
Commercial Rooftop Unit Installation in Howell, MI - Sized Right for Your Building
New building, old RTU at end of life, or a system that never worked right from day one? We spec, install, and start up commercial rooftop units the right way. Call (517) 302-3764.
- Licensed & insured
- 24/7 emergency
- Authorized AirQuest Dealer
- Upfront pricing
Rooftop Unit Installation in Howell
A rooftop unit is the whole HVAC system for most commercial buildings. When it fails, sales stop, tenants complain, and food service risks health code trouble. When it is wrong from the start (undersized, wrong tonnage, wrong static pressure) the bills stay high forever. We install RTUs the right way with real load calcs and clean rigging.
Signs you need rooftop unit installation

Signs an RTU needs full replacement: it is fifteen-plus years old, uses R-22 refrigerant, the compressor has been rebuilt already, the cabinet is rusted through, or repair quotes keep climbing. Buildings with new tenants, added square footage, or new kitchen equipment often need bigger tonnage than what is on the roof today.
Running a failing RTU costs more than replacing it. Efficiency drops five to ten percent a year on a dying unit. Emergency shutdowns in the middle of business hours cost sales and staff time. In restaurants and grocery, a warm building can trigger a health inspection issue. Planning the replacement in the shoulder season is always cheaper than an emergency crane call in August.
We install packaged rooftop units for restaurants, retail, offices, and light industrial buildings. Every install starts with a real load calculation and a static pressure check on the existing ductwork, not a straight tonnage swap. We coordinate the crane, curb adapters where needed, gas and electrical tie-ins, and controls. Startup includes airflow balancing and a written commissioning report.
Rooftop install is one piece of a commercial HVAC plan. Ongoing care is handled with Rooftop Unit Maintenance to keep the new unit inside warranty and running efficiently. Same-day fixes when something quits fall under Rooftop Unit Repair. Everything is on the Commercial HVAC hub.
Our rooftop unit installation options

Rooftop Unit Installation for Howell homes and businesses
Commercial buildings around Howell run the range from strip retail off M-59 to restaurants on Grand River to light industrial in Brighton and South Lyon. Each one has different rooftop access, tonnage needs, and control systems. Michigan winters put big loads on gas heat sections. Summer humidity loads the cooling side hard. We size for the actual building, not a spec sheet number.
We install commercial RTUs across the region, including Hartland, Fenton, Milford, Highland, Ann Arbor, and Lansing.
What to expect

We come out and walk the roof, look at the current setup, and check ductwork. You get a written proposal with equipment options and a schedule. We coordinate the crane and pull permits. Most single-RTU changeouts happen in one day with minimal downtime, scheduled around your business hours where possible. Startup, balancing, and commissioning paperwork are included.
Why choose us for rooftop unit installation
Family-owned in Howell with commercial experience. Michigan Mechanical License No. 7119201, insured, Authorized AirQuest Dealer, twenty-plus years of owner experience. Upfront proposals with no hidden change orders. Same-day emergency service on your existing RTU while the new one is being planned.
Related services
Rooftop Unit Installation questions Howell homeowners ask
How fast can you get out for rooftop unit installation in Howell?
Most rooftop unit installation calls in Howell and the surrounding Livingston County towns are handled the same day. Call (517) 302-3764 and we will give you a real arrival window, not a four-hour block.
Do you charge a diagnostic fee for rooftop unit installation?
Yes, there is a flat diagnostic fee for the trip and the time it takes to identify the problem. If you approve the repair, we roll that fee into the total. You always see the number before we start work.
Are you licensed and insured?
Great Lakes Comfort holds Michigan Mechanical Contractor License No. 7119201 and carries full liability and workers' comp insurance. We pull permits when the job requires one.
Do you offer financing on rooftop unit installation?
We offer financing on qualifying installations and larger repairs, including 0% promotional plans for approved credit. Ask when you call and we will walk you through the options.
Rooftop Unit Installation across Howell and Livingston County
Based in Howell, MI - dispatching to Brighton, Hartland, Fenton, Milford, South Lyon, and the surrounding communities.
Request service - we'll respond within 48 hours.
Need help faster? Give us a call - a real person answers 24/7 and we can often get you on the same-day schedule.
Not urgent? Fill out the form and we'll get back to you within 48 hours (usually much sooner during business hours).
Call (517) 302-3764Open 24 hours - 7 days a week
Get help today
Old RTU on its last legs? Do not wait for it to quit mid-shift. Call (517) 302-3764 today for a commercial rooftop installation quote.
See more about Great Lakes Comfort, your local HVAC contractor in Howell, MI.
