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.
Rotobrush Air Quality & Sanitizing in Denver: What to Know First
CleanRun Duct Repair & Cleaning provides independent Rotobrush service for air quality and sanitizing across Denver, including mold treatment, bacteria sanitizing, odor removal, and UV light installation. Most Rotobrush jobs in the metro area are completed in a single scheduled visit, with a written price delivered before any work begins. We charge $340-$680 for standard Rotobrush air quality and sanitizing work, depending on system size and contamination level, and every job includes a documented photo record of every duct run.
This page is for Denver homeowners who own a Rotobrush air duct cleaning system and need professional-grade sanitizing, or who are considering Rotobrush-compatible air quality upgrades and want to understand what the work actually involves before inviting a technician inside. Call (720) 799-2292 for a free estimate with a written price.
How Rotobrush Products Fail - and How We Fix Them
- Beast series vacuum motor seal degradation. The Rotobrush Beast and Beast Lite units use a high-RPM vacuum motor with a felt-and-rubber seal assembly that hardens in Denver’s dry climate, typically within 4-6 years of installation. Once the seal cracks, negative-pressure extraction drops by 30-40%, meaning debris and biofilm stay in the duct run instead of reaching the collection bag. We replace the seal with OEM-grade fluorosilicone or, for budget-sensitive jobs, a validated aftermarket equivalent that holds spec to 10,000 feet elevation. Haven Standard Clause 1 applies: written price before the first panel comes off.
- Brush head binding in the RotoVent-Viper line. The Viper’s flexible cable-and-brush assembly is built for tight elbows, but Denver’s older Capitol Hill and Baker neighborhoods have original galvanized duct runs with internal corrosion ridges. The Viper cable frays at the swivel joint after repeated contact with those ridges, dropping brush torque and leaving microbial deposits on duct walls. We inspect the cable with a borescope, replace the entire head assembly if fraying exceeds manufacturer tolerance, and document the before condition in the photo record.
- HEPA filtration bypass in the BrushBeast models. The BrushBeast’s HEPA cartridge is held by a plastic cam-lock frame that warps with heat cycling, common in Denver homes with attic-mounted air handlers where summer attic temps hit 140°F. A warped frame lets unfiltered air bypass the HEPA stage, recirculating mold spores and bacteria through the supply registers. We measure frame flatness with a feeler gauge, replace warped frames with updated ABS composite units, and pressure-test the seal before the job closes.
- UV-C lamp ballast failure in aftermarket retrofits. Many Denver homeowners add third-party UV-C lamps to Rotobrush systems for ongoing sanitizing. The 24V ballasts supplied with budget retrofits fail prematurely at altitude due to reduced air density and less effective cooling; we see this in Park Hill and Stapleton installations especially. We source ballasts rated for 5,000+ feet with thermal cutoff protection, wire them to the Rotobrush control board through an isolated relay, and test output with a UV meter to verify 253.7nm intensity at the lamp surface.
- Condensate pan microbial growth in combined Rotobrush/HVAC setups. When a Rotobrush system is paired with a Carrier or Trane air handler in Denver’s semi-arid climate, homeowners often skip the humidifier season entirely, letting condensate pans dry out and crack. The residual biofilm then releases spores during the first cooling cycle of spring. We treat the pan with EPA-registered bacteriostat, install a Guardsman float-safe pan treatment tablet where appropriate, and photograph the pan condition for the job record. Tomas Reyes has noted that the black sludge pattern in these pans reminds him of condensate conditions he documented in pre-war Queens buildings, though Denver’s mineral content produces a harder, more crystalline residue.
Our Rotobrush Air Quality & Sanitizing Process

- 1
Call and scope. We ask for the Rotobrush model series, year of installation, and the specific symptom: visible mold, persistent odor, post-illness bacteria concern, or allergen spike. We schedule a visit and confirm there is no per-vent pricing, only a flat system price.
- 2
On-site diagnostic with borescope. The technician photographs every plenum, main trunk line, and register before touching equipment. Here is what the camera found. Here is what it costs to fix it. You decide.
- 3
Parts decision: OEM or validated aftermarket. For warranty-active Rotobrush units under 5 years, we default to OEM seals, cables, and HEPA frames. For out-of-warranty systems, we offer quality aftermarket parts from Abatement Technologies or Guardsman with equivalent specs, documented in writing.
- 4
Sanitizing treatment and mechanical repair. We apply the selected treatment, mold remediation, or UV installation, then run the Rotobrush system through a full cycle to verify negative pressure, brush torque, and filter integrity.
- 5
Deliverable: documented photo record and written warranty. The customer receives before-and-after images of every duct run, plus the 365-Day Done Right Promise in writing. Haven Standard Clause 6: Documented Completion.
Before
AfterWhat Rotobrush Air Quality & Sanitizing Costs in Denver
| Service | Typical Range | What Moves the Price |
|---|---|---|
| Standard bacteria/odor sanitizing, single system | $340-$480 | System size, number of registers, contamination severity |
| Mold treatment with HEPA frame replacement | $520-$680 | Extent of mold growth, accessibility of duct runs, parts needed |
| UV-C lamp installation (OEM-compatible) | $380-$560 | Lamp count, ballast type, wiring path to control board |
| Allergen reduction with full brush head service | $420-$580 | Cable condition, brush wear, additional register count |
These are whole-system prices, agreed in writing before work starts. We do not quote per-vent or offer teaser rates that change once the truck is on your driveway. Every estimate includes the documented photo record as standard, not an add-on. Call (720) 799-2292 for your written price.
Why Denver Homeowners Call CleanRun Duct Repair & Cleaning for Rotobrush Work

We are an independent Rotobrush service provider, not affiliated with or authorized by Rotobrush LLC. That independence means we source the part that fixes the problem, not the part a manufacturer wants to move. Our technicians are background-checked and uniformed under Haven Standard Clause 3: Verified Crews, and Tomas Reyes trains each crew lead personally on Rotobrush-specific diagnostics, including the altitude-related failures that Denver’s 5,280-foot elevation accelerates.
When a Rotobrush system is beyond economical repair, we also service Lennox, Trane, and Carrier air quality components, so the conversation shifts to the right solution rather than a forced brand loyalty. Since 2013, we have delivered a written price before every job and a photo record after, with the 365-Day Done Right Promise backing both. No manager approval needed. The guarantee is in writing on every invoice.
FAQs
Rotobrush warranties the original equipment against manufacturing defects for a limited period, typically 3-5 years depending on the series, but they do not cover sanitizing treatments, mold remediation, or UV retrofits performed by independent providers. We document any warranty-eligible mechanical defects we find and advise you on whether to pursue a manufacturer claim or proceed with our repair. Call (720) 799-2292 and we’ll review your serial number against the warranty terms.
We verify results through the documented photo record, showing the condition of every duct run before and after treatment, and by measuring system performance: negative pressure at the plenum, airflow at the furthest register, and UV output in microwatts per square centimeter where applicable. The 365-Day Done Right Promise means if you smell the odor return or see mold regrow, we return and retreat at no charge. Call (720) 799-2292 if you have concerns after the job.
Repair makes sense when the core vacuum motor and brush drive are sound and the failure is isolated to seals, cables, or filtration components, typically under $600 in total. Replacement is the better value when the vacuum motor is failing, the duct run count has grown beyond the unit’s capacity, or you want integrated smart-home air quality monitoring that Rotobrush does not offer. We provide a free second opinion on any written estimate, including replacement quotes from competitors, so you can compare real numbers. Call (720) 799-2292 to bring in your paperwork.
For warranty-active systems, yes, OEM is required to preserve coverage. For out-of-warranty units, validated aftermarket parts from Abatement Technologies or Guardsman perform equivalently at 20-30% lower cost, and we warranty our workmanship on either. We name the manufacturer of every part in the written scope, so you can verify specifications independently before approving the job.
We schedule within 3-5 business days for non-emergency sanitizing and air quality work, with flexibility for homeowners in Cherry Creek, Highlands, and other Denver neighborhoods who need specific arrival windows. Every appointment is confirmed by name: you know which technician is coming before the truck leaves our shop. Call (720) 799-2292 to book your slot and receive your written estimate.
Written by Tomas Reyes, Owner, CleanRun Air Duct Cleaning Denver at CleanRun Air Duct Cleaning Denver, serving Denver and nearby areas.




Before
After
Before
After