Fast, Reliable HVAC Cleaning Across Denver
HVAC cleaning in Denver typically costs $280-$650 for a full system, with most jobs completed in a single visit by our background-checked technicians. We answer calls live 24 hours a day, and we carry the right equipment for Denver’s unique housing stock, from 1890s Denver Squares to post-war ranch homes. Call (844) 685-6342 for a free estimate with upfront pricing before we lift a single tool.
We’ve been driving to Denver jobs since 1984. We know the difference between a Capitol Hill Victorian with original octopus-furnace ductwork and a 1960s ranch off Colfax with galvanized sheet-metal runs. That knowledge matters because the wrong equipment on the wrong system leaves debris behind or damages what it touches. We’re not learning your neighborhood on your dime.
Why Bellows Air Duct & Vent Co. Is Denver’s Preferred HVAC Cleaning Company
Denver homeowners have called us back for 42 years because we show up when we say, we show the price before we start, and we stand behind the work. Our HVAC Cleaning team carries camera equipment on every truck. You see the inside of your ducts before we touch them and after we’re done. No claim without proof.
Our 90-Day Done Right Promise is stamped on every job in writing. If something’s not right, we return at no charge. No paperwork to file, no argument. That’s been our way since Ray Castillo founded Bellows in 1984, and it’s why customers from Lakewood to Commerce City still refer their neighbors.
Calls ring to a live person, not a voicemail tree, 24 hours a day. Most Denver jobs finish in one visit. Our technicians are uniformed, background-checked, and trained on the specific failure modes of Front Range housing.
Our HVAC Cleaning Services in Denver
Evaporator Coil Cleaning
Denver’s semi-arid climate averages under 15 inches of annual rainfall, and that low humidity keeps fine dust and pollen particles airborne longer before they settle. Your evaporator coil acts as a filter whether you want it to or not, and when it cakes with debris, airflow drops and your compressor works harder at 5,280 feet where it’s already laboring against thinner air. We clean coils with foaming agents that won’t corrode aluminum fins, then verify airflow improvement with before-and-after camera documentation. A typical evaporator coil cleaning in Denver runs $180-$320.
Blower Cleaning
The blower motor and wheel move every cubic foot of air your system handles. In Denver’s older homes, especially the pre-1950s stock in 80211 and 80212, we’ve found blowers packed with construction debris from decades-old renovations and fine particulate from Front Range dust storms. We remove the assembly, clean the wheel and housing, and re-balance before reinstall. Most blower cleanings in Denver fall between $150-$275.
Condenser Cleaning
Your outdoor condenser faces Denver’s hail, cottonwood fluff from the South Platte corridor, and the same fine dust that coats everything else. We wash coils with low-pressure foaming cleaner, straighten bent fins, and clear the base pan so meltwater drains properly through freeze-thaw cycles. Condenser cleaning in Denver typically costs $120-$220 as a standalone service, or it’s bundled with full-system cleaning.
Air Handler Cleaning
Air handlers in Denver homes often sit in basements or crawl spaces where our 40°F+ daily temperature swings open seam gaps and pull unfiltered surrounding air into the supply stream. We clean the full cabinet, including the drain pan where standing water breeds microbial growth, and we inspect the filter rack for bypass gaps that render your filter useless. Air handler cleaning in Denver generally runs $200-$380 depending on accessibility and condition.
Coil Treatment
After cleaning, we apply a non-corrosive antimicrobial treatment to evaporator and condenser coils that inhibits growth for the season ahead. In Denver’s dry climate, this isn’t about moisture control, it’s about the organic debris that accumulates between cleanings and provides a foothold for odor and efficiency loss. Coil treatment adds $45-$85 to a cleaning service.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Denver
We stock parts and specify equipment from Honeywell and Aprilaire for Denver installations, and we clean with professional-grade Rotobrush and Nikro systems that handle both standard ductwork and the irregular plenums common in Denver’s retrofitted housing. We don’t show up hoping we have what your system needs. Our trucks carry the inventory for same-day completion on most Denver jobs.
Common HVAC Cleaning Problems We See in Denver Homes
- Asbestos-containing insulation on original octopus plenums. In Capitol Hill, Curtis Park, and Five Points, we regularly encounter pre-1960 homes where the original gravity-furnace plenum still sits in the basement with deteriorating asbestos wrap. This is a full stop-work condition. We refer to certified abatement before any cleaning proceeds. National franchise crews rushing flat-rate jobs often miss this on the estimate call.
- Oversized, irregular plenums that trap debris. The 1950s forced-air retrofits in Denver Squares and Craftsman bungalows created plenums and trunk lines that don’t match modern equipment dimensions. Standard brushes and whips skate past the corners where debris collects. We size our Rotobrush attachments to the actual duct geometry, not a textbook diagram.
- Open or failing seams on galvanized ductwork. Post-war ranch homes in 80214 and 80215 often have original galvanized sheet-metal ducts with mastic that’s dried and cracked over 60+ years. Clean a system without sealing those seams, and it immediately recontaminates with basement or crawl-space air. We seal before we leave.
- Fine particulate accumulation from wildfire smoke events. Denver’s bowl geography traps Western U.S. wildfire smoke each summer and fall. We’ve seen systems that were clean in May require full recleaning by October. The particles are small enough to pass standard filters and embed in coil fins and blower wheels.
Pricing for HVAC Cleaning in Denver, CO
| Service | Typical Denver Range |
|---|---|
| Full HVAC system cleaning (coils, blower, air handler) | $280-$650 |
| Evaporator coil cleaning only | $180-$320 |
| Blower cleaning only | $150-$275 |
| Condenser cleaning only | $120-$220 |
| Air handler cleaning only | $200-$380 |
| Coil treatment (add-on) | $45-$85 |
What moves you within these ranges: accessibility (crawl space vs. utility room), the amount of debris buildup, whether sealing or repair work is needed, and if your system requires the extended reach equipment for irregular ductwork. We disclose the full price before starting. The number on the phone is the number on the invoice. Our $89 Seasonal Tune-Up is available for systems that don’t yet need full cleaning. Seniors and veterans receive a permanent 5% discount.
Call (844) 685-6342 for a free estimate. Estimates are free. No obligation.
We Also Serve Cities Near Denver
Our HVAC Cleaning in Denver coverage extends to Lakewood, Wheat Ridge, Commerce City, and Englewood. Same trucks, same technicians, same upfront pricing and 90-Day Done Right Promise. If you’re in these surrounding communities, we route from our Denver-area jobs and can often offer same-day or next-day scheduling.
Serving Denver, CO - Our Local Coverage Area
We’re based in the Denver area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - HVAC Cleaning in Denver
Denver’s 5,280-foot elevation and semi-arid climate create conditions that accelerate HVAC contamination. The 40°F+ daily temperature swings expand and contract sheet-metal ductwork enough to open seam gaps, drawing unfiltered air from crawl spaces and basements. Meanwhile, low humidity keeps fine dust and allergen particles suspended in indoor air far longer before they settle into duct interiors. Most Denver homeowners benefit from cleaning every 2-3 years rather than the 3-5 year interval typical in humid, lower-elevation cities. Call (844) 685-6342 to discuss your system’s condition.
We identify these conditions during our pre-cleaning camera inspection, but we do not disturb asbestos-containing materials. If we find deteriorating asbestos wrap on an original octopus plenum, we stop work and refer you to a certified abatement contractor. This is a legal requirement, not a preference. In a 1920s Denver Square on Marion Street in Capitol Hill (80203), we found exactly this scenario. After abatement clearance, we returned to clean the mismatched trunk lines with a Rotobrush system, seal the irregular plenums, and install a new Aprilaire filter to trap the fine particulates that Denver’s low humidity keeps airborne longer. Call (844) 685-6342 and we’ll inspect before quoting.
Yes, but it requires equipment sizing that flat-rate crews often don’t provide. The 1950s forced-air retrofits in Denver Squares created oversized plenums and mismatched trunk lines that standard brushes can’t navigate. We carry multiple brush diameters and flexible whip attachments, and we camera-verify that corners and offsets are actually clean, not just brushed past. A 1920s Denver Square full-system cleaning typically runs $450-$650 due to the additional time and specialized equipment. Call (844) 685-6342 for an exact quote after inspection.
Denver’s bowl geography traps wildfire smoke from Colorado and Western U.S. fires each summer and fall, driving repeated post-smoke duct cleanings that are essentially unheard-of in flatland metros. The fine particulate matter is small enough to pass standard filters and embed in coil fins, blower wheels, and duct interiors. We’ve cleaned systems that were serviceable in May and heavily contaminated by October. If your home was exposed to significant smoke events, we recommend inspection regardless of your normal cleaning interval. Call (844) 685-6342 to schedule.
Yes, and we pay particular attention to seam integrity. The post-war ranch homes in eastern 80214 and 80215 frequently have original galvanized ducts with mastic that has dried and failed over 60+ years. Cleaning without sealing those open seams simply gives you clean ducts that immediately recontaminate with unfiltered basement or crawl-space air. We include seam inspection and basic sealing in our full-system cleaning quote. Standalone duct sealing for these systems runs $180-$350 depending on linear footage. Call (844) 685-6342 for a free estimate.
Written by Ray Castillo, Owner at Bellows Air Duct & Vent Co., serving Denver since 1984.