Heat Pumps · Greater Toronto Area

Commercial Heat Pump Service in the GTA

Year-round diagnostics and maintenance for commercial heat pumps, with building-specific retrofit planning for GTA conditions.

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Commercial & industrial HVAC support across the Greater Toronto Area.

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Equipment overview

Heating and cooling performance in one system

Commercial heat pumps operate in both heating and cooling modes, so a performance complaint can involve airflow, refrigeration, defrost, drainage, sensors, controls or the interface with supplemental heat. Sensible reviews the active mode and sequence before recommending repair, monitoring or replacement work.

Where this equipment is used

Offices, retail and mixed-use properties
Schools and community facilities
Low- and mid-rise commercial buildings
Facilities evaluating electrification or hybrid systems

Commercial heat pump condensing units mounted on a flat roof

Signs you need heat pump repair

Defrost cycles running too often, too long, or not at all
Capacity falling off as outdoor temperature drops
Coils icing, or condensate not draining away
Supplemental heat running when it should not need to
Changeover between heating and cooling not following the control signal
Electrical or refrigeration-circuit symptoms at the outdoor unit

Signs you need heat pump replacement

Cold-weather capacity that no longer matches the heating load
Repairs recurring on the same circuit rather than resolving
Refrigerant availability and cost changing the economics of a major repair
Electrical, distribution or space constraints that limit repair options
A supplemental-heat strategy that is carrying more load than intended
A building change that leaves the unit mismatched to the load

Signs you need heat pump preventative maintenance

Indoor and outdoor coils with no scheduled inspection
Defrost, drainage and cold-weather operation not reviewed before winter
Controls, sensors, alarms and changeover response never verified
Airflow components left until a comfort complaint arrives
Operating trends not documented, so seasonal drift goes unnoticed
Recommended work never prioritised against building need

Schedule Service

How do heat pumps cope with GTA winters?

Cold-weather capacity is the design question rather than whether they work at all. Performance falls as outdoor temperature drops, so the heating load, the capacity at design temperature and the supplemental-heat strategy have to be considered together. Where those are matched, operation through an Ontario winter is routine.

Why is the supplemental heat running so often?

Usually one of three things: the heat pump is losing capacity, defrost is running more than it should, or the changeover setpoint is calling for supplemental heat earlier than intended. All three show up in operating trends before they show up on the bill.

How often should a heat pump be serviced?

ANSI/ASHRAE/ACCA Standard 180 sets inspection and maintenance tasks at defined frequencies for commercial heat pumps. Because these units work in both seasons, most buildings schedule twice yearly, with a cold-weather review before winter.

Does the refrigerant phase-down affect heat pumps?

It affects the repair-or-replace decision rather than day-to-day operation. Canada's HFC phase-down reduces supply over time; existing equipment keeps running with no deadline. New commercial installations now generally use a refrigerant with a global warming potential of 700 or below, following the 2023 CSA B52 update.

What causes ice on the outdoor coil?

Some frost is normal and defrost clears it. Persistent ice usually points at a defrost sequence that is not initiating or terminating correctly, restricted airflow across the coil, or a refrigeration-circuit fault. It is worth diagnosing early, because running iced puts load on the compressor.