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Ductwork · airflow · duct cleaning
Ductwork repair, sealing, design and duct cleaning in Milwaukee
A new furnace attached to bad ductwork is still a bad system. One cold bedroom, a hot upstairs, dust everywhere, a furnace that never shuts off: those are usually duct problems, and we find them with measurements, not guesses.
★ 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
Airflow diagnosis: numbers, not opinions
We measure static pressure at the furnace and airflow at the registers, then compare them with what the equipment needs. Most of the time the problem is undersized returns, crushed or disconnected runs, leaky joints in an unfinished basement, or a duct system that was never designed for the second floor. You get a written explanation and a fix with a flat-rate price.
Duct repair, sealing and modification
- Sealing joints and takeoffs with mastic, not tape that fails in two years
- Adding return air where there was never enough, the most common fix for a furnace that overheats
- Resizing and rerouting runs, adding branches for finished basements and remodels
- Balancing dampers so the upstairs finally gets its share in summer
New ductwork for additions, retrofits and conversions
Designed to the load, sized by the airflow each room needs, run cleanly and sealed. If you are adding central air to a boiler-heated house or ducting an addition, we design it on paper first so you can see what it will look like before anything is cut.
Duct cleaning and dryer vent cleaning
Duct cleaning is worth it after a renovation, in a newly bought home, when you can see dust or debris in the ducts, after pests or water, or when allergies flare every time the fan runs. It is not a cure for a dirty furnace or a bad filter, and we will say so. Dryer vent cleaning is a safety item: a lint-packed vent is a fire hazard and makes your dryer run twice as long.
- Whole-house duct cleaning with the vents, trunks and returns, plus the blower and coil on request
- Duct sanitizing available on request
- Dryer vent cleaning
Recent ductwork jobs
Photos from our own jobs, not stock images.
Emergency right now? Call or text 414-595-5175, any hour.
Request service or a free replacement estimate
We call you back during business hours. You get a flat-rate price before any work begins, and repairs are guaranteed for one year, parts and labor.
Rather pick a time yourself? Book a tune-up, free estimate or repair visit online, any time of day.
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What it costs
- Airflow diagnosis: $99 service call on weekdays; $179 nights, weekends and holidays
- Repairs and sealing: flat-rate, approved before work starts, guaranteed 1 year parts and labor
- Duct cleaning and dryer vent cleaning: quoted by the house, free estimate
- New ductwork design and install: free estimate, written proposal
- Duct cleaning, national average (HomeAdvisor): about $388, most jobs $271 to $508; we have not found a Milwaukee-only figure we trust (price guide)
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
Why is one room always cold (or hot)?
Usually a long or undersized duct run, a closed or missing damper, a leaky joint in the basement feeding the room, or no return path when the door is closed. We measure the airflow at that register and fix the actual cause.
Is duct cleaning worth it?
Sometimes. After construction dust, pests, water damage, in a newly purchased home, or when you can see debris in the ducts, yes. If your real problem is a cheap filter or a dirty blower, cleaning the ducts will not help, and we will tell you before you spend the money.
Can you add a return to a room?
Yes, and it is one of the most effective fixes for a house that heats and cools unevenly, or a furnace that overheats and shuts off on its limit.
Do you install ductwork in older homes without any?
Yes. We design the system first, route trunks through closets and chases where possible, and show you the plan before cutting. Where ducts are impractical, a ductless system is often the better answer.
How much does duct cleaning cost in Milwaukee?
HomeAdvisor’s national cost guide puts air duct cleaning at about $388 on average, with most jobs between $271 and $508; we have not found a Milwaukee-only figure we trust. The size of the house and the number of vents drive the price. We quote by the house after a free look. More in our Milwaukee HVAC price guide.
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 our customers say
Word-for-word excerpts from Google reviews, names shortened. Overall: 4.9 stars from 440+ reviews.
5 out of 5 stars
“Called A1 to service my AC unit, Mike was very thorough and walked me through step by step what the issue was.”
Daniel P. · AC service · Google review
5 out of 5 stars
“…without trying to up-charge me for other parts. Incredible energy and took the time to explain next steps, reasoning, and terminology.”
Nathan D. · Service call · Google review
5 out of 5 stars
“He explained everything he was doing along the way as we coordinated while out of town.”
Kelly R. · Furnace and AC · 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: