Commercial heating, cooling, and ventilation under one contract
Best HVAC Toronto is a TSSA-certified commercial HVAC contractor in Toronto, handling commercial heating, commercial air conditioning, and ventilation for property managers with multi-site portfolios, restaurants, retail plazas, offices, warehouses, and industrial facilities across the GTA. The work spans packaged rooftop unit installation and replacement, make-up air and commercial kitchen ventilation, commercial boiler rooms, VAV zone equipment, and planned maintenance agreements with priority dispatch. Our crew brings 20+ years of combined Ontario HVAC experience, carries $2M general liability and WSIB coverage on every technician, and typically reaches emergency calls within two hours.
Commercial work differs from residential in three ways that matter to how a job is run. First, downtime has a direct revenue cost, so scheduling around trading hours is part of the scope rather than a favour. Second, the equipment is larger and usually on a roof, which brings crane lifts, curb adaptation, permits, and coordination with roofing and electrical trades into every replacement project. Third, the compliance and documentation requirements are heavier, particularly for gas appliances and commercial kitchens.
We handle gas compliance in-house. Commercial rooftop units, make-up air units, and boiler rooms are gas appliances subject to the same TSSA requirements as residential equipment, and they get red-tagged too. Because Best HVAC Toronto’s G1/G2 certified technicians are on the same crew that maintains your equipment, an inspection finding can be corrected and cleared without waiting on a second contractor. That is often the difference between a half-day outage and a week of disruption.
What is included in a planned maintenance agreement
Scheduled seasonal servicing with a documented reading sheet at every visit, filter and belt replacement, coil cleaning, economizer and damper operation checks, refrigerant and electrical verification, combustion analysis on gas sections, condition reporting with photographs, priority dispatch on breakdowns, and an annual capital planning summary so replacements can be budgeted rather than discovered.
Equipment we install and service across the GTA
Packaged rooftop units
The workhorse of Toronto retail and light commercial, from strip plazas in Scarborough to office podiums in North York. We supply and install Carrier, Trane, Lennox, and York packaged units, including heat pump RTUs for owners moving part of their heating load off gas. We size on actual load rather than replacing tonnage for tonnage, adapt or replace curbs, coordinate the crane lift, and commission the unit with recorded readings. Economizers get particular attention, since seized dampers and failed enthalpy sensors are among the most common and most wasteful faults we find.
Restaurant and commercial kitchen HVAC
Exhaust hoods remove enormous volumes of air, and that air has to be replaced. Undersized or failed make-up air makes doors hard to open, causes appliances to draft poorly, and pulls conditioned air out of the dining room. We size and balance make-up air properly against total exhaust volume.
Office and retail systems
Split systems, packaged units, and VAV zone equipment. Zone-level complaints usually trace to a failed VAV actuator or controller rather than the central plant, which is a much cheaper fix once correctly diagnosed. We also install dedicated ductless cooling for server rooms and IT closets that need to run around the clock, independent of the building’s occupied-hours schedule.
Warehouse and industrial
Industrial HVAC for distribution centres and light manufacturing in Mississauga, Brampton, and the Concord and Woodbridge employment lands of Vaughan: unit heaters, make-up air, destratification, and ventilation for large-volume spaces where heating a full building height is rarely the efficient answer.
Commercial boiler rooms
Cascade and staged condensing boilers, circulators, and controls for mid-rise rental buildings, condominiums, and commercial buildings, with documented annual boiler service, combustion testing, and safety control checks.
How much does commercial HVAC cost in Toronto?
Equipment size and count come first: tonnage, heating capacity, and how many units are involved. Second is access and rigging, since a crane lift on a busy street with occupancy permits costs considerably more than a lift into an open parking lot.
Third is curb and duct adaptation. New units rarely match the footprint of what they replace, so a curb adapter or transition ductwork is usually required. Fourth is controls and electrical, particularly where three-phase service or building automation integration is involved.
Fifth is scheduling. Work phased overnight or across a weekend to protect trading hours costs more in labour but usually far less than the revenue lost to a weekday closure. We put all five into a written scope with the phasing plan included, so you can weigh the trade-off with real numbers in front of you.
Signs your rooftop unit is due for replacement
Commercial rooftop units carry heating, cooling, and ventilation for most Toronto retail, restaurant, warehouse, and light industrial buildings. They are engineered for 15-20 year service lives with proper maintenance and considerably less without it. The maintenance schedule matters: quarterly filter changes, biannual coil cleaning, annual belt and bearing inspection, and biannual refrigerant charge verification. Planned Maintenance Agreements (PMAs) typically bundle these visits and reduce unplanned failure rates by 60-80%.
Signs an RTU is approaching replacement: age above 15 years combined with rising repair frequency (more than two unplanned calls per season); refrigerant leaks that require recharge more than once per season, especially on R-22 units where refrigerant cost has become punitive; visible rust or corrosion on the cabinet, particularly around drain pans and refrigerant line connections; a compressor that hesitates or short-cycles even after capacitor replacement; and rising utility bills at consistent building load, indicating declining efficiency across the compressor and coil. In 2026, replacement cost for a typical 5-10 ton commercial RTU runs $10,000-$25,000 installed depending on capacity, efficiency tier, and roof access complexity. We provide equipment tenders alongside PMA proposals so property managers can budget both maintenance and eventual replacement in the same conversation.
Kitchen exhaust, make-up air, and retail code requirements
Restaurant HVAC is fundamentally more complex than retail because of kitchen exhaust and make-up air requirements. Commercial kitchen ventilation follows ASHRAE 154 and NFPA 96 for hood design, exhaust rates, and make-up air (MUA) sizing. Every cubic foot of air exhausted through the hood must be replaced with equal outdoor air, tempered in winter and dehumidified in summer, or the restaurant develops negative pressure that pulls exterior doors closed, disrupts hood capture, and pushes odours through neighbouring tenant spaces. Sizing an MUA unit for a 500 CFM kitchen hood typically requires a 3-5 ton dedicated unit with electric or gas heating, running $8,000-$20,000 installed.
Retail HVAC is simpler but must meet ASHRAE 62.1 for ventilation rates (typically 15-20 CFM outdoor air per occupant plus a floor area component) and ASHRAE 90.1 for building energy performance (envelope, lighting, and HVAC efficiency baselines used across most Ontario commercial construction). Common triggers for retail HVAC work: tenant fit-outs requiring new zone controls or capacity additions, thermostat migration from mechanical to digital or Wi-Fi controls, and demolition-and-rebuild interior renovations that require rebalancing airflow across the reconfigured space. Retail typically runs on packaged rooftop units or split systems sized for the leased area, with maintenance handled through the property management contract. We provide both single-tenant service and full property portfolio PMAs for retail centres.
Fewer emergency calls with a planned maintenance agreement
A Planned Maintenance Agreement (PMA) is a scheduled service contract that covers all preventive maintenance on the covered HVAC equipment over a 12-month term, with priority dispatch for any unplanned service calls. Standard PMA scope for commercial equipment: quarterly filter changes on all covered units; biannual coil cleaning (spring and fall); annual belt, bearing, and motor inspection with amperage measurements; biannual refrigerant charge verification with subcool and superheat readings; annual combustion analysis and safety checks on all gas-fired equipment; annual condensate drain flush and pan cleaning; and documented inspection reports filed after every visit.
PMA benefits go beyond the maintenance itself. Priority dispatch means covered clients skip the queue on emergency calls, typically getting on-site response within 4 hours (or 2 hours in the case of Enbridge Red Tag calls) versus 24-48 hours for non-contract callers during peak periods. Repair pricing is typically discounted 10-15% for covered clients, and parts pricing runs at cost-plus rather than retail markup. Equipment tracking is documented across visits, so age, repair history, and remaining useful life are always current for capital budget planning. Contract pricing depends on equipment count and complexity: typical smaller commercial PMAs (3-5 rooftop units, 20,000-40,000 square feet) run $2,000-$4,500 annually at 2026 rates. Larger portfolios (10+ units across multiple sites) are quoted on volume with substantial per-unit discounts and often include annual capital planning reports covering replacement timing for aging equipment.
