Commercial rooftop unit service
Contact HLM when a rooftop unit is not heating or cooling as expected, airflow has changed, or an unusual noise appears. Note which area of the building is affected and when the problem occurs so the team has useful context for an assessment.
Furnaces and heating concerns
Furnaces are included in HLM's service scope. Tell the office if the concern is a lack of heat, an intermittent problem or an error display. The equipment details and your site location help the team confirm the requested work and arrange service.
Filters, belts and pulleys
HLM offers tailored preventative maintenance, including air filters, belts and pulleys. Share your HVAC equipment list, operating hours and previous service information to discuss a plan for the units at your site.
You can include refrigeration and cooking equipment in the same maintenance discussion. HLM will confirm the scope and timing appropriate to each unit.
Plan access before the visit
For rooftop equipment, mention roof access arrangements and any building-management requirements. Have a site contact available and include the unit's model details if accessible. Call 416-806-6877 for service or 905-264-3120 to discuss maintenance with the office.
Questions before you book
Does HLM service commercial rooftop HVAC units?
Yes. Rooftop units are part of HLM's commercial HVAC scope. Share your location, unit details and access requirements when arranging service.
Can HVAC be part of a kitchen equipment maintenance plan?
Yes. HLM offers tailored maintenance across HVAC, refrigeration and commercial food equipment. The team will discuss the scope for the units at your site.
What should I include in an HVAC service request?
Provide the business address, affected unit or area, observed heating, cooling or airflow problem, and a site contact. Include any error display and roof access requirements.

