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23 Years
experience
Emergency
services
Your Trusted HVAC Partner in Toronto
National Mechanical Air has been delivering reliable HVAC and refrigeration services to the Greater Toronto Area since 2003. Our team of certified technicians combines extensive industry experience with partnerships across the GTA to address diverse mechanical needs, from emergency repairs to new construction installations. We specialize in commercial and residential systems, including rooftop units, cooling towers, heat pumps, and ventilation, while maintaining a commitment to safety, quality, and customer satisfaction.

With 24/7 emergency support and comprehensive maintenance plans, we ensure uninterrupted comfort and efficiency for institutional, industrial, and multi-residential clients. Our affiliations with organizations like BOMA and ACMO reflect our dedication to industry excellence and ongoing professional development.
Services
HVAC Installation Commercial Refrigeration Building Automation Cooling Tower Repair Emergency HVAC Services Sheet Metal Fabrication Planned Maintenance Agreements Heat Pump Systems Ventilation Solutions Refrigerant Leak Repair
Details
  • Year established: 2003
Highlights and features
  • We have over 20 years of experience in HVAC and refrigeration services.
  • Our team offers 24/7 emergency response for critical system failures.
  • We service all brands and equipment types across commercial, residential, and industrial sectors.
  • Our partnerships with engineers and manufacturers ensure tailored solutions for complex needs.
  • We maintain WSIB clearance, liability insurance, and federal licensing for safety compliance.
Associations and certifications
  • Building Owners and Managers Association (BOMA)
  • Association of Condominium Managers of Ontario (ACMO)
  • United Association: Refrigeration Workers of Ontario
Services
HVAC Installation
We design and install complete heating, ventilation, and air conditioning systems for new commercial and residential buildings. Our technicians ensure energy-efficient setups that meet local regulations and client-specific requirements, including rooftop units and hydronic systems.
Commercial Refrigeration
Our experts service walk-in coolers, ice machines, beverage chillers, and industrial refrigeration units. We perform leak detection, compressor repairs, and refrigerant recovery to maintain optimal performance for food service and storage facilities.
Building Automation
We implement smart control systems that integrate HVAC, lighting, and energy management to reduce operational costs. Our solutions optimize efficiency for both new and existing buildings through centralized monitoring and automation.
Cooling Tower Repair
We diagnose and repair industrial cooling towers, addressing issues like condenser failures and water flow inefficiencies. Our maintenance plans prevent downtime and extend equipment lifespan for manufacturing and data center clients.
Emergency HVAC Services
Our team responds to urgent heating and cooling failures 24/7 across Toronto. We prioritize rapid diagnosis and repairs for residential, commercial, and industrial clients to restore comfort and prevent further system damage.
Questions
What areas do you service?
We serve Toronto and the Greater Toronto Area, including Scarborough, Mississauga, Brampton, and Markham for HVAC, refrigeration, and mechanical services.
Do you offer emergency HVAC repairs?
Yes, we provide 24/7 emergency services for urgent heating, cooling, and refrigeration system failures across commercial and residential properties.
What HVAC systems do you install?
We install rooftop units, heat pumps, hydronic systems, and ducted air systems for new construction projects in residential, commercial, and industrial sectors.
Are your technicians certified?
Our team consists of licensed journeymen technicians with WSIB clearance and federal licensing, ensuring compliance with safety and industry standards.
Do you service all equipment brands?
Yes, we repair and maintain all major HVAC and refrigeration brands, including custom and legacy systems in Toronto and the GTA.
What refrigeration services do you offer?
We service walk-in coolers, ice machines, beverage chillers, and industrial refrigeration units, including leak detection, compressor repairs, and refrigerant management.