Commercial HVAC · Troy, Michigan · Since 1977
Big buildings.
Heavy systems.
Built right.
We design, fabricate, install and service commercial HVAC for engineers, owners and developers across Metro Detroit.
1977
Founded in Metro Detroit
2B
State boiler certification, unlimited BTU
Design-Build
One contractor, start to finish
In-House
Sheet metal fabrication shop
Mechanical systems for buildings that cannot afford downtime.
Denny's has spent decades on large commercial and industrial projects, from rooftop units and VRF to boiler plants and building controls. We take the whole job: design-build support, our own sheet metal shop, certified installers, and service after the keys change hands.
Engineers get clean coordination. Owners get a team that answers the phone. Developers get a crew that finishes on schedule.
What we do
One contractor from design to commissioning.
Design-Build & Engineering Support
Budget input, equipment submittals and coordinated shop drawings with your MEP engineer.
Commercial HVAC Install & Retrofit
Rooftop units, split systems and VRF for offices, retail, industrial and multi-tenant buildings.
Boilers & Hydronic Piping
2B-certified installation of low-pressure boilers of unlimited BTU capacity, piped end to end.
Building Automation & Controls
Controls integration, scheduling and monitoring so the building runs as designed.
Sheet Metal Fabrication
Custom duct and fittings built in our own shop, on your schedule.
Refrigeration, Ventilation & Service
Commercial refrigeration, restaurant ventilation, and planned maintenance from the team that installs the equipment.
Who we build for
Built around how you work.
Engineers & GCs
Coordination that respects your drawings
Clean submittals, fast RFI turnaround and field crews who build what is on the sheet.
Owners & Facility Managers
Uptime, with someone to call
Planned maintenance and service from the team that installed your equipment.
Real Estate Developers
Schedule and budget you can bank on
Early pricing support, tenant-ready systems and a crew that finishes.
How a job runs
From drawings to commissioning.
01
Scope & Budget
We review drawings and specs, flag value-engineering options, and return a clear number.
02
Submittals
Equipment data and shop drawings, coordinated with the other trades before anything ships.
03
Fabricate
Ductwork and fittings built in our own sheet metal shop, on your schedule.
04
Install
Experienced field crews led by installers who know how a whole job goes together.
05
Start-up & Service
Start-up, commissioning, then maintenance and service for the life of the system.
Field work
Real roofs. Real crews.
Always great service and a trustworthy company that can handle their business. Great guys doing great work.
Chef Miguel, customer
Great work but a bit pricey. The quality is surely worth it. You get what you pay for and Denny's is the perfect example.
Kirtus Thurston, customer
The best in the business and the best in the Metro Detroit area. Affordable.
Hassan Sayed, customer
Let's talk about your project.
Questions, a new build or a service call? Tell us what you need.