132 Cartwright Ave, North York ON
Mon–Sat 8am–7pm · Sun 9am–5pm
Commercial HVAC · Rooftop units · Toronto & GTA
Commercial HVAC & rooftop units
across Toronto & the GTA
Rooftop units, make-up air and planned maintenance for GTA property managers, restaurants and light industrial sites. We schedule around your operating hours, not ours.
TSSA-licensed commercial crews
RTU replace & repair
Written quotes before equipment orders
Serving Toronto & the full GTA
At a glance
FocusCommercial HVAC / RTU
Typical size3–20+ ton packages
PriorityTenant uptime
CoverageToronto & GTA
Phone647 953-4252
BaseNorth York
1,000+
Clients served
TSSA
Certified team
7 days
A week support
GTA-wide
Service coverage
20+ yrs
Climate experience
Commercial work
Buildings that cannot simply close for the day
Rooftop units, make-up air and planned maintenance for GTA property managers, restaurants and light industrial sites. We schedule around your operating hours, not ours.
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Full guide Rooftop units
3 to 6 ton RTU service, replacement and changeovers on commercial roofs across the GTA.
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Commercial heating
Boilers and unit heaters for warehouses, shops and light industrial space.
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Commercial cooling
Keeping tenants, kitchens and server rooms within spec through a GTA July.
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Maintenance plans
Scheduled servicing that catches failures before a tenant reports them.
Commercial HVAC Toronto
Rooftop and facility HVAC that keeps tenants comfortable
Commercial work is judged by whether the space below stayed open. That single constraint shapes everything else — when the crane comes, when the roof is opened, how long a unit can be down, and whether the job happens overnight or over a closed weekend.
The buildings we look after are mostly small commercial: shops, offices, clinics, restaurants and light industrial units where one or two rooftop units carry the whole floor. There is no plant room, no redundancy, and no spare machine to fall back on.
That makes planned maintenance worth more here than in a building with backup. Most of the failures we attend were visible at the previous service, and the difference between a scheduled visit and an emergency one is usually a seized damper or a blocked drain nobody looked at.
Commercial downtime is expensive
We diagnose economizer, ignition, compressor, and control faults before recommending a crane day. When replacement is required, we match curb, gas, electrical, and condensate paths so the new package does not create secondary problems for your tenants.
High-efficiency commercial equipment incentives
Qualifying high-efficiency rooftop replacements may unlock utility programs depending on IEER/SEER2 and furnace AFUE. We note likely paths on quotes — see rebates.
When to call for commercial HVAC
- No cool / no heat affecting tenants
- Short cycling, lockouts, or economizer faults
- Unusual noise or vibration on the roof
- Rising energy use with stable occupancy
- Unit age 12–20+ years with major failures
- Planned capital replacement this fiscal year
- New fit-out changing load or hours
- Need documented maintenance for insurance/lease
Rooftop unit or split system?
Rooftop unit vs. commercial split system
Both cool and heat commercial space well — the right call depends on your roof, ceiling height, and zoning needs.
| Rooftop unit (RTU) | Commercial split system | |
|---|---|---|
| Footprint | All equipment on the roof, out of leasable space | Indoor air handlers take usable floor/ceiling space |
| Best for | Single-zone retail, restaurants, warehouses | Multi-tenant or multi-zone buildings |
| Ductwork | Centralized, simpler duct runs | More distributed, zone-specific ducting |
| Service access | Rooftop access required for maintenance | Indoor units easier to service; outdoor condenser on roof/ground |
| Typical sizing | 3–20+ ton packaged units | Sized per zone, aggregated tonnage |
Building types
Commercial HVAC applications we support
Light commercial and multi-tenant spaces across Toronto and the GTA.
Retail & strip plazas
Packaged RTUs sized for glass load, occupancy swings, and after-hours setbacks.
Restaurants
Kitchen heat offsets, make-up air coordination, and reliable rooftop packages.
Offices & clinics
Quiet operation, zone comfort, and documented maintenance for managers.
Warehouses & light industrial
Unit heaters, RTUs, and spot cooling where process loads matter.
Mixed-use buildings
Retail below / residential above — careful roof and venting coordination.
Replace-on-failure programs
Age tracking and budget planning before peak season emergencies.
Commercial project flow
How commercial HVAC projects run
From first fault call to commissioned rooftop package — documented for property managers.
Site & roof survey
Access, curb, power
Load / tonnage
Occupancy & hours
Repair vs replace
Written options
Equipment order
Lead times confirmed
Lift & set
Crane window planned
Start-up
Controls & handover
Planned maintenance
Scheduled servicing, around your operating hours
Contracted maintenance for property managers and multi-site operators, with documented visits and priority response.
Discuss a contractCommercial services
RTU and facility HVAC support
Repair-first when smart; right-sized replacement when capital is the better path.
RTU diagnostics
Compressor, ignition, blower, economizer, and control faults diagnosed with clear next steps for managers.
Request a consultation →Rooftop replacement
Like-for-like or right-sized upgrades with curb adapters, gas, electrical, condensate, and start-up.
Request a consultation →New package installs
New construction and renovations: curb coordination, duct transitions, thermostat or BMS interfaces.
Request a consultation →Preventive maintenance
Seasonal filters, belts, coils, and safeties that reduce mid-summer emergencies.
Request a consultation →Commercial splits
Multi-zone and split systems where rooftop packages are not the right footprint.
Request a consultation →Chiller coordination
When your site mixes RTUs and chillers — see our dedicated chillers page for plant work.
Request a consultation →Why Toronto Air Systems
Why GTA facilities choose Toronto Air Systems
Local crews, licensed workmanship, and recommendations built around how Toronto buildings actually heat and cool — not generic scripts.
TSSA-licensed technicians
Every technician who works on your equipment holds current Ontario gas and/or refrigeration credentials — no uncertified subcontractors.
Built for Toronto winters & summers
We size and install equipment for real GTA climate extremes, not brochure averages from milder markets.
Transparent pricing
Detailed written quotes with equipment specs, labour, and warranty terms. No bait-and-switch or surprise change orders.
Multi-brand expertise
We service and install major HVAC brands, so recommendations fit your home — not a single manufacturer quota.
How it works
Our commercial process
From first call to commissioned equipment, you always know the next step, the timeline, and what is included.
Consultation
Tell us about your home or building, symptoms, and goals — by phone or online form.
On-site assessment
A licensed technician evaluates your existing commercial HVAC system, ductwork, and load requirements.
Written quote
You receive clear options, pricing, timelines, and rebate notes — no vague estimates.
Installation or repair
Our TSSA-licensed team completes the work to code with minimal disruption.
Follow-up support
We walk you through operation, warranty, and ongoing maintenance recommendations.
Brands we work with
Commercial brands we commonly service
Bring nameplate photos — we confirm parts availability and retrofit paths quickly.
Where we work
Commercial HVAC across the GTA
North York based — serving commercial corridors throughout Toronto and neighbouring municipalities.
Toronto
All neighbourhoods & districts
North York
Our home base
Mississauga
West GTA residential & commercial
Brampton
Full HVAC coverage
Vaughan
Including Woodbridge & Concord
Markham
East GTA homes & businesses
Richmond Hill
Residential & mixed-use
Scarborough
East Toronto
Etobicoke
West Toronto
Oakville
Halton Region
Pickering & Ajax
Durham Region
Whitby & Oshawa
East GTA
Client reviews
Commercial client feedback
They quoted repair vs replace on our plaza RTU with crane notes included — no surprises on install day.
North York
After-hours window matched our restaurant hours. Unit sized correctly for kitchen load.
Scarborough
Clear documentation for our landlord file and a maintenance plan that actually gets followed.
Mississauga
FAQ
Commercial HVAC FAQ — Toronto
Do you install and replace rooftop units in Toronto?
Yes. We assess, repair, maintain, and replace packaged rooftop units for GTA commercial buildings. Call 647 953-4252 with model numbers and roof access details.
How do I know if my RTU needs replacement?
Repeated major repairs, obsolete refrigerant, unavailable compressors, or chronic efficiency problems usually tip toward replacement. We document both paths with costs.
Can you work after hours?
Many commercial sites need evenings or weekends. Tell us access windows when you book so we can plan crane and lockout accordingly.
What tonnage do small commercial buildings usually need?
Many retail and office suites land in the 3–6 ton range, but glass, kitchen, and occupancy loads change that. See our RTU guides or book a load review.
Do you service chillers too?
Yes — visit our chillers page or mention both systems when you call.
How fast can you respond to a no-cool emergency?
We triage by severity and parts. Peak summer demand stretches schedules — call early with model numbers so we arrive prepared.
How much does commercial HVAC cost in Toronto?
Cost depends on equipment capacity, brand, duct or piping complexity, electrical/gas upgrades, and whether you repair or replace. We provide written quotes after a site assessment so you can compare options fairly. Call 647 953-4252 for a visit.
Do you serve my area in the GTA?
Yes. We are based in North York at 132 Cartwright Ave and regularly serve Toronto, Mississauga, Vaughan, Markham, Scarborough, Etobicoke, Brampton, and nearby communities.
Are your technicians licensed?
Yes. Gas and refrigeration work is performed by TSSA-licensed technicians. We follow Ontario code practice for venting, refrigerant handling, electrical disconnects, and condensate management.
How long does installation usually take?
Many like-for-like replacements finish in one day; complex duct, line-set, or commercial projects may take longer. Your written quote includes the expected schedule and any crane or access notes.
Need commercial HVAC help in the GTA?
Book an assessment with Toronto Air Systems. Call 647 953-4252.