Commercial HVAC Services in Southwestern Ontario
Sheet metal, rooftop units, and refrigeration — designed, fabricated, and installed by one accountable team.
What We Do
Full-Scope Mechanical Services
From the first site measure to final commissioning, DC Mechanical handles the complete scope of commercial HVAC work in-house — so your project stays with one experienced team from start to finish.
Sheet Metal Fabrication
Every building is different, and stock fittings rarely fit. Our in-house sheet metal shop fabricates custom ductwork, transitions, plenums, and curb adapters to match your building exactly — whether it's a new install, a retrofit in a tight mechanical room, or repairs to an aging system.
Because we measure, fabricate, and install with the same crew, there's no waiting on a third-party shop and no tolerance stack-up between trades. From our shop in Dorchester we serve commercial and industrial buildings across London, Woodstock, St. Thomas, and the rest of Southwestern Ontario.
- Custom ductwork & fittings
- Duct transitions & curb adapters
- Plenums & mechanical room metal
- Retrofit modifications
- Airflow balancing & corrections
- Maintenance & repair
Rooftop Unit Installation
Rooftop units are where our expertise runs deepest. We manage the full replacement cycle — assessing the existing unit, coordinating structural work and crane lifts, fabricating curb adapters, and commissioning the new equipment — with minimal disruption to your business hours.
As a Daikin factory certified installer with certifications from Mitsubishi and LG, we size and install RTUs for commercial buildings across London, Dorchester, and Southwestern Ontario. One team owns the whole job: curb, gas, controls, and start-up.
- New installations & replacements
- Crane & rigging coordination
- Structural & rooftop coordination
- Custom curb adapters
- Gas piping & connections
- Start-up & commissioning
Refrigeration Systems
From walk-in coolers to complete refrigeration systems, we install and service the equipment your business depends on. Our technicians are licensed for gas and refrigeration work, and every system is commissioned and documented before we hand it over.
Restaurants, grocery stores, and food processors across London and Southwestern Ontario rely on refrigeration that simply cannot fail. We design for reliability first, and back every install with preventative maintenance so small issues never become spoiled inventory.
- Commercial refrigeration systems
- Walk-in coolers & freezers
- Gas piping & venting
- System commissioning
- Preventative maintenance plans
- Diagnostics & repair
How We Work
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Site Assessment
We walk the site, measure everything, and review your existing equipment before we quote — so the number you get is the number you pay.
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Design & Fabrication
Ductwork, transitions, and curbs are custom-built in our shop while equipment is on order — so installation day isn't fabrication day.
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Installation
Crane lifts, rigging, gas, and electrical coordination are scheduled around your business hours to keep disruption to a minimum.
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Commissioning & Support
Every system is started up, balanced, and documented. We stand behind the install with maintenance and priority service.
Let's Get Your Project Moving
Call us or send a few details about your building — we'll follow up within one business day.