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Air Duct Cleaning in Janesville, WI

Janesville, WI is the Rock County seat, on the Rock River between Beloit and Edgerton. Pro Air is based in Madison and comes to Janesville for whole-system duct cleaning and dryer vent work — the owner on the job, the price in writing before he starts.

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Serving Janesville from Madison

Air Duct & Dryer Vent Cleaning in Janesville, WI

Janesville is the biggest housing stock we serve outside Madison: 28,430 housing units at the 2020 census, and most of them built while the city was a factory town. The General Motors assembly plant ran from 1919 until December 2008, and the ranches, split-levels and two-stories that went up around it still carry their original sheet-metal trunk lines.

Older Janesville is different work. Courthouse Hill and the Old Fourth Ward hold houses from the 1840s through the 1930s, and almost every one has had a gravity furnace or a boiler replaced by forced air at some point. The furnace was new; the ducts that were cut in for it usually were not, and they have never been opened since.

Both kinds of system get the same treatment from us: registers, returns and trunk lines cleaned under negative pressure, the dryer vent cleared in the same trip if you ask for it, and a set of photos showing what left the house.

Janesville Areas We Serve

Courthouse Hill Old Fourth Ward Columbus Circle Look West South Main Street district Jefferson Avenue district Riverside Park area Palmer Park & Rotary Gardens side North-east subdivisions Rockport Park side

On a street we have not named? Call Us: 608-285-2825; if it is in Janesville, we come.

Janesville Homes

Courthouse Hill’s Ducts Outlived Three Furnaces

The Old Fourth Ward Historic District, south-west of downtown, holds roughly 1,100 buildings put up between the 1840s and 1930, from Italianate and Queen Anne houses for the mill owners to the concrete-block workers’ cottages of 1905 to 1910 and the Foursquares and bungalows that followed. Courthouse Hill, listed in 1986, is the same story on the other side of the river. None of these houses was built with a duct in it.

What they have now is a forced-air retrofit: a furnace in the basement, trunk lines run along the joists, and supply branches snaked up through closets and old chimney chases to the second floor. Those retrofits are often forty or fifty years old themselves, and because they were fitted into a finished house they took the shortest route, not the cleanest one. Long horizontal runs, returns cut into floor grilles, and registers painted over during every redecoration since — that is what we open up on a Courthouse Hill job, and it is why the before-and-after photos here are worth keeping.

What We Look For in Janesville

Retrofit trunks in 1840s–1930s homes Original ducts in GM-era ranches Painted-shut floor registers Long basement returns Second-floor branches through old chases Lint in long dryer runs

Own one of these houses? Call Us: 608-285-2825 and describe the furnace and the register count; the quote comes back in writing.

Janesville Housing

Janesville Homes, and What They Mean for the Job

Janesville was founded in 1835 by Henry F. Janes, built its first dam on the Rock River in 1844 and became a city in 1853. The General Motors plant opened in 1919 and closed on 23 December 2008, and Parker Pen closed its Janesville factory in 2000. The 2020 census counted 65,615 people and 28,430 housing units, with a homeowner vacancy rate of 0.8%; the city’s own housing affordability report for 2024 recorded 599 residential permits that year, 91 of them for new single-family homes, against a vacancy rate of 3.4%.

A century of building in one city means three very different duct systems, and the year the house went up tells us most of what we need before we arrive. This is what the housing stock says to expect, not a claim about your address — every system is inspected before it is quoted.

  1. 1840s–1930s: Courthouse Hill, Old Fourth Ward, Columbus Circle

    Boilers and gravity furnaces originally, forced air added decades later. Expect long retrofit runs, few returns, plaster dust from every renovation since, and registers that have not lifted off the floor in years. We look before we quote.

  2. 1940s–1970s: the plant-era ranches and split-levels

    The bulk of Janesville’s housing. Galvanized trunks in good condition, feeding registers that have collected fifty to seventy years of dust, pet hair and remodel debris. These are the most satisfying cleanings we do and the photos usually show it.

  3. 1990s onward: the north-east and south-east subdivisions

    Flexible branch runs and lined trunks, worked with air whips rather than brushes so nothing tears. If the house has never been cleaned since it was built, the first job clears the drywall dust and sawdust the builder’s crews left behind.

What this means for your quote: a GM-era ranch on one furnace is a straightforward count of registers and returns. A Courthouse Hill two-story gets an inspection first, because the retrofit decides the work.

Why Janesville Picks Pro Air

Local, Honest, and Thorough

Honest About Where We Are

Pro Air is a Madison company, and we say so. Janesville gets the same owner and the same 7,000 CFM machine, not a subcontractor.

Commercial Equipment

7,000 CFM push-pull cleans the whole system.

No Upsells

Honest, upfront pricing — only what you need.

Owner-Operated

Luis runs every job himself. No call center, no rotating crews.

Track Record

Where Our Reviews Come From

Pro Air has earned 180+ five-star Google reviews since 2018 serving Northern Indiana. Every one of them was earned in Indiana, and none is a Janesville job; the first Janesville reviews will be posted when they are real. Read how Pro Air got here.

Janesville FAQs

Janesville Duct & Dryer Vent Questions, Answered

Booking, pricing and timing in Janesville

How is air duct cleaning priced for a Janesville home?

From the number of furnaces and the count of supply registers and returns, plus the trunk run, and the figure is put in writing before the visit. A plant-era ranch on one furnace can usually be priced on the phone; an older house on Courthouse Hill or in the Old Fourth Ward is inspected first, because how the forced air was retrofitted decides the job. Send the address and the quote comes back written down.

How long does a whole-system duct cleaning take in Janesville?

Most single-furnace Janesville homes take two to three hours. A two-story with a long retrofit trunk, two returns or a second furnace takes longer and is quoted that way; adding a dryer vent cleaning to the same visit usually adds less than an hour because the equipment is already set up.

Can I book the dryer vent and the ducts in one Janesville visit?

Yes, and it is the most common way Janesville jobs are booked. Both get their own before-and-after photos, and the written price covers both.

Do you take on duplexes and small apartment buildings in Janesville?

Yes. Each unit is priced by its own air handler, and for buildings with several dryers the per-unit dryer vent service comes with documentation for each door, which is what a property manager needs on file.

Janesville homes, codes and conditions

Are the original ducts in a 1950s Janesville ranch worth cleaning, or should they be replaced?

Almost always worth cleaning. The galvanized sheet metal in a plant-era ranch is usually sound; it is the contents that have aged. Fifty to seventy years of dust, dander and remodel debris come out under negative pressure, and a full-system cleaning costs a fraction of new ductwork. What we look for on inspection is a disconnected joint or a crushed branch, and we show you either before quoting.

What is different about cleaning ducts in an Old Fourth Ward or Courthouse Hill house?

The house predates its ductwork. Forced air was added to these 1840s-to-1930s homes long after they were built, so the runs are long, the returns are few and the branches climb through old closets and chimney chases. We inspect the layout first, clean through the existing registers and access points, and nothing we do touches the structure of a historic house.

Does the Rock River make Janesville basements damp enough to affect the ducts?

Homes near the river and on low ground can run damp, and a damp basement makes the dust inside a return duct cling and hold a musty edge. Cleaning removes that material. If the smell comes back quickly, the water is the problem, not the ducts, and we will tell you so rather than sell you a sanitizing treatment you do not need.

What does Wisconsin code require for a Janesville dryer vent?

The Wisconsin Uniform Dwelling Code deals with it at SPS 323.14(2). In plain terms the vent must be a smooth, rigid metal duct; the only flexible metal allowed is a short connector at the dryer that is not hidden in a wall or floor; and the run may be no longer than the dryer maker permits after each elbow has been counted against the total. A great many Janesville basements still carry the foil hose that rule retired, and you will see it in the photos when we clean the run.

Does duct cleaning help with radon in a Janesville basement?

No. Radon needs a test and, if the level is high, a mitigation system; duct cleaning removes dust, dander and debris and does nothing to the gas. We say this plainly because the two get confused in sales pitches.

Why Janesville homeowners choose Pro Air

Who actually does the work on a Janesville job?

The owner, start to finish. Luis quotes it, cleans it and photographs it; there is no crew and no call center between you and the person in your basement.

Why does a 7,000 CFM machine matter for a Janesville two-story?

A retrofit trunk in a Courthouse Hill two-story runs from the basement to the second floor, and the dust we knock loose up there has to travel the whole way back down and out. A machine pulling 7,000 CFM holds that entire run under vacuum at once; a portable unit clears the one register it is parked at and moves the rest of the dust along the trunk.

Will you push add-ons on a Janesville job?

No. Two things can be added to a cleaning and both have a trigger: sanitizing when a system still smells after it is clean, and a UV-C lamp when the coil shows moisture or growth. Absent the trigger, neither is raised, and the written figure is the whole price.

Which parts of Janesville do you cover?

All of the city, from the historic districts around the courthouse and the Old Fourth Ward to the newest subdivisions on the north-east and south-east edges, and the towns around it: Edgerton, Evansville and Stoughton are on the same routes.

Get Started

Ready for Cleaner Air in Janesville?

Call the owner directly, or send the form and get a written price back.

608-285-2825 Madison, WI — Dane County & south-central Wisconsin Mon–Sat: 7AM – 7PM