Commercial Rooftop Unit Installation, Repair & Service in Chicago
Don't let cost delay a repair or install that can't wait. Ask us about financing.
Authorized Lennox dealer (also Carrier & Green authorized)
Family-Owned Since 2009
EPA Certified Technicians
4.8★ Google Rating · 90+ Reviews
What Our Commercial Rooftop Unit Services Cover
Whether you're replacing an aging unit, dealing with an unexpected breakdown, or scheduling preventive maintenance to stay ahead of problems, we handle the full scope of commercial RTU work.
- RTU installation: New construction and replacement installs, including equipment selection, load calculations, curb adaptation, electrical connections, and startup commissioning
- RTU repair: Diagnosis and repair of compressor failures, refrigerant issues, heat exchanger problems, control malfunctions, fan motor failures, and more
- Preventive service: Seasonal tune-ups, filter changes, coil cleaning, belt and bearing inspections, and controls verification to keep units running efficiently year-round
- Commercial controls integration: Thermostat and building automation system hookups to give you better visibility and control over your HVAC operations
- Multi-unit buildings: We work on single-RTU properties and multi-unit installations alike, coordinating service across the roof without disrupting the floors below
Every job is handled by EPA certified technicians who work on commercial equipment regularly — not technicians who treat it as an occasional side project.
Packaged rooftop units — RTUs — are the backbone of commercial HVAC in Chicago. They house the heating, cooling, and air distribution components in a single self-contained unit mounted on the roof, freeing up interior space and keeping mechanical systems out of the way of daily operations. Retail stores, office buildings, restaurants, warehouses, and light industrial facilities all rely on them because they're efficient to install, straightforward to service, and built to handle the demands of commercial use.
When a rooftop unit fails, the impact isn't just discomfort — it's lost productivity, unhappy customers, and in some cases a building that can't legally operate. That's the kind of problem that needs a contractor with real commercial RTU experience, not a residential shop that occasionally works on commercial equipment.
We specialize in commercial rooftop unit installation, repair, and service across Chicago and the surrounding suburbs. As an authorized Lennox dealer, we work with commercial-grade equipment built to perform in the conditions Chicago actually delivers.
The HVAC Workhorse Behind Most Commercial Buildings
Scheduled Around Your Business, Not Ours
A rooftop unit repair that takes your building offline during peak hours costs you more than the repair itself. We get that, and we plan accordingly.
Online booking lets you choose a time that works for your schedule. Maintenance agreement members get priority scheduling, which matters most when a unit goes down at the worst possible time. Our technicians work efficiently on-site to minimize the window between arrival and restored operation — because the goal isn't just to fix the unit, it's to get your building back to normal as fast as possible.
If you're managing multiple properties or need service coordinated across a building that can't go dark, call us directly and we'll work out a plan that fits your operational requirements.
What Our Customers Say
See why our neighbors keep calling us back. Book Online and find out for yourself.
Common Questions About Commercial Rooftop Units
How do I know if my rooftop unit needs repair or full replacement?
Age, repair history, and efficiency are the main factors. A unit under 10 years old with a single component failure is usually worth repairing. Units 15 years or older with recurring problems, rising energy costs, or a major component failure like a compressor are often better candidates for replacement. We'll give you an honest assessment either way — we're not going to push a replacement when a repair makes more sense.Age, repair history, and efficiency are the main factors. A unit under 10 years old with a single component failure is usually worth repairing. Units 15 years or older with recurring problems, rising energy costs, or a major component failure like a compressor are often better candidates for replacement. We'll give you an honest assessment either way — we're not going to push a replacement when a repair makes more sense.How long does a commercial rooftop unit installation take?
Most single-unit replacements are completed in one day. Larger installations, multi-unit projects, or jobs requiring custom curb work or significant electrical upgrades may take longer. We'll give you a realistic timeline before work begins so you can plan around it.Most single-unit replacements are completed in one day. Larger installations, multi-unit projects, or jobs requiring custom curb work or significant electrical upgrades may take longer. We'll give you a realistic timeline before work begins so you can plan around it.What does commercial RTU repair cost in Chicago?
Repair costs vary depending on what failed and the size of the unit. Minor repairs — capacitors, contactors, sensors — typically run a few hundred dollars. Major component failures like compressors or heat exchangers cost significantly more. We diagnose the problem first and give you a clear price before any work begins.Repair costs vary depending on what failed and the size of the unit. Minor repairs — capacitors, contactors, sensors — typically run a few hundred dollars. Major component failures like compressors or heat exchangers cost significantly more. We diagnose the problem first and give you a clear price before any work begins.Do you service rooftop units from brands other than Lennox?
Yes. While we're an authorized Lennox dealer and work extensively with Lennox commercial equipment, our technicians are experienced with rooftop units from other major manufacturers as well. If you have existing equipment from another brand, we can service and repair it.Yes. While we're an authorized Lennox dealer and work extensively with Lennox commercial equipment, our technicians are experienced with rooftop units from other major manufacturers as well. If you have existing equipment from another brand, we can service and repair it.How often should a commercial rooftop unit be serviced?
Twice a year is the standard recommendation — once before the cooling season and once before heating season. Regular service keeps efficiency up, catches small problems before they become expensive failures, and extends the working life of the equipment. Our maintenance agreements make it easy to stay on schedule.Twice a year is the standard recommendation — once before the cooling season and once before heating season. Regular service keeps efficiency up, catches small problems before they become expensive failures, and extends the working life of the equipment. Our maintenance agreements make it easy to stay on schedule.
Have a financing question we didn't cover? Contact us or call 773-940-0965.
Don't freeze, call D's… Don't let cost hold off a repair or install that can't wait. Get a free estimate online, or call 773-940-0965.
