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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Before
AfterRotobrush Coil Cleaning: The Denver Owner’s Guide
Rotobrush coil cleaning in Denver typically runs $340-$580 for a complete evaporator or condenser coil service when paired with full duct cleaning, or $180-$290 as a standalone coil treatment. We stock Rotobrush-compatible coil cleaning attachments and solutions on every truck, and most jobs are completed in a single visit. You’ll usually discover the need when your upstairs vents blow warm in July despite the compressor running, or when your energy bill spikes 20% without explanation.
Which Rotobrush Models This Applies To
Rotobrush builds two distinct coil cleaning platforms, and matching the right one matters. The Rotobrush BrushBeast and BrushBeast 2.0 use a quick-connect 2.5-inch collar for coil wands; the older Rotobrush Classic and Rotobrush aiR+ require a threaded 2-inch adapter that Rotobrush phased out after 2019. Check the black label on your vacuum motor housing: “BB2” or “BB2.0” means BrushBeast series, no suffix means Classic or aiR+.
The OEM coil wand (Rotobrush part CC-WAND-25) runs $89-$120 retail and fits BrushBeast units with the quick-connect. We also carry a quality aftermarket equivalent from Guardsman that matches the same 25-inch reach and 360-degree spray pattern at a lower parts cost. For Classic owners, we fabricate the adapter on-site or source the discontinued Rotobrush fitting through our Nikro distributor. CleanRun Air Duct Cleaning Denver is an independent service provider, not affiliated with Rotobrush.
One Denver-specific gotcha: the dry climate here means calcium deposits build on coil fins faster than in humid markets, so we spec a foaming cleaner with chelating agents (not just detergent) for Front Range water chemistry.
Signs Your Rotobrush Coil Cleaning Is Failing
- Uneven cooling room-to-room. A partially blocked evaporator coil restricts airflow to specific duct runs; the camera often shows a debris dam right at the A-frame center where the Rotobrush wand couldn’t reach on the last cleaning.
- Ice formation on refrigerant lines. When coil fins are packed with pollen and construction dust, the system can’t exchange heat. The ice you see outside starts inside, and running it longer only drives the freeze deeper into the coil.
- Musty startup smell after the AC’s been off. Organic matter trapped between fin rows breeds in Denver’s occasional humidity spikes. A Rotobrush coil treatment with proper biocide rinse eliminates it; surface-only spraying just pushes the problem deeper.
- Compressor short-cycling. The unit kicks on, pressure builds too fast because the coil can’t breathe, and the safety switch shuts it down. Repeat ten times an hour. The compressor takes the abuse, but the coil is the root.
- Visible gray mat on fins when you remove the blower panel. This is past the point of filter blame. In Denver’s newer builds, we’ve pulled 3-inch debris mats from coils in homes less than four years old, especially downwind of active construction in neighborhoods like Stapleton or Central Park.
BeforeAfterReplacement Cost & What’s Included
| Service | Price Range (Denver) | What’s Included |
|---|---|---|
| Rotobrush coil cleaning, standalone | $180-$290 | Coil access, foaming cleaner application, Rotobrush agitation, rinse, drain pan treatment, photo record |
| Coil cleaning + full duct cleaning package | $340-$580 | Above plus full negative-pressure extraction of all duct runs, register cleaning, plenum inspection |
| Coil cleaning + duct repair/sealing | $520-$840 | Above plus mastic sealing of accessible leaks, register boot repair as needed |
The range depends on coil location (attic A-frame vs. basement horizontal), access panel requirements, and whether the drain pan needs separate treatment. Haven Standard Clause 1: the written price is delivered before any work starts. The 365-Day Done Right Promise covers the cleaning effectiveness, not just the parts. Every job concludes with a Documented Photo Record of the coil before and after, delivered as part of your standard job record.
DIY or Call Us?
What you can safely check: verify your filter MERV rating isn’t choking airflow (nothing above 13 on a standard residential blower), and confirm the outdoor condenser isn’t packed with cottonwood seed or construction dust. Both are visible without tools.
Where DIY goes wrong: evaporator coils live behind sealed sheet metal, often above a furnace with live gas and electrical connections. The foaming cleaners sold at hardware stores are formulated for outdoor condensers, not indoor evaporators, and residue left in the drain pan corrodes galvanized steel. We’ve replaced three drain pans this year in Denver homes where a well-intentioned owner used the wrong chemistry.
Here is what the camera found. Here is what it costs to fix it. You decide. Call (720) 799-2292 for a written estimate.
FAQs
Typically 2-3 years in Denver’s dry climate, though homes near active construction or with pets may need it annually. The calcium and silica in Front Range water accelerate fin degradation if cleaning is deferred past three years. Call (720) 799-2292 and we’ll put a maintenance interval in writing based on your specific system.
Individual bent fins can be straightened with a fin comb, but cracked or corroded coil tubing requires replacement, not cleaning. We photograph the full coil surface before quoting; if replacement is needed, we’ll show you the damage and deliver a written price for that scope instead. Call (720) 799-2292 for the photo inspection.
Most Rotobrush coil cleanings take 90 minutes to 2.5 hours, depending on coil location and how much debris has accumulated. Attic A-frames in older Capitol Hill homes add access time; horizontal basement coils are usually faster. We stock the equipment and chemistry on every truck, so there’s no return visit.
Yes. We carry Rotobrush-compatible coil wands, quick-connect adapters, and foaming cleaner concentrate on every service vehicle. For discontinued Classic-series adapters, we fabricate or source through our Nikro distributor, usually without delaying the job. The Guardsman aftermarket wand is also available if you prefer a lower parts cost with equivalent reach and pressure rating.
Written by Tomas Reyes, Owner, CleanRun Air Duct Cleaning Denver at CleanRun Air Duct Cleaning Denver, serving Denver and nearby areas.