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Eastern Ontario's
Leader in Industrial
& Commercial
HVAC/R Services

Trusted Expertise.
Proven Performance.
Complete Mechanical Solutions.
Service • Installation
Maintenance • Engineering
24/7 Emergency Support

Our Expertise

For more than 50 years, Hamilton Smith Ltd. has delivered reliable HVAC, refrigeration, and energy management services that keep essential facilities operating at peak performance. Our licensed technicians support every aspect of your mechanical systems – design, installation, service, and maintenance – 24 hours a day, 7 days a week.

We now offer expanded mechanical capabilities to support seamless project delivery. TMs includes engineering and design-build services, in-house sheet metal fabrication and installation, and commercial plumbing services such as backflow testing, piping repairs, drainage maintenance, and equipment water supply connections. These integrated services allow us to manage projects and maintenance programs more efficiently, ensuring consistent quality and reliability across all building systems.

Trusted Expertise • Proven Performance • Complete Mechanical Solutions

Request Service
24/7 Emergency Support

HVAC/R Installation
& Repair

Service, Installation, and
emergency support for
HVAC/R systems.

We Install, upgrade, and service commercial and industrial HVAC/R systems, including rooftop units, make-up air systems, chillers, walk-in coolers, freezers, and refrigeration rack systems. Our technicians ensure reliable performance and temperature stability in mission-critical environments.

Preventative
Maintenance

Scheduled programs
to prevent downtime and
extend equipment life.

Customized maintenance programs reduce downtime, extend equipment life, and improve energy efficiency. We service refrigeration racks, ventilation systems, boilers, controls, and mechanical plant equipment with scheduled inspections, cleaning, calibration, and performance checks.

Building Automation &
Energy Management

EMCS systems that
optimize performance and
reduce operating costs.

We design, integrate, and support automation systems (EMCS) that monitor, control, and optimize building performance. Our solutions lower operating costs, maintain environmental stability, and provide real-time visibility into mechanical system operation.

Engineering &
Design-Build

Complete system
design, planning, and
commissioning.

Our engineering team provides full mechanical system planning, design, coordination, and commissioning. We deliver turnkey solutions for refrigeration, HVAC, boiler rooms, chilled water plants, make-up air, ventilation, and specialty cooling applications.

Sheet Metal Fabrication
& Installation

Custom-built
ductwork and ventilation
systems.

Our in-house sheet metal shop fabricates custom ductwork, ventilation components, and air distribution systems to precise specifications. We provide complete delivery and installation to ensure correct airflow and system performance.

Commercial & Industrial
Plumbing Services

Piping, drainage, backflow
testing, and facility
plumbing service.

We provide professional plumbing solutions for commercial and industrial facilities,  including domestic and process water piping, drainage systems, fixture and equipment hookups, backflow prevention testing, emergency repairs, and multi-site service programs.