Ontario HVAC Incentives 2026: What's Available for GTA Commercial and Multi-Residential Buildings

Ontario HVAC incentive programs can cover 15–75% of qualifying commercial and multi-residential HVAC upgrade costs in 2026 — but most GTA property managers either don't know what's available, confuse residential programs with commercial ones, or miss application deadlines that disqualify their project after the equipment is already purchased. This post covers every active incentive program available to GTA commercial and multi-residential buildings right now — with specific dollar amounts, eligibility requirements, deadlines, and the one rule that disqualifies more projects than any other.

One important clarification before anything else: the Ontario heat pump rebates of $7,500–$12,000 you've seen advertised are from the Home Renovation Savings Program — a residential-only program for low-rise homes. Commercial buildings, multi-residential towers, and condos are not eligible. The Canada Greener Homes Grant closed to new applications in February 2024 and the Greener Homes Loan stopped accepting applications in October 2025. Neither is available. The programs below are what is actually available to commercial and multi-residential buildings in the GTA in 2026.

Kontrol Buildings helps GTA property managers identify, apply for, and capture incentive funding on every qualifying HVAC project. For the complete commercial HVAC overview see our Complete Commercial HVAC Guide for GTA Property Managers.

What This Post Covers

1. The One Rule That Disqualifies More Projects
2. IESO Save on Energy Retrofit Program — Up to 50%
3. IESO Peak Performance Program — New 2026
4. Enbridge Gas Commercial Custom Retrofit — Up to 75%
5. Enbridge Affordable Housing Program — Up to 85%
6. IESO Existing Building Commissioning — Up to $150,000
7. IESO Energy Performance Program
8. CMHC Green Housing Programs
9. IESO CoolSaver Program — Instant Rebates
10. City of Toronto and Municipal Programs
11. IESO Strategic Energy Management — Free Training
12. Programs NOT Available to Commercial Buildings
13. How to Maximize Incentive Capture

The One Rule That Disqualifies More Projects Than Any Other

Apply before you buy. Almost every commercial HVAC incentive program in Ontario requires pre-approval before equipment is purchased. Starting work, issuing a purchase order, or installing equipment before the application is approved disqualifies the project — regardless of how eligible the equipment is. This is the single most common reason GTA property managers miss incentive funding. Confirm program eligibility and submit the application before any commitment to equipment. No exceptions.

IESO Save on Energy Retrofit Program — Up to 50% of Project Costs

The IESO Retrofit Program is the primary electricity-saving incentive for commercial and multi-residential buildings in Ontario. It covers up to 50% of eligible project costs for equipment upgrades that reduce electricity consumption — including HVAC controls, chillers, motors, variable frequency drives (VFDs), building automation systems, and high-efficiency cooling equipment.

Regional Bonus — Double the Incentive in Constrained Areas

Buildings located in electricity-constrained areas of Ontario can receive double the standard incentive rate for most non-lighting HVAC projects — still capped at 50% of eligible project costs. This means qualifying projects in constrained areas reach the 50% cap faster with fewer efficiency measures. Check with the IESO or your HVAC contractor to determine whether your building is in an eligible constrained area — this is a significant funding multiplier that most property managers and competitors are not aware of.

Two Streams

• Prescriptive stream — for common equipment upgrades with pre-set incentive amounts. Standard HVAC equipment like high-efficiency RTUs, VFDs, and LED lighting replacements qualify under fixed incentive schedules.
• Custom stream — for complex or engineered projects where incentives are calculated based on actual measured energy savings. Larger HVAC retrofits, BAS integration projects, and multi-system upgrades typically qualify under the custom stream.

Key Details for GTA Property Managers

• Eligible: commercial, institutional, and multi-residential buildings
• Covers: HVAC equipment, controls, BAS, VFDs, motors, lighting, data centre equipment
• Up to 50% of eligible project costs
• Pre-approval required before equipment purchase
• Important: IESO Retrofit Program rules changed on June 30, 2026 — confirm current terms and incentive rates at saveonenergy.ca before submitting any new application
• Contact: retrofit@ieso.ca or 1-844-303-5542 (Mon–Fri, 8:30 AM – 5:00 PM)

For property managers planning an HVAC retrofit in 2026, this is typically the single largest incentive source. See also our energy management services page for how we help buildings optimize energy performance before and after retrofit projects. The key is submitting the application before any equipment purchase — and confirming current program terms since rules changed on June 30, 2026.

IESO Peak Performance Program — Get Paid to Reduce Peak Load (New 2026)

This is the IESO's newest program, launching for the 2026 summer season. It pays commercial and institutional buildings to reduce HVAC electrical load during peak summer demand days — essentially turning your building's HVAC flexibility into a seasonal revenue stream.

How It Works

When the Ontario electricity grid reaches peak summer demand, participating buildings receive a signal to reduce HVAC load for a defined period. Buildings with capable building automation systems can automate this response — pre-cooling before peak periods, adjusting setpoints, and managing load without affecting tenant comfort.

What It Pays

• Performance incentive: approximately $54,845 per MW-season — paid based on your actual curtailment performance across the season's peak events
• Enabling incentive: a one-time $20/kW ($20,000/MW) to offset upfront costs like BAS controller upgrades, sub-meters, or automation software needed to participate

Eligibility

• Building or aggregated portfolio must demonstrate at least 500 kW of demand-response capacity
• Participants must be Class B electricity customers
• A capable building automation system is effectively required for automated response

For GTA property managers with larger commercial buildings or multi-building portfolios and an existing BAS — this program essentially pays you for flexibility you may already have. The enabling incentive also creates a funded path to upgrade BAS capabilities if your current system cannot support automated demand response.

Enbridge Gas Commercial Custom Retrofit Program — Up to 75% of Upgrade Costs

For GTA buildings heated by natural gas — which includes the majority of commercial and multi-residential buildings — the Enbridge Gas Commercial Custom Retrofit Program offers the most generous incentive rate of any Ontario program: up to 75% of energy-efficiency upgrade costs.

What It Covers

• High-efficiency boiler replacements
• Make-up air unit replacements and upgrades
• Air curtains
• Energy and heat recovery ventilators (ERVs/HRVs)
• HVAC controls upgrades — with an enhanced limited-time incentive for controls projects

Key Details

• Incentive rate: up to $1.20/m³ of natural gas saved for controls projects, up to $0.40/m³ for standard retrofits
• Maximum: up to 75% of the energy-efficiency upgrade cost, capped at $100,000 per project for commercial buildings and $500,000 for institutional buildings
• Controls limited-time offer: the enhanced $1.20/m³ controls incentive required purchase order by June 30, 2026 — contact Enbridge to confirm whether this enhanced rate has been extended or reverted to the standard rate
• Commissioning deadline: all projects must be commissioned and submitted by October 31, 2026
• An Enbridge Gas Energy Solutions Advisor must assess project eligibility before work begins
• Available to commercial buildings in the Enbridge Gas service area across the GTA — including Toronto, Mississauga, and Vaughan

For property managers planning a boiler replacement, MAU upgrade, or controls modernization — this program should be the first call. The standard commercial incentive remains active through 2026 — confirm with your Enbridge Energy Solutions Advisor whether the enhanced controls rate is still available or has reverted to $0.40/m³. All projects must be commissioned and submitted by October 31, 2026.

Enbridge Gas Affordable Housing Multi-Residential Program — Up to 85% of Costs

For multi-residential buildings that qualify as affordable housing, social housing, non-profit, or co-op — Enbridge offers an enhanced program with the highest incentive rates available in Ontario.

• Up to 85% of upgrade costs — and under limited-time offers for eligible providers, up to 100%
• Maximum $200,000 per project
• Covers the same equipment categories as the standard commercial program
• Scoped with an Enbridge Energy Solutions Advisor

GTA property managers managing affordable housing portfolios should investigate this program specifically — the incentive levels are significantly higher than the standard commercial program and can make projects that would otherwise be deferred financially viable.

IESO Existing Building Commissioning Program — Up to $150,000

This program funds the optimization of existing building operations and maintenance — improving energy performance without replacing equipment. It is particularly valuable for buildings where the HVAC equipment is still functional but not operating at peak efficiency due to scheduling issues, sensor drift, control logic problems, or deferred maintenance.

• Up to $150,000 for qualifying buildings
• Requires minimum electricity consumption of 750,000 kWh per year
• Covers BAS optimization, retro-commissioning, and operational improvements
• Particularly valuable for older commercial and multi-residential buildings with aging but functional BAS platforms

For property managers with buildings where the BAS is underperforming or where energy costs have crept up despite functional equipment — this program funds the diagnostic and optimization work that identifies why the system is wasting energy and fixes it. See also our HVAC preventive maintenance and HVAC service and repair pages for how ongoing maintenance supports energy performance.

IESO Energy Performance Program — Pay for Performance

For buildings that achieve measurable reductions in electricity use, the Energy Performance Program provides incentives based on verified savings.

• $0.15/kWh for summer peak demand reductions
• $0.04/kWh for off-peak energy savings
• Requires at least 5% reduction in electricity use
• Verified through metering — actual savings, not estimates

This program works best for larger buildings undertaking comprehensive energy retrofits where the combined impact of multiple upgrades — HVAC, lighting, controls — delivers a measurable 5%+ reduction.

CMHC Green Housing Programs — For Multi-Residential and Condo Buildings

Canada Mortgage and Housing Corporation offers specific programs for multi-residential rental housing and condo energy efficiency upgrades. CMHC programs are separate from the Enbridge and IESO programs and can often be stacked with provincial incentives for maximum funding coverage.

• Low-interest financing and grants for multi-residential energy efficiency retrofits
• Applicable to rental buildings, condo corporations, and social housing
• Covers HVAC equipment upgrades, building envelope improvements, and energy system modernization
• Federal program — available across Ontario regardless of local utility territory

For condo boards and multi-residential property managers see our Definitive Condo HVAC Guide and our Multi-Residential HVAC Guide for how incentive funding fits into reserve fund and capital planning.

IESO CoolSaver Program — Instant Rebates on Cooling Equipment

The CoolSaver program provides point-of-sale rebates on qualifying commercial cooling equipment — including rooftop units, split systems, and air-cooled chillers. Unlike the Retrofit Program which requires a project application, CoolSaver rebates are applied at the time of purchase through participating distributors.

• Available on qualifying high-efficiency cooling equipment from participating distributors
• Rebate applied at point of purchase — no separate application required
• Can be combined with other IESO programs on different equipment within the same project
• Check saveonenergy.ca for the current qualifying equipment list and participating distributors in the GTA

For GTA property managers replacing rooftop cooling units, CoolSaver is the simplest incentive to capture — the rebate is handled by the distributor at the time of purchase with no pre-approval paperwork.

City of Toronto and Municipal Programs

In addition to the provincial IESO and Enbridge programs, the City of Toronto and select GTA municipalities offer supplementary incentive programs for commercial building energy efficiency upgrades. These municipal programs can often be stacked with provincial incentives for maximum coverage.

• City of Toronto — Better Buildings Partnership and Net Zero Existing Buildings Strategy programs supporting commercial building decarbonization in Toronto
• Regional municipalities — Peel Region (covering Brampton and Mississauga), York Region (covering Vaughan and Markham), and others periodically offer supplementary energy efficiency incentives
• Municipal program availability and funding levels change more frequently than provincial programs — confirm current availability before committing to a project timeline

IESO Strategic Energy Management Program — Free Training

For property managers and facilities teams who want to build internal capacity for ongoing energy management, the IESO offers the Strategic Energy Management (SEM) program — a free, cohort-based training program that teaches building operators to identify and implement energy savings opportunities on an ongoing basis.

• Free to participate — no cost to the building or the property manager
• Cohort-based format with peer learning from other building operators
• Focuses on operational improvements and behavioural changes that reduce energy consumption without capital investment
• Particularly valuable for property managers overseeing portfolios where small operational improvements across multiple buildings compound into meaningful savings

Programs That Are NOT Available to Commercial Buildings

This section exists because these programs are frequently confused with commercial incentives — and the confusion costs property managers time and credibility when presenting capital project budgets to building owners and boards.

• Home Renovation Savings Program (HRSP) — offers up to $7,500 for air-source heat pumps and $12,000 for ground-source. This is a residential-only program for low-rise homes. Condos, commercial buildings, and multi-residential towers are not eligible.
• Canada Greener Homes Grant — closed to new applications in February 2024. No longer available.
• Canada Greener Homes Loan — stopped accepting new applications October 1, 2025. Funding fully committed. No longer available.
• Oil to Heat Pump Affordability Program (OHPA) — federal program for residential homeowners replacing oil heating. Not applicable to commercial or multi-residential buildings.

If a contractor quotes you an incentive from any of these programs for a commercial or multi-residential building — they are either misinformed or misrepresenting the program. The programs listed in the sections above are the ones that actually apply to your building type.

How to Maximize Incentive Capture on Your Next HVAC Project

1. Start with the Application, Not the Equipment

The most common mistake is choosing the equipment first and then trying to fit it into an incentive program. The most effective approach is the reverse — identify which programs your building qualifies for, then specify equipment that meets program requirements and maximizes the incentive value.

2. Stack Programs Where Eligible

Many Ontario incentive programs can be combined as long as the total incentive does not exceed 100% of the project cost. An HVAC retrofit that reduces both electricity and natural gas consumption can potentially qualify for IESO Retrofit Program funding on the electrical savings and Enbridge Gas funding on the gas savings — applied to the same project. Federal CMHC programs can often be stacked with provincial programs. Your HVAC contractor should identify all applicable programs as part of the project scope.

3. Time the Project Around Deadlines

The key deadlines remaining in 2026 are:

• June 30, 2026 (passed) — IESO Retrofit Program rule changes took effect and Enbridge Gas controls limited-time offer closed. Confirm current terms before submitting new applications.
• October 31, 2026 — Enbridge Gas commissioning deadline. All projects must be operational and submitted by this date.
• Ongoing — IESO Retrofit, CoolSaver, Commissioning, and Energy Performance programs accept applications on a rolling basis. Incentive budgets are finite each cycle — apply early.

Property managers planning major HVAC capital projects in 2026 should work backward from these deadlines to ensure applications are submitted, equipment is specified, and work is completed within the funding windows.

4. Document Everything from Day One

Incentive applications are approved or rejected based on documentation — energy assessments, existing equipment specifications, proposed equipment specifications, invoices, commissioning records, and performance verification. Missing or incomplete documentation is the second most common reason projects are disqualified after the pre-approval requirement. Keep a complete project file from the first conversation with your Energy Solutions Advisor through final commissioning.

5. Work with an HVAC Company That Handles Incentive Applications

Not every HVAC contractor manages incentive applications. An experienced commercial HVAC company familiar with Ontario incentive programs handles program identification, application preparation, equipment specification to program requirements, and documentation submission as part of the project scope — not as an afterthought or add-on. This is the difference between capturing funding and discovering after installation that the paperwork doesn't meet program standards.

For complete details on what drives the cost of commercial HVAC retrofits see: What Drives Commercial HVAC Replacement Costs in Toronto. For how to evaluate when equipment should be replaced vs repaired see: 10 Signs Your HVAC System Needs Replacement — Not Just Repair. For the R-410A refrigerant transition that is driving many 2026 replacement decisions see: R-410A Phase-Out — What Every GTA Property Manager Needs to Know.

Program details last verified: July 2026. All incentive amounts, eligibility rules, and deadlines are set by the respective program administrators (IESO, Enbridge Gas, CMHC, City of Toronto) and are subject to change. Kontrol Buildings confirms current program availability at project scoping — contact us to verify what applies to your specific building before committing to any equipment.

Why GTA Property Managers Choose Kontrol Buildings

The incentive programs above are available to every qualifying GTA commercial and multi-residential building regardless of which HVAC company you work with. What makes Kontrol Buildings different is that we handle incentive identification, application, and documentation as part of every qualifying project — with lower overhead, greater transparency, and credentials that satisfy institutional requirements without national chain pricing.

• Lower rates than national competitors — no national chain overhead flowing through to your invoices
• Low truck charges — disclosed upfront, significantly lower than many GTA competitors
• No fuel surcharges — ever — no add-ons, no surprises, quotes match invoices
• Transparent pricing — every cost itemized and disclosed before any work begins. Boards can approve with confidence.
• High-quality workmanship — Local 787 United Association journeyman certified technicians, the highest credential standard in Ontario mechanical trades
• Avetta 2025 Safety Star certified — third-party verified, the prequalification standard required by major GTA REITs and institutional landlords
• BBB+ accredited — independently verified transparent operations and resolved complaints
• HRAI member — Heating, Refrigeration and Air Conditioning Institute of Canada
• ORAC member — Ontario Refrigeration and Air Conditioning Contractors Association
• 400+ buildings served across the Greater Toronto Area
• Quarterly reporting — documented system performance, maintenance records, and capital planning data delivered every quarter
• Full scope under one agreement — HVAC, commercial plumbing, building automation, energy management, and backflow testing
• Trusted by many of the top property managers in the Greater Toronto Area

Helping GTA Property Managers Operate Better Buildings

At Kontrol Buildings we measure our success by one thing — whether our clients are operating better buildings after working with us than before. Better means fewer emergency calls, lower operating costs, documented maintenance history, and a mechanical partner who shows up with the right answers before problems become crises.

Helping our customers operate better buildings — one building at a time, across the Greater Toronto Area.

Frequently Asked Questions

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What HVAC incentives are available for commercial buildings in Ontario in 2026?

The primary programs are the IESO Save on Energy Retrofit Program (up to 50% of eligible costs), the Enbridge Gas Commercial Custom Retrofit Program (up to 75% of upgrade costs, max $100,000 per project), the IESO Peak Performance Program (new for 2026 — pays buildings to reduce peak HVAC load), the IESO Existing Building Commissioning Program (up to $150,000), and the IESO Energy Performance Program ($0.15/kWh for peak reductions). CMHC programs are also available for multi-residential buildings. Residential programs like the Home Renovation Savings Program do not apply to commercial or multi-residential buildings.

Is the Canada Greener Homes Grant still available in 2026?

No. The Canada Greener Homes Grant closed to new applications in February 2024. The Canada Greener Homes Loan stopped accepting new applications in October 2025. Neither program is available for new participants in 2026. The programs listed above — IESO Retrofit, Enbridge Gas Commercial Custom, Peak Performance, and CMHC — are the active programs for commercial and multi-residential buildings.

Can I get the $7,500 or $12,000 heat pump rebate for my commercial building?

No. Those rebates are from the Home Renovation Savings Program, which applies to low-rise residential homes only. Commercial buildings, multi-residential towers, and condo corporations are not eligible. The Enbridge Gas Commercial Custom Retrofit Program offers separate incentives for commercial heating equipment upgrades — up to 75% of upgrade costs.

What is the most important rule for qualifying for Ontario HVAC incentives?

Apply before you buy. Almost every commercial HVAC incentive program requires pre-approval before equipment is purchased or work begins. Starting work before the application is approved disqualifies the project regardless of how eligible the equipment is. This is the single most common reason GTA property managers miss incentive funding.

What are the key incentive deadlines for 2026?

IESO Retrofit Program rules changed on June 30, 2026 — confirm current terms before new applications. The Enbridge Gas controls limited-time offer closed June 30, 2026 — confirm with your Energy Solutions Advisor whether the enhanced rate has been extended. All Enbridge Gas projects must be commissioned and submitted by October 31, 2026. IESO Retrofit, CoolSaver, and Commissioning programs accept applications on a rolling basis with finite budgets each cycle.

Can I combine multiple incentive programs on the same project?

Yes — many programs can be stacked as long as the total incentive does not exceed 100% of the project cost. An HVAC retrofit reducing both electricity and natural gas can potentially qualify for IESO funding on electrical savings and Enbridge funding on gas savings. CMHC programs can often be stacked with provincial programs. Your HVAC contractor should identify all applicable programs as part of the project scope.

What is the IESO Peak Performance Program?

A new 2026 program that pays commercial and institutional buildings to reduce HVAC electrical load during peak summer demand days. Performance incentive of approximately $54,845 per MW-season based on curtailment performance, plus a one-time enabling incentive of $20/kW to offset BAS upgrades needed to participate. Requires at least 500 kW of demand-response capacity and a Class B electricity customer designation.

Does my HVAC company handle incentive applications?

Not all do. An experienced commercial HVAC company familiar with Ontario programs handles program identification, application preparation, equipment specification to program requirements, and documentation submission as part of the project scope. Kontrol Buildings identifies and applies for applicable incentive programs on behalf of every client on every qualifying project.

What does the Enbridge Commercial Custom Retrofit Program cover?

High-efficiency boiler replacements, make-up air unit upgrades, air curtains, energy and heat recovery ventilators, and HVAC controls upgrades. Incentive rate up to $1.20/m³ of natural gas saved for controls projects and $0.40/m³ for standard retrofits, up to 75% of upgrade costs, maximum $100,000 per commercial project or $500,000 for institutional buildings.

Are there special incentives for affordable housing and co-op buildings?

Yes. Enbridge's Affordable Housing Multi-Residential Program offers up to 85% of upgrade costs — and under limited-time offers, up to 100% for eligible providers — maximum $200,000 per project. This is the most generous incentive rate available in Ontario for qualifying multi-residential buildings.

What is the IESO CoolSaver program?

CoolSaver provides point-of-sale rebates on qualifying commercial cooling equipment — including rooftop units, split systems, and air-cooled chillers — through participating distributors. Unlike the Retrofit Program, CoolSaver rebates are applied at the time of purchase with no separate pre-approval application required.

Are there municipal incentive programs in addition to provincial programs?

Yes. The City of Toronto offers the Better Buildings Partnership and Net Zero Existing Buildings Strategy programs. Peel Region and York Region periodically offer supplementary energy efficiency incentives. Municipal programs can often be stacked with IESO and Enbridge programs for maximum coverage — confirm availability as municipal funding changes more frequently than provincial programs.

Is there free training available for building energy management?

Yes. The IESO Strategic Energy Management program is a free, cohort-based training program that teaches building operators to identify and implement energy savings through operational improvements — without capital investment. Particularly valuable for property managers overseeing portfolios where small improvements across multiple buildings compound into meaningful savings.

Book a Free HVAC Assessment for Your GTA Commercial or Multi-Residential Property

If you manage a commercial or multi-residential building in the GTA and want to know which incentive programs your building qualifies for before your next HVAC capital project — Kontrol Buildings offers a free, no-obligation site inspection. We identify applicable programs, assess your equipment, and give you a clear picture of what funding is available before any commitment.

• Phone: 1-833-456-6876 — 24/7 emergency service
• Email: service@kontrolbuildings.ca
• Web: kontrolbuildings.ca/contact