HVAC for Rental Properties Ontario 2026: Landlord Obligations, Tenant Rights, and Smart Upgrade Picks

Landlord RTA Obligations for Heat

The starting point for any Ontario rental property is section 20 of the Residential Tenancies Act, 2006. It requires the landlord to provide and maintain the residential complex in a good state of repair and fit for habitation and to comply with health, safety, housing, and maintenance standards. The obligation applies even if the tenant was aware of the condition at the start of the tenancy.[1]

The RTA also defines heat as a vital service in section 2. Section 21 prohibits a landlord from withholding the reasonable supply of a vital service that the landlord is obligated to supply, or from deliberately interfering with its supply. A landlord who does so can face an order under section 29 of the Act and, in serious cases, the offence provisions in section 234.[1]

The practical effect is that an Ontario landlord is responsible for the condition of the furnace, boiler, or other primary heating source; for the ductwork, piping, or hydronic loop that delivers heat; and for any thermostat or control equipment needed to operate the system. Shifting these responsibilities to the tenant through a lease clause is generally unenforceable to the extent it conflicts with the Act.[1]

Minimum Temperature and Vital-Service Rules

The RTA itself does not prescribe a specific minimum temperature. Those numbers come from municipal property standards bylaws enacted under the Building Code Act. The City of Toronto's Chapter 629 is the most commonly cited example. It requires a minimum indoor air temperature of 20 degrees Celsius during the heating season, which runs from September 1 to June 15.[3]

Most other Ontario municipalities have adopted similar standards, though the exact dates and temperatures vary slightly. Landlords and tenants should check the property standards bylaw in the municipality where the unit is located. The combination of the municipal bylaw and section 20 of the RTA is what drives the practical minimum: the bylaw sets the number, the RTA makes it the landlord's job to hit it.[1][3]

The Ontario Fire Code, O. Reg. 213/07, sets separate requirements that intersect with HVAC in rental buildings, particularly around venting, combustion safety, and carbon monoxide alarms. A rental property owner who installs or services fuel-burning heating equipment should ensure the installer is TSSA-licensed for gas work and that CO alarms are in place and functional in accordance with section 9.[4]

AC is Not Required Under the RTA (But Commonly Provided)

Air conditioning occupies a different legal space. The RTA does not list cooling among the vital services. Unless the lease explicitly includes air conditioning as a service of the tenancy, or a municipal bylaw establishes a maximum indoor temperature standard, the landlord has no freestanding obligation to provide it.[1]

That said, two things flow from providing AC once it is installed. First, section 20 requires the landlord to keep the equipment in a good state of repair if it is part of the residential complex. Second, if the lease includes air conditioning as a service, the landlord cannot unilaterally remove or disable the service during the tenancy without the tenant's consent, and doing so can support a tenant application for an order restoring the service or abating rent under section 29.[1]

A growing number of Ontario municipalities are studying maximum indoor temperature bylaws, particularly in large multi-residential buildings, in response to heat-related health concerns. Landlords should track their local bylaw activity rather than assume the current rules will remain static. For the legal framework more broadly, our HVAC Consumer Protection Ontario guide walks through related statutes.

What Tenants Can Do If HVAC Breaks

When the furnace fails, the first step is written notice to the landlord describing the problem and requesting repair. A text or email is sufficient for the record. The landlord is entitled to a reasonable opportunity to respond, though "reasonable" shrinks quickly when outdoor temperatures are below freezing and children or elderly occupants are in the unit.[7]

If the landlord does not respond or the repair is delayed, tenants have three parallel paths:

• Contact the municipal property standards office. An inspector can attend the property, confirm the violation, and issue a work order compelling repair.[8]
• Apply to the Landlord and Tenant Board under section 29 of the RTA. The Board can order the landlord to restore the vital service, abate rent for the period of interruption, award general damages, and in some cases require reimbursement of out-of-pocket costs such as temporary accommodation or replacement heaters.[2]
• In an emergency, contact the municipality or a utility for a welfare check. A loss of heat during cold weather is frequently treated as an emergency by municipal 311 lines.[8]

Tenants should not unilaterally reduce or stop paying rent without an LTB order, as this can expose the tenant to an application by the landlord for arrears. Rent abatement is the Board's remedy to issue, not the tenant's to take.[2]

Landlord Upgrade Decisions: Durability vs Fanciness

HVAC in a rental property should be selected around a different optimization function than in an owner-occupied home. The question is not which system maximizes efficiency or comfort for a resident who will live in the unit for twenty years. The question is which system minimizes downtime, service cost, and aggravation across a ten to fifteen year asset life in which tenants will turn over several times.

That points to a few consistent choices:

• Mid-efficiency single-stage or two-stage furnaces from long-standing model lines outperform high-end variable-speed modulating equipment in rentals. Parts are commodity, every HVAC technician can service them, and the control boards are inexpensive to replace.
• Standard 13 to 16 SEER central air units are preferable to top-of-line inverter condensers in rentals. The refrigerants are widely stocked, the compressors are serviceable, and a failed unit can be swapped in a day rather than waiting for a manufacturer-specific part.
• Commodity thermostats (non-smart or basic programmable) hold up better in rental turnover than proprietary smart thermostats that depend on the tenant's Wi-Fi, account, or phone. A $50 Honeywell thermostat that any tenant understands beats a $300 smart stat that generates support calls.
• Standard filter sizes and a year-round accessible filter slot matter. Tenants are more likely to replace a filter that is obvious and widely available at any hardware store.

Rental HVAC is not the place to chase rebates that depend on proprietary equipment or ongoing data connections. The net savings rarely justify the service complexity, and the equipment tends to outlive the rebate program.

Typical Rental-Property HVAC Replacement Cost

Recent research on HVAC replacement costs in Ontario places a single-family residential furnace and central AC replacement between $6,000 and $20,000, depending on system type, home size, and contractor.[6]Rental-appropriate mid-tier equipment tends to sit in the lower half of that range, roughly $6,000 to $12,000 all-in for a standard three-bedroom home with existing ductwork.

Annual maintenance is a smaller but important line item. HVAC maintenance in Ontario generally runs $150 to $500 per year, with routine tune-ups at $75 to $150 per visit and twice-annual service plans in the $150 to $350 range.[6]Ontario technicians typically bill at $90 to $145 per hour, with diagnostic fees of $90 to $195 for a single-unit service call.[6]

Landlords planning a replacement should also get a clear picture of total rental-life cost rather than just sticker price. Our HVAC Replacement Cost Ontario guide breaks down equipment tiers, installation line items, and what to expect from quotes.

Insurance Implications

HVAC equipment shows up in landlord insurance policies in three places: the building coverage (the structure, including permanently installed equipment), equipment breakdown coverage (a separate endorsement), and rental income coverage (for loss of rent from a covered event). Understanding where a given failure mode falls is the difference between a claim paying and a claim being denied.

Standard landlord policies cover sudden and accidental damage from named perils such as fire, windstorm, and water escape. If a furnace is damaged by a covered peril, the building coverage responds. Mechanical breakdown of the furnace itself, such as a failed heat exchanger after normal wear, is usually excluded unless the policy includes equipment breakdown coverage. This endorsement is inexpensive and worth considering on any rental with significant HVAC investment.

Rental income coverage is the other frequently overlooked piece. When a covered loss makes the unit uninhabitable, this endorsement pays the lost rent for a defined period. In Ontario's climate, a December furnace fire that displaces a tenant for six weeks can produce a rent-income claim larger than the equipment-repair claim itself. Our Home Insurance and HVAC Ontario guide covers the endorsement structure in more detail.

A second insurance consideration is installer qualifications. Ontario requires TSSA licensing for gas-fired HVAC work and ESA permits for electrical work on fixed heating appliances. An unlicensed installation can give an insurer grounds to deny a loss that traces to the work. Every rental HVAC install should be done by a licensed contractor with permits pulled, and the landlord should keep the permit and inspection documentation with the property file.[5]

Frequently Asked Questions