Commercial · rooftop units · maintenance plans
Commercial HVAC in Milwaukee: rooftop units, restaurants and small buildings
Restaurants, shops, offices, small warehouses and multi-tenant buildings across Milwaukee and Waukesha counties. One accountable contractor who answers the phone, not a dispatch center.
★ 4.9 on Google · 440+ reviews | BBB A+ Accredited | Wisconsin-registered HVAC contractor | Veteran-owned | Since 2014
Flat-rate price first
You approve the number before work starts
24/7 emergency line
Rings Mike’s cell, nights and weekends
Free replacement estimates
Written proposal with options, same day
Lennox & Rheem dealer
Every brand serviced and repaired
Rooftop unit repair and replacement
We repair RTUs of every brand: compressors, fan motors, economizers, gas sections, control boards and refrigerant leaks, with a flat-rate price before we start. When a unit is at the end of its life we handle the replacement end to end: sizing, curb adapters, crane scheduling, gas and electrical, startup and the paperwork for your records.
- Carrier, Lennox, Rheem, Trane, York, Daikin and more
- Economizer and ventilation repairs that fix the stuffy-room complaints
- Replacement proposals with efficiency, cost and rebate options in writing
- Repairs guaranteed for one year, parts and labor
Maintenance plans that keep you open
A rooftop unit that is checked twice a year rarely dies on a Friday in July. Our maintenance plans cover filters, belts, coils, drains, refrigerant charge, electrical connections and a written condition report each visit, with priority response when something does go wrong.
- Spring and fall visits scheduled around your hours
- Filter and belt programs sized to your building
- A written report after every visit so property owners and managers know what they own
Restaurants, shops, offices and property managers
- Restaurant HVAC, where a dead unit means a closed kitchen
- Split systems and ductless equipment for offices, server rooms and tenant spaces
- Unit heaters for shops and warehouses
- One point of contact, written proposals and photos of the work for property managers with multiple buildings
Recent commercial jobs
Photos from our own jobs, not stock images.
Equipment down right now? Call or text 414-595-5175, any hour.
Commercial service request
Tell us about the building and we will call you back during business hours. You get a flat-rate price before any work begins.
By submitting you agree we may call or text you about your request. No spam, ever.
What it costs
- Service call: flat fee, quoted when you call
- Repairs: flat-rate, approved before work starts, guaranteed 1 year parts and labor
- Maintenance plans: quoted by the building, free walkthrough
- Replacement estimate: free, in writing
Related services
How it works
What happens when you call A-1
1
You call or text, any hour
A person answers 414-595-5175, not a call center. We ask a few quick questions and give you a real arrival window, not a guess.
2
We find the actual problem
We test before we replace anything and show you the readings, so you can see what failed and why.
3
You approve a flat-rate price
You get the price before any work starts, with repair and replacement options in writing when both make sense. No hourly surprises.
4
We fix it, test it and clean up
Most repairs are finished on the first visit. We test the system, clean up after ourselves and explain what we did.
Specials, financing and rebates
Comfort you can afford, all year.
Everyday offers with no expiration date. Mention the one you want when you book; details are on the Specials page.
$89
Precision Tune-Up
Furnace or AC. A full safety and efficiency check before the season hits, with a written report of what we found. Book it online.
$500 off
A new furnace or AC install
Lennox and Rheem high-efficiency systems, installed to code and permitted when required, with our 10-year parts and labor warranty on installs registered with the manufacturer.
$1,000 off
Furnace + AC bundle
Replace both at once and save $1,000 instantly on a qualifying high-efficiency furnace and air conditioner package.
0% APR for 18 months
Through Marine Credit Union on qualifying installs, on approved credit; no down payment, 18 equal monthly payments. Wells Fargo and our in-house plan are also available.
Already have a replacement quote? Get a free second opinion.
We will give you our own written replacement estimate, free. If we think a repair makes more sense than a new system, we will tell you.
Never think about a tune-up again: join the A-1 Comfort Club.
A yearly maintenance visit for each system and priority on no-heat and no-cool days, plus 15% to 20% off repairs on the higher plans. From $150 a year for one system.
Why Milwaukee calls A-1
Big-company standards. Local-shop accountability.
Flat-rate pricing, quoted first
You approve the number before a tool comes off the truck. No hourly surprises, no upselling.
24/7, and no call center
After-hours calls ring Mike’s cell, not a call center. If he is on another call, text or leave a message and you hear back quickly.
Authorized Lennox and Rheem dealer
Factory-backed equipment and warranties, and we service every brand you already own: Carrier, Trane, Goodman, York, Bosch, Mitsubishi and more.
Repairs guaranteed 1 year, installs 10
Every repair is guaranteed for one year, parts and labor. New Lennox and Rheem installs registered with the manufacturer carry a 10-year parts and labor warranty, with limited lifetime heat exchanger coverage on select models.
State-registered, veteran-owned
Wisconsin Registered HVAC Contractor #1304500, BBB A+ accredited, NATE-certified technicians, and a crew of eight with 115+ years in the trade. One shop in South Milwaukee since 2014.
4.9 stars from 440+ neighbors
Every review is public, including the critical ones, and we reply to them. Judge us by the whole record.
Good to know
Frequently asked questions
Do you offer commercial maintenance agreements?
Yes. Twice-a-year service on each unit, a written condition report, and priority response for plan customers. We quote by the building after a short walkthrough.
How fast can you replace a rooftop unit?
Common sizes are often available within days; crane scheduling usually sets the date. We can keep an aging unit limping along while the replacement is on the way.
Can you work after hours so you don’t disrupt my business?
Yes. Early mornings, evenings and weekends are routine for restaurants and retail. We schedule around you.
What areas do you cover for commercial work?
Milwaukee County and Waukesha County.
Are your repairs guaranteed?
Yes. Every repair is guaranteed for one year, parts and labor. If something we fixed fails within that year, call us and we make it right at no charge.
Reviews
What business and building owners say
Word-for-word excerpts from Google reviews, names shortened. Overall: 4.9 stars from 440+ reviews.
5 out of 5 stars
“A-1 was onsite very soon after our call. Our technician, Klod, identified & resolved the issue quickly so we had minimal downtime.”
Deb · Commercial repair · Google review
5 out of 5 stars
“This is our second time using their services replacing a large AC Unit for our business, and can not be happier.”
Benny’s Cafe · Commercial AC replacement · Google review
5 out of 5 stars
“They installed four furnaces across my building, and the whole process was smooth, easy, and professional from start to finish.”
Lawrens S. · Four furnaces, one building · Google review
Read them all on Google
These are a few highlights. Google shows every review, including the critical ones, and we reply to them. Judge us by the whole record.
Ready when you are: