What is an EnerGuide home energy audit and do I need one in New Brunswick? | Insulation IQ?

An EnerGuide home energy evaluation is a standardized assessment of your home's energy performance conducted by a certified energy adviser (CEA) licensed by Natural Resources Canada. It's the foundational diagnostic step for understanding how your home uses energy, where it loses heat, and what upgrades will deliver the best return — and in New Brunswick, it's also the gateway to accessing thousands of dollars in federal and provincial rebates.

The evaluation has two components. The advisory visit is an on-site inspection where the certified energy adviser walks through the entire home, measuring insulation depths, examining the mechanical systems (furnace, water heater, ventilation), checking window specifications, and identifying visible air leakage paths. The adviser then sets up a blower door test, which depressurizes the home to a standard 50 Pascals of pressure and measures total air leakage expressed as ACH50 (air changes per hour). This single number tells you more about your home's energy performance than almost any other measurement — a typical older Moncton or Fredericton home tests at 8–14 ACH50, while a well-sealed modern home should achieve 3.5 ACH50 or better.

After the visit, the adviser enters the collected data into HOT2000, Natural Resources Canada's energy modelling software, which simulates your home's annual energy consumption and generates an EnerGuide rating on a scale of 0 to 100. A score of 0 represents maximum energy loss; 100 is a net-zero home. Most pre-1990 New Brunswick homes score in the range of 50–65. The modelling also generates a prioritized list of upgrade recommendations with estimated energy savings and rough costs for each — effectively a roadmap for your retrofit.

Why does this matter for New Brunswick homeowners specifically? Both major funding programs currently available to NB residents require an EnerGuide evaluation:

The Canada Greener Homes Grant (federal) provides up to $5,600 in grants for eligible retrofits including attic insulation, wall insulation, basement insulation, air sealing, windows, doors, heat pumps, and HRV systems. It requires a pre-retrofit EnerGuide evaluation before any work begins and a post-retrofit evaluation after the work is complete to confirm improvements. You cannot apply retroactively for work already done — the pre-evaluation must happen first.

NB Power's Home Energy Efficiency Program offers rebates on insulation upgrades, heat pumps, and HRV systems for NB Power electricity customers. Many of the higher rebate tiers within NB Power's program also reference the EnerGuide framework and energy adviser recommendations.

The evaluation itself costs approximately $400–$500 in New Brunswick for the pre-retrofit assessment, but the federal Greener Homes program reimburses up to $600 for the cost of both evaluations (pre and post), meaning most homeowners effectively get the evaluations free when they complete qualifying upgrades.

What the EnerGuide evaluation will tell you about insulation: The adviser will measure or estimate insulation levels in the attic, walls, and basement/crawl space and flag them against current NB Building Code requirements and the targets for rebate eligibility. In New Brunswick's climate zone 6, current best-practice targets are roughly R-60 in the attic, R-24+ in the above-grade walls, and R-20+ in the basement. Many homes built before 1990 have attic insulation at R-12 to R-20, wall insulation of R-11 or less, and minimal or no basement insulation. The modelling will show you the projected energy savings from bringing each assembly up to target levels.

The blower door result is particularly valuable because it often reveals that air leakage is a bigger heat loss mechanism than the insulation level itself. A home at R-20 in the attic but 12 ACH50 may benefit more from $2,000 of targeted air sealing than from $5,000 of additional attic insulation — the modelling makes this comparison quantifiable before you spend any money.

For renters and low-income homeowners, Natural Resources Canada's Canada Greener Affordable Homes and various provincial programs provide parallel pathways with sometimes higher grant amounts and fewer eligibility restrictions. A certified energy adviser can identify which programs apply to your specific situation.

In short: if you own a home in New Brunswick that was built before 2010 and has not had a comprehensive energy retrofit, an EnerGuide evaluation is almost certainly worth doing before making any significant insulation investment. It ensures your money goes to the upgrades that will actually make a difference in your specific home, rather than following generic advice that may not match your building's actual weaknesses.

Professionals listed through the New Brunswick Construction Network include insulation contractors who work regularly alongside certified energy advisers and can help you navigate both the evaluation process and the rebate applications efficiently.

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Looking for experienced contractors? The New Brunswick Construction Network connects homeowners with qualified professionals:

• 3Tone Construction Ltd
• Arctic Fox Construction Inc.
• Gionetterenovations
• Brunswick insulation & roofing
• moose luxury painting