Engineered Commercial HVAC Systems. Delivered End-to-End.
We design, install, and maintain commercial HVAC systems across the Greater Toronto Area, delivering engineering precision, disciplined execution, and long-term accountability.
One partner. One system. Total performance.
A NEXT GENERATION MECHANICAL PARTNER
WHO WE ARE
We believe the best-performing commercial mechanical systems are designed by engineers, built with discipline, and supported for their full lifecycle.
GAS Mechanical is a commercial HVAC company serving the Greater Toronto Area, built on deep industry experience and a new generation of leadership. With roots in decades of hands-on mechanical work and engineering expertise, we provide fully integrated HVAC solutions from design and permitting to installation, maintenance, and long-term system performance for commercial and institutional buildings.
WE OPERATE AS TRUE PARTNERS TO OUR CLIENTS, TREATING EVERY BUILDING AS IF IT WERE OUR OWN.
OUR APPROACH IS GROUNDED IN INTEGRITY, TRANSPARENCY, AND RELIABILITY.
ENGINEERED TO FLOW.
BUILT TO PERFORM.
One-Stop Accountability
Integrity & Transparency
Performance Driven
Continuous Improvement
Commercial HVAC SErVICES
WHAT WE DO
Complete mechanical and design-build HVAC solutions. Engineered, built, and maintained under one accountable partner.
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Protect performance. Reduce downtime. Extend equipment life.
Scheduled inspections, cleaning, and tune-ups
Early issue detection to prevent costly failures
Customized maintenance programs per building
Improved energy efficiency and warranty compliance
Maintenance practices aligned with manufacturer requirements to protect warranties and the equipment lifecycle
Year-round comfort for occupants and operations
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When systems fail, we respond.
Fully equipped, trained technicians
Rapid diagnostics and repairs across all major equipment
Reliable, round-the-clock support to minimize disruption
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Precision repairs. Minimal downtime.
Advanced diagnostic tools for accurate issue resolution
Repairs for chillers, rooftop units, air handlers, boilers, and more
High-quality OEM parts for long-term reliability
Clear reporting for facility managers and owners
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Modern systems, installed with engineered control.
Full turnkey solutions from design to commissioning
Expertise across RTUs, chillers, VRF/VRV, air handlers, and boilers
Energy-efficient systems aligned with current codes
Planned installations and upgrades designed to minimize disruption to live operations
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Designed in-house. Built to perform.
System design, permitting coordination, and full code compliance from concept through approval
Load calculations, system layouts, and full HVAC design
Energy modeling and sustainability optimization
Indoor air quality and advanced system integration
Collaborative delivery with architects and contractors
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Smarter buildings. Better performance.
Design and integration of BAS and control systems
Real-time monitoring and remote system access
Energy management and predictive analytics
Seamless upgrades to existing infrastructure
THE PARTNERSHIP TEAM
Andrew brings a hands-on, solutions-focused approach shaped by deep experience in mechanical systems and construction. As a Professional Engineer, he leads design-build projects from concept through completion, ensuring clarity, efficiency, and reliability at every stage. Andrew is known for clear communication, disciplined execution, and building long-term client relationships rooted in trust.
Andrew Perry
Jason brings over 15 years of mechanical experience across field operations, project management, estimating, and system design for commercial clients. With an engineering background and a master’s degree in computer science, he combines practical trade knowledge with advanced technical depth. Jason focuses on system optimization, energy efficiency, building automation, and smart technology integration, delivering innovative, performance-driven solutions.
Jason Ceci
Patrick brings over 15 years of experience in design-build and property management, with a strong understanding of construction and building maintenance. His experience provides invaluable insight into construction and building operations, helping identify methods that save clients time, control costs, and ensure projects are built to perform long after completion.
Patrick Gesualdi
EXPERIENCES & CAPABILITIES
We stand behind performance.
Engineering clarity applied to real-world conditions.
Engineered Experience Across Complex Environments. We work collaboratively with architects, general contractors, owners, and facility teams to ensure systems integrate cleanly, comply fully, and perform as designed.
Our commercial HVAC engineering experience spans both new construction and complex retrofit environments where performance, uptime, and compliance matter.
Proven experience across offices, industrial facilities, retail, multi-residential, hospitals, and data centers
Value engineering to balance upfront cost and long-term ROI
Full-spectrum system expertise from geothermal to VRF
Sustainability, LEED alignment, and ASHRAE/code compliance
Collaborative, turnkey delivery from concept to commissioning
Minimal disruption during implementation, maximum reliability after
OUR LEGACY & FOUNDATION
For over 15 years, our leadership has worked side-by-side with a respected HVAC business serving the GTA and across Canada.
That experience, spanning installations, emergency service, maintenance, and complex commercial systems forms the foundation of how we operate today: Disciplined, Accountable, and Performance-driven.
SERVICE AREA
We proudly serve commercial clients across the Greater Toronto Area (GTA), supporting offices, industrial facilities, retail, multi-residential buildings, healthcare, and data-driven environments.
LET’S TALK ABOUT YOUR SYSTEM
Whether you need commercial HVAC service, maintenance, or a full design-build solution, our team is ready to help.