible areas and can document draft or comfort concerns you raise, along with other relevant findings within the inspection scope.
2. The energy advisor measures and models performance. If you book an EnerGuide evaluation, the advisor can quantify airtightness through blower door testing and use the collected home data to model energy performance.
3. You consider both reports together. Use the inspection report to understand observed property condition and the energy report to understand measured airtightness and energy performance. Together, they can help you ask informed follow-up questions, plan a budget, or discuss findings during negotiations.

“In my experience, the inspector’s role is to observe and report the symptoms that are visible on inspection day. The energy advisor’s role is to measure airtightness and interpret the numbers. Those are complementary services, not substitutes.”
Banti K Shaw

What should you ask before you buy?

What questions will help you understand the home’s inspection and energy-testing records?

1. Does the home have an EnerGuide label and a written evaluation report?
2. When was the evaluation completed, and has the home changed since then?
3. What draft or comfort symptoms has the seller noticed, and when are they most apparent?
4. Which inspection add-ons, such as thermal imaging, are available and appropriate for your concerns?
5. If there is a blower door report, who performed the test, when was it completed, and what does the result cover?

These questions can help you distinguish a recorded measurement from an observation or a seller’s description. If an answer raises a concern, ask the relevant professional what additional assessment is appropriate.

Talk with InspecUs about your inspection scope

Would it help to discuss what a standard inspection can assess before you book? Contact InspecUs to ask about inspection scope and available add-ons, including thermal imaging. We can help you understand what the inspection can report and when a registered energy advisor may be the right next step.

Meta description: Buying in Edmonton? Learn what inspections reveal about drafts, what blower door tests measure, and when to hire an energy advisor for an EnerGuide evaluation.