A certified home energy audit is the most important step you can take before any major upgrade investment. It tells you exactly where your home is losing energy, which upgrades will actually move the needle, and what rebate programs you qualify for — before you spend a dollar on contractors.
A certified EnerGuide home evaluation is a systematic, science-based assessment of your home's energy performance. A registered energy advisor (REA) certified by Natural Resources Canada visits your property, performs a series of diagnostic tests, and generates a formal EnerGuide rating.
The blower door test is the cornerstone of any legitimate audit. The advisor temporarily installs a calibrated fan in your front door, depressurizes the home, and measures how much air is escaping through gaps, cracks, and penetrations. This produces an ACH50 (air changes per hour at 50 pascals) reading that quantifies your home's air leakage precisely.
In most Ontario homes built before 2000, this test reveals leakage levels that account for 25-40% of annual heating costs. It is the single most actionable data point in the entire assessment.
Using an infrared camera during the blower door test, your advisor will identify exactly where heat is escaping — poorly insulated wall cavities, ceiling bypasses around pot lights, rim joists, electrical penetrations. These images go directly into your report and give your insulation contractor a precise scope of work.
Following the visit, you receive a formal EnerGuide rating — a score from 0 to 100 reflecting your home's energy efficiency. More importantly, you receive a detailed report that models the projected energy savings and cost of each recommended upgrade. Every recommendation is ranked by payback period and cross-referenced with applicable rebate programs including the Home Renovation Savings Program, Enbridge Home Efficiency Rebate, and the Canada Greener Homes Loan.
Contractors sell what they install. An energy auditor has one job: find out what your home actually needs. Without baseline testing data, insulation and HVAC recommendations are educated guesses. Many Ontario homeowners have spent $20,000+ on the wrong upgrade first — then discovered the audit afterward showed a different priority entirely.
A certified EnerGuide audit typically costs between $400 and $600 in Ontario, depending on home size and location. For most homeowners this fee is partially or fully offset by rebate programs — the HRS Program includes an audit incentive, and the Canada Greener Homes Loan program requires a pre-retrofit audit as a condition of eligibility.
The more relevant number: the average Ontario homeowner who completes post-audit upgrades recovers the audit cost within 6 months through lower energy bills, often before any rebate cheques arrive.
Audit results vary by home age, construction type, and existing upgrades, but the most common priorities we see across Ontario properties are:
For a full breakdown of how upgrades are sequenced, see our guide on whether to insulate before getting a heat pump.
Yes — most major Ontario and federal rebate programs, including the Home Renovation Savings Program and the Canada Greener Homes Loan, require a pre-retrofit EnerGuide audit by a registered energy advisor as a condition of eligibility. The audit must be completed before work begins.
The EnerGuide rating is a standardized measure of a home's energy consumption developed by Natural Resources Canada. Ratings run from 0 (very leaky, high consumption) to 100 (net-zero ready). Most Ontario homes built before 1990 score in the 40–65 range. Post-upgrade re-evaluations document efficiency improvements for rebate claims.
A blower door test uses a calibrated fan installed in your front door to pressurize or depressurize your home and measure air leakage. It quantifies exactly how drafty your home is and — combined with an infrared camera — pinpoints exactly where the leaks are occurring.
A home inspection checks the condition of visible building components. An energy audit measures performance — specifically thermal performance and air leakage. A home inspector can tell you the furnace is old; an energy auditor tells you whether replacing it or insulating the attic first will save you more money.
Fully free audits are rare. Some utility programs have offered subsidized audits, but the current landscape mostly involves rebates that offset the audit cost rather than eliminating it. The HRS Program includes audit incentives that reduce your net cost significantly. We'll walk you through exactly what applies to your home in a free initial consultation.
A thorough EnerGuide audit for a standard detached home takes 2 to 3 hours on-site. Larger homes or those with complex mechanical systems may take longer. You receive your written report and EnerGuide label within a few weeks of the visit.
Book a free consultation to learn what a certified home energy audit involves, what it costs, and which rebates offset that cost for your specific home.
Book Free Consultation