Rooftop Unit Replacement, Repair and Service for Small and Mid-Size Buildings

Often yes, if the footprint, duct openings and weight are compatible. If not, a curb adapter can bridge the difference. We confirm dimensions during the site walk and may ask your roofer or building engineer to weigh in on the roof.

We coordinate crane or lift arrangements as part of the project scope. Street access, overhead lines and roof access are reviewed during the site walk. Details depend on the site and are confirmed in the written scope.

It depends on the failed part, the unit's condition, its refrigerant type and your plans for the building. A cracked heat exchanger or failed compressor often points toward replacement, while a belt or motor usually does not. We explain both options in writing.

In most cases, yes. Send nameplate photos and a description of the problem through Build My Quote. We confirm what we can do after reviewing the unit and the roof access.

No. We focus on light commercial rooftop units serving small and mid-size buildings. If your equipment is outside that range, we will say so instead of taking on the job. See the full Commercial / Mechanical overview for scope limits.

There is no fixed number. Service life depends on how often the unit runs, how well filters and coils are kept, the roof environment and how the unit was sized. Ontario winters and humid summers both work the equipment hard. Units that get regular seasonal visits tend to hold fewer surprises. A written equipment list with ages helps you plan ahead.

It depends on the work and the municipality. A like-for-like replacement may be treated differently from a larger unit, a new curb, new gas piping or new electrical service. Roof loading can matter too. Rules differ by municipality and change, so we confirm what applies in the written scope before work starts. Your landlord may need to approve roof work as well.

Common causes are a dirty filter or coil, a failed capacitor or contactor, a tripped safety, low airflow or a refrigerant leak. Check the thermostat mode, the breaker and the filter first. Do not keep resetting a unit that trips repeatedly. Send a nameplate photo and any display code through Build My Quote, or call +1 905-407-7353 so we can plan the visit.

On a gas heat section, the usual suspects are the inducer, pressure switch, flame sensor, igniter or gas valve. Snow or ice at the intake or flue can also stop a unit. Check the thermostat and the breaker only. If you smell gas, leave the building and call 911 or the gas utility first. Otherwise call +1 905-407-7353 with the display code.

It depends on the building. A dusty shop or restaurant loads filters faster than a quiet office. Many buildings check filters monthly and change them every few months, then adjust from what they find. Record the filter size so staff can reorder. A restricted filter lowers airflow, strains the blower and can lead to coil problems.

Sometimes. A heat pump rooftop unit suits some buildings, but heating output drops as outdoor temperature falls, so backup heat and electrical capacity have to be reviewed. The building's heat loss, power supply and gas availability all matter. We look at these during the roof walk. See packaged units for how heat pump formats compare.

Snow drift can block intakes and flues, and ice can build up on condensate lines and coils. Clear only what you can reach safely from the ground or a protected access point. Do not climb onto a snowy or icy roof. If the unit has stopped, note the display code and call +1 905-407-7353.

Short cycling can come from an oversized unit, a dirty filter, a thermostat in the wrong spot, a tripping safety or low refrigerant. Frequent starts wear contactors and compressors. A site review checks airflow, thermostat location and safety trips before parts are replaced. Send a request through Build My Quote to book that visit.