Whole-system duct and dryer vent check with before-and-after photos - you see exactly what came out of your vents
That "$99 whole-house special" is a bait ad - the real number appears once they are in your hallway, or the "clean" is a shop-vac at the register. We photograph the inside of your ducts before and after instead.
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AfterRotobrush Duct Repair & Sealing in Chicago: What to Know First
We provide independent Rotobrush duct repair and sealing throughout Chicago, typically completing jobs in one visit with a written price delivered before any panel comes off. Most Rotobrush systems we see are the older Classic II and newer Beast series units, and the ductwork connected to them fails in predictable ways we’ve documented across 52,000 jobs since 2013. Our standard repair range runs $340-$780 for typical residential duct sealing and flex duct repair, with full metal duct restoration higher depending on access. Call (708) 683-3974 for a written estimate - we put our number next to any competitor’s quote under Haven Standard Clause 1.
This page is for Chicago homeowners who bought a Rotobrush air duct cleaning system, had it installed by a previous contractor, and now need the connected ductwork repaired, sealed, or insulated. We also service Lennox, Trane, and Carrier systems, but Rotobrush presents specific challenges we’ll detail below.
How Rotobrush Products Fail - and How We Fix Them
- Classic II blower motor housing seal degradation. The Classic II’s polymer housing flange warps slightly after repeated heat cycles in Chicago’s forced-air systems, breaking the seal where the unit mates to the supply plenum (the sheet-metal box that distributes air to your duct runs). We remove the unit, machine a new flange surface if salvageable, and seal with mastic rated for 200°F continuous - not foil tape, which fails in eighteen months on this joint.
- Beast series flex duct collar separation at the plenum. The Beast’s higher CFM rating (the volume of air it moves per minute) creates more pulsation at the flex duct connection point. In Lincoln Park two-flats and Oak Park bungalows built 1910-1950, we regularly find the original flex duct has pulled entirely free of the collar, dumping conditioned air into joist bays. We reinstall with mechanical fasteners plus mastic, then photograph the repair with the camera we carry on every job.
- Rotobrush vacuum hose port gasket hardening. The rubber gasket where the vacuum hose inserts becomes brittle in Chicago’s dry winter heating seasons, creating a leak path that reduces negative pressure extraction (the suction that actually pulls debris from your ducts). We replace with silicone gaskets rated for -40°F to 450°F - a $12 part that prevents a $400 callback.
- Sheet-metal adapter corrosion at condensate contact points. Rotobrush units installed above basement laundry sinks or near water heaters in Chicago’s older frame houses often show galvanic corrosion where dissimilar metals meet. We fabricate replacement adapters from 26-gauge galvanized or switch to stainless where the original has perforated, then seal with water-resistant mastic.
- Beast Air+ HEPA module ductwork back-pressure splits. The HEPA module adds air-side static pressure (resistance the blower must overcome), which can split poorly supported flex duct at sag points. In Rogers Park and Edgewater vintage buildings with long basement runs, we see this where flex duct was strapped with wire instead of proper supports. We repair the split, add rigid support every four feet, and document the before condition - “Show the photo first. Talk second.”
Our Rotobrush Duct Repair & Sealing Process
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Written price delivered first. We inspect the accessible ductwork, identify the Rotobrush model and its specific failure mode, and provide a written scope with price before any work begins. Haven Standard Clause 1 - no exceptions.
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Photo documentation of existing condition. Every register, every duct run, every plenum joint is photographed before we touch anything. The customer receives these as part of the standard job record.
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Parts decision: OEM vs. quality aftermarket. For Classic II units, OEM gaskets and collars are still available but ship in 5-7 business days. We stock quality aftermarket equivalents that meet the same temperature and pressure specs, and we note the origin of every part on the written invoice. For Beast series units under original warranty, we use OEM to preserve coverage - we are an independent Rotobrush service provider, not authorized by the manufacturer, so we follow warranty-safe practices where they apply.
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Repair, seal, and pressure-test. We complete the mechanical repair, seal all joints with mastic or foil-backed mastic tape as appropriate, and verify with a smoke pencil or digital manometer (a device that measures pressure differences in inches of water column) that the system holds negative pressure at the register.
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Post-repair photo record and written guarantee. We photograph every repaired joint and sealed connection, deliver the complete photo record to the customer, and back the work with the 365-Day Done Right Promise in writing.
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Cleanup and final walkthrough. Technicians are background-checked, uniformed, and identified by name before arrival - Haven Standard Clause 3: Verified Crews. We leave the work area cleaner than we found it.
BeforeAfterWhat Rotobrush Duct Repair & Sealing Costs in Chicago
| Service | Typical Range | What Affects Price |
|---|---|---|
| Flex duct repair (single run, Beast or Classic II) | $340-$520 | Length of run, attic vs. basement access, whether the plenum collar needs replacement |
| Metal duct sealing (mastic, up to 6 joints) | $280-$450 | Corrosion severity, need for adapter fabrication, accessibility |
| Full plenum reseal + Rotobrush remount | $580-$780 | Plenum size, material (galvanized vs. fiberboard), HEPA module presence |
| Duct insulation replacement (condensation damage) | $420-$680 | Linear feet, R-value required, vapor barrier condition |
Prices move with access difficulty, not with neighborhood. A third-floor walk-up in Pilsen with no basement hatch costs more than a ranch in Garfield Ridge with full headroom - we state this in writing before you agree. Call (708) 683-3974 for an exact quote; estimates are free and we provide a Free Second Opinion on any written estimate from another contractor.
Why Chicago Homeowners Call CleanRun Air Duct Cleaning Chicago for Rotobrush Work
We’ve been running jobs in Chicago since 2013, including older two-flats near Logan Square where the original galvanized ductwork still has sheet-metal screws from the Eisenhower era. Tomas Reyes and our crew know the difference between a Rotobrush Classic II with a worn housing seal and a Beast Air+ pushing more pressure than the connected ductwork can handle - because we’ve photographed both conditions hundreds of times.
Our equipment roster includes Rotobrush, Nikro, Abatement Technologies, Honeywell, Aprilaire, and Guardsman - brands customers can verify independently. Every job carries the 365-Day Done Right Promise in writing, not as a policy subject to manager approval. We also service Lennox, Trane, and Carrier systems, so if your Rotobrush was installed as part of a larger HVAC package, we diagnose the full system without sending you to multiple contractors.
FAQs
No - independent duct repair does not void Rotobrush’s equipment warranty, provided we use OEM parts on units still under original coverage and follow manufacturer torque and seal specifications. As an independent Rotobrush service provider, we are not affiliated with or authorized by Rotobrush, so we document exactly which parts we used and where they were sourced, preserving your warranty paper trail. Call (708) 683-3974 if you need help interpreting your warranty terms.
Most residential repairs are completed in two to four hours, including setup, photo documentation, and cleanup. Jobs requiring OEM parts we don’t stock add 5-7 business days for shipping unless you approve a quality aftermarket equivalent that meets the same specs. We state the timeline in writing with the price - no surprises.
Replace when the flex duct is brittle throughout its length, when metal duct shows perforation from corrosion, or when the plenum itself has failed at multiple seams. Repair when the damage is localized to collars, gaskets, or single runs. We show you the photos, explain which category you’re in, and let you decide - we have no incentive to sell replacement when repair will last.
You receive a Documented Photo Record of every duct run, before and after, as a standard deliverable on every visit. We also pressure-test sealed joints and note the reading on your written invoice. If we can’t show it, we don’t charge for it - that’s been our practice since 2013.
Yes - gaskets, collars, and motor housings for Classic II units remain available from aftermarket suppliers and some OEM channels, though lead times vary. We carry the most common failure parts on our trucks and note on every invoice whether we used OEM or aftermarket, with manufacturer name and part number. Call (708) 683-3974 with your serial number and we’ll confirm availability before scheduling.
Ready for a written estimate? Call (708) 683-3974. We’ll put our price next to any competitor’s quote, and every job starts with a written scope before a single panel comes off.
Written by Tomas Reyes, Owner, CleanRun Air Duct Cleaning Chicago at CleanRun Air Duct Cleaning Chicago, serving Chicago and nearby areas.