Quick answer
No Ontario law names a yearly furnace tune-up for rentals, but the duties around it come close. The Residential Tenancies Act requires heating kept in good repair, the Ontario Fire Code requires every chimney, flue and flue pipe to be inspected at least every 12 months and CO alarms tested annually, and the gas regulation requires appliances kept in safe operating condition. One documented yearly visit covers all three.
A landlord does not need an annual furnace inspection in Ontario under any clause that uses those words. What the law does contain is a set of duties that are hard to meet any other way. This is a heating contractor's reading of the rules, so confirm anything that affects a dispute with your insurer, your fire department or a paralegal.
What Ontario law actually says about furnaces in a rental
- Residential Tenancies Act, section 20: the landlord must maintain the rental in a good state of repair and comply with health, safety and maintenance standards. A furnace is part of that.
- Ontario Fire Code, article 2.6.1.4: every chimney, flue and flue pipe must be inspected for dangerous conditions at intervals of no more than 12 months, whenever an appliance is added, and after any chimney fire. The furnace vent is a flue pipe.
- Ontario Fire Code, article 6.3.4.8: the landlord must test carbon monoxide alarms annually and after every change of tenancy, and must give the tenant the alarm's maintenance instructions.
- O. Reg. 212/01 (Gaseous Fuels), section 15: the owner or user of a gas appliance must ensure it is maintained in a safe operating condition.
So the yearly obligation in black and white is the venting and the CO alarms, not the burner. But nobody can inspect a flue pipe properly without looking at the appliance attached to it, and a landlord who is asked to show the furnace was in safe operating condition has only one kind of evidence: a service report. The alarm rules are explained in Ontario's carbon monoxide detector law.
Why most landlords book a yearly furnace visit anyway
- Insurers: some rental-dwelling policies ask for proof of heating maintenance at renewal or after a claim. Our article on furnace inspections and home insurance covers what they look for.
- Due diligence: if a CO incident ever happens in the unit, a dated report with combustion readings shows the landlord took reasonable care.
- Warranty: manufacturers make maintenance a condition of parts coverage. See whether annual maintenance is needed to keep a furnace warranty.
- Fewer no-heat calls: tenants seldom change filters, and a plugged filter is behind many winter breakdowns. A tune-up is $120–$250; the winter repair it prevents is typically $400–$900, plus the scramble to restore heat.
What the visit should produce for your file
A landlord's tune-up is only as useful as the paper it leaves. Ask for all of this on one dated report:
- The technician's name and TSSA gas licence number, and the furnace model and serial number.
- Combustion readings: carbon monoxide in the flue gas, oxygen, and the temperature rise across the heat exchanger against the rating plate.
- Gas pressure at the valve, and a note that the vent was checked from the furnace collar to the termination.
- A CO alarm test, with the alarm's expiry date recorded.
- The filter changed, with its size written down so the tenant or the next visit can match it.
- Any deficiency found, and whether it was corrected or quoted.
The steps of the service itself are listed in what a furnace tune-up includes. Keep each report for as long as you own the building.
Entering the unit: 24 hours' written notice
When the furnace is inside the tenant's unit, the visit is an entry under section 27 of the Residential Tenancies Act. The landlord gives written notice at least 24 hours before, stating the reason, the day, and a time between 8 a.m. and 8 p.m. Book the technician first and put a realistic arrival window in the notice.
Timing matters as much as notice. Heat becomes a vital service on September 1, so the sensible slot is late August or September, before the first cold night finds the problem for you.
Rentals where the yearly check matters most
- Older houses split into two or three units, where a mid-efficiency furnace and a water heater share a lined masonry chimney.
- Basement apartments in 1950s–60s bungalows, where the furnace room is a thin wall away from a bedroom.
- Any unit where the tenant cannot reach the furnace, so nobody sees a wet floor, a rusted vent or a filter that has collapsed.
ZK Mechanical's technicians are TSSA-licensed; tell us the visit is for a rental and ask for the readings on the report. To book a furnace tune-up for a rental in Burlington, Hamilton, Oakville, Milton or Mississauga, call (647) 801-1252 or send the addresses and preferred dates; several units can be done on one trip.