RTU Not Heating
Cold air or no heat may indicate an ignition, heating-component, or control problem.
Commercial Rooftop HVAC Unit Services in Toronto & the GTA
Toronto commercial buildings rely on rooftop HVAC units to stay comfortable through summer heat and winter cold. When a rooftop unit (RTU) breaks down or loses efficiency, it can disrupt daily operations and increase operating costs.
Mas Air Home Comfort provides commercial RTU repair, installation, replacement, and preventive maintenance across Toronto and the GTA. We service packaged rooftop heating and cooling systems for offices, retail spaces, restaurants, and warehouses.
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Our Commercial RTU Services
Whether you’re replacing an aging rooftop unit or dealing with an unexpected breakdown, Mas Air provides commercial RTU installation, repair, and maintenance services across Toronto and the GTA.
We install and replace commercial rooftop HVAC units, with attention to equipment sizing, system compatibility, and proper installation and startup.
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Call +1 (647)360-6623
We diagnose and repair rooftop unit problems, including no heat, poor cooling, weak airflow, unusual noises, and unexpected shutdowns.
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Call +1 (855)795-1199
Keep your commercial RTU running reliably with routine inspections and preventive maintenance to identify potential issues and reduce unexpected downtime.
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RTU installation & replacement
Our Commercial RTU Installation & Replacement Process
A commercial rooftop HVAC installation starts with the building, not the equipment. We consider system compatibility, site access, and startup requirements before putting an RTU into service.
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Assess the Existing System
Review the building's heating and cooling needs, current rooftop unit, roof access, and site conditions.
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Plan Equipment & Compatibility
Evaluate RTU capacity, roof curb, ductwork, gas or electrical connections, and control compatibility.
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Coordinate the Installation
Plan delivery and rooftop access, remove the old unit when replacing, and install the selected system.
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Test & Start Up
Check heating, cooling, airflow, controls, and relevant safety functions before handover.
Common Commercial Rooftop Unit (RTU) Problems
Heating, cooling, airflow, and control faults can interrupt business operations. These common RTU symptoms may require professional diagnosis and repair.
Not sure what's wrong?
Request RTU Repair
Heating & cooling
RTU Not Cooling
Cooling loss may involve the refrigerant circuit, compressor, condenser components, or controls.
Airflow & mechanical
Weak or Uneven Airflow
Dirty filters, blower or belt problems, and duct restrictions can reduce airflow.
Unusual Noises or Vibration
Rattling or grinding may point to fan, motor, bearing, or mounting issues.
Operation & controls
Short Cycling or Shutdowns
Repeated starts and stops may involve electrical, safety-limit, or control faults.
Thermostat or Control Faults
Unresponsive controls or inconsistent temperatures may involve sensors or wiring.
Making the right RTU decision
Repair or Replace Your Commercial RTU?
Not every rooftop HVAC problem calls for a new unit. The right choice depends on what failed, the equipment's overall condition, the likely repair cost, and how a shutdown affects your business.
Option 01
When Repair Makes Sense
- A specific component has failed, but the rest of the RTU is in serviceable condition.
- Parts are available and the quoted repair is reasonable for the unit's condition.
- The system has otherwise delivered reliable heating and cooling.
Option 02
When Replacement Is Worth Considering
- Breakdowns recur or a major component failure makes repair less economical.
- Rising repair spending and declining performance suggest limited remaining value.
- Parts availability, building needs, or repeated downtime create longer-term concerns.
Mas Air can assess the unit and explain practical repair and replacement options based on your building's needs. We do not assume replacement is always necessary.
Request an RTU Assessment
Preventive care · Commercial rooftop units
Preventive Commercial RTU Maintenance
Routine rooftop HVAC maintenance helps identify wear, airflow restrictions, and operating issues before they lead to unexpected disruption. The inspection scope should match your equipment and building requirements.
- Filters & Airflow
Review filters, fans, and belts where fitted for restrictions or wear.
- Coils & Drainage
Check coil condition and inspect condensate drainage for blockages.
- Electrical & Controls
Review accessible connections, operating controls, and system response.
- Seasonal Operation
Assess heating and cooling performance and applicable safety functions.
Specific tasks and service intervals depend on the RTU model, condition, and site requirements.
Ask About RTU Maintenance
Commercial Clients We've Worked With
From independent businesses to multi-location brands, Mas Air Home Comfort has worked with commercial clients in retail, hospitality, wellness, and other industries across the GTA.
Where We Work
Commercial HVAC Services Across Toronto & the GTA
- Toronto
- North York
- Mississauga
- Brampton
- Vaughan
- Markham
- Richmond Hill
- Oakville
- Burlington
Why Choose Mas Air for RTU Services
24/7 Emergency RTU Support
A rooftop HVAC breakdown can disrupt business operations. Contact our 24/7 service team for urgent RTU heating or cooling issues across Toronto and the GTA.
Licensed Commercial HVAC Technicians
Our licensed HVAC technicians bring hands-on experience in commercial heating and cooling systems, from diagnosing complex rooftop unit faults to recommending practical repair solutions.
Transparent RTU Service Pricing
We provide clear quotes for commercial RTU repairs, installations, and replacements, explaining the proposed work and costs before proceeding with your approval.
Complete Satisfaction Guarantee
We use suitable replacement parts, follow proper service procedures, and check system operation after completing RTU repairs or installations.
Toronto Local Expertise
Serving Toronto and the GTA, we understand the HVAC needs of restaurants, retail spaces, offices, and warehouses, where reliable climate control supports daily operations.
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To receive assistance, please complete the form, and our dedicated team will assist you every step of the way.
Total Comfort Solutions for Your Commercial Property
From expansive industrial warehouses to high-traffic retail centers, Mas Air Home Comfort‘s TSSA-certified technicians deliver reliable, energy-efficient solutions across the Greater Toronto Area.
Explore Our Specialized Commercial Services:
- Rooftop Units (RTUs): Complete installation, repair, and maintenance for all-in-one packaged heating and cooling systems.
- Make-up Air (MUA) Systems: Precision air balancing and fresh air intake to ensure building safety and comfort.
- Warehouse Gas Tube Heaters: Targeted, radiant heating solutions for large industrial floors and open spaces.
- Commercial Garage Unit Heaters: Powerful, space-saving heating for loading docks, workshops, and garages.
Every facility has unique requirements.
Call us today at 1-647-360-6623 or book online for a comprehensive site assessment and a free quote on any of our commercial HVAC services.