How Often Should You Do a Furnace Inspection?

By Ingenium Intuito Group

As winter approaches in Canada, your furnace becomes more than a comfort. It becomes essential. With heating accounting for a large portion of household energy use, knowing how often a furnace inspection should be done is key to keeping your home safe, efficient, and warm through the cold months. A regular annual furnace inspection helps extend the life of your system and reduces the risk of breakdowns when you need heat the most.

How Often Should a Furnace Be Inspected?

Most HVAC professionals in Canada recommend having your furnace inspected once a year, ideally in the fall before the heating season begins. This timing allows technicians to identify wear, confirm safe operation, and make adjustments before the furnace starts running daily. Annual inspections also help prevent unexpected no-heat emergencies during winter cold snaps.

Why Furnace Inspections Matter in Canada

Furnaces in Canada work harder and longer than in many other climates, especially in provinces with long, cold winters like Ontario, Alberta, Saskatchewan, and Manitoba. Because of this heavy demand, regular furnace inspections are a critical part of responsible homeownership.

Many winter service calls are caused by skipped maintenance. Some issues can also pose serious health risks. A cracked heat exchanger or blocked exhaust vent can allow carbon monoxide to enter the home. Since natural gas is colourless and odourless, these problems often go unnoticed without a professional inspection or properly functioning carbon monoxide detectors.

When More Frequent Inspections Are a Good Idea

While once per year is enough for most homes, some situations call for closer attention. Older furnaces, systems that run almost constantly through winter, or homes where past inspections revealed ongoing issues may benefit from additional checks. Staying ahead of small problems helps maintain steady performance and prevents costly mid-season failures.

What Happens During a Furnace Inspection?

A professional furnace inspection is a detailed process, not a quick look at the unit. The technician examines the heat exchanger for cracks, checks burners and ignition components, verifies gas pressure, inspects venting and exhaust systems, and tests safety controls. Electrical connections are tightened, moving parts are lubricated, the blower motor is evaluated, and the thermostat is tested. Cleaning is usually included, along with replacing or cleaning the air filter to support proper airflow and efficiency.

Each part of the inspection is designed to improve performance, extend the furnace’s lifespan, and ensure safe operation throughout the heating season.

Cost of a Furnace Inspection in Canada

In Canada, an annual furnace inspection typically costs between $75 and $150, depending on the contractor, furnace type, and location. If the technician finds issues that require repairs or additional service, those costs are usually discussed in advance.

Some homeowners choose maintenance plans that include yearly inspections along with parts and labour coverage. These plans often range from about $10 to $40 per month and can offer predictable costs and added peace of mind.

Hiring a Licensed HVAC Contractor

Because your furnace is one of the most complex systems in your home, it’s important to hire a licensed HVAC professional. In Ontario and several other provinces, gas technicians must hold valid certifications such as TSSA-recognized G2 or G1 licences. Before booking service, homeowners should confirm the company’s licensing and insurance, verify technician credentials, and review feedback from other customers in their area. This protects both safety and warranty coverage.

Simple Ways to Save Energy After an Inspection

After your furnace inspection, a few simple habits can help maintain efficiency. Replacing furnace filters every 30 to 90 days keeps airflow unrestricted and reduces strain on the system. Using a programmable or smart thermostat allows you to lower temperatures when away or asleep, potentially reducing heating costs by around 10 percent. Keeping vents and returns clear ensures even heat distribution, while regularly testing carbon monoxide detectors maintains an important safety safeguard.

Frequently Asked Questions

How often should I have my heating system checked?

Most Canadian homes should have their furnace or boiler inspected once a year, usually in the fall. Older systems or furnaces showing warning signs may benefit from additional checks.

What does a furnace inspection include?

A standard inspection covers combustion components, the heat exchanger, gas and electrical connections, venting, safety controls, thermostat operation, and cleaning to support proper airflow and efficiency.

How often should furnace ducts be cleaned?

Ducts are typically cleaned every three to five years. Homes with pets, renovations, smoking indoors, or allergy concerns may require more frequent service. Filters, however, should be changed every one to three months.

What happens if you skip furnace maintenance?

Skipping maintenance usually leads to reduced efficiency, higher energy bills, increased wear, and a greater risk of safety issues going unnoticed. In serious cases, it can result in carbon monoxide leaks or complete system failure during winter.