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
AfterAir Duct Cleaning in Waltham, MA
Waltham homeowners calling about clogged dryer vents are usually dealing with one of two houses: a triple-decker off Moody Street with a retrofit exhaust that runs twenty feet through a wall cavity, or a mill-conversion condo along the Charles River where the original lint path was never designed for modern high-heat dryers. Both produce the same call, and both cost more to fix when the lint pack has been building for years. Dryer vent cleaning in Waltham runs $120 to $260 for a standard single-family home and is the cheapest insurance you’ll ever buy against a $6,000 fire loss. Call (806) 606-6902 and we’ll give you a written price before a single panel comes off.
Why Waltham Homes Are Different
Waltham’s dense stock of late-19th and early-20th century triple-deckers and two-family homes, concentrated around the Moody Street corridor and the South Side, were originally built with steam or hot-water radiator heat and had no ductwork whatsoever. When owners and landlords retrofitted central forced-air and AC systems over the past few decades, installers had to thread flex duct through spaces that were never designed for it: wall cavities, sagging dropped ceilings, uninsulated crawlspaces. The result is long, poorly-supported runs that sag, collect debris faster, and are far harder to clean than purpose-built systems in newer suburbs a few miles west.
Waltham sits in the Charles River valley, and lower-elevation neighborhoods near the river experience measurably higher ambient humidity than surrounding upland communities. That persistent moisture load increases the risk of mold and biofilm accumulation inside ductwork, especially in older flex-duct retrofits that sag and allow condensation to pool. Technicians servicing the mill-conversion condos along the Charles, where HVAC was retrofitted into uninsulated 19th-century brick cavity walls, routinely encounter heavy condensation-related debris and mold in ducts that have no insulating sleeve. It’s a failure pattern almost absent in the purpose-built colonials and ranches a few miles further out.
Our Main Waltham Services
Most Waltham calls start with one of two services, and both matter for different reasons in this city’s housing stock.
Air Duct Cleaning in Waltham
Retrofit ductwork in Waltham’s older homes collects a mix of construction dust, lint, and river-valley humidity residue that a standard register vacuum won’t reach. We run a camera down every duct run before and after, so you see the 3-inch debris build-up at the first elbow, then you see it gone. For the full scope of this service, see Air Duct Cleaning in Waltham.
HVAC Cleaning in Waltham
In Waltham’s mill conversions and tight retrofits, the evaporator coil and blower share the same confined space as years of drywall dust and pet dander. We clean the components that move your air, not just the passages it travels through. Details are on HVAC Cleaning in Waltham.
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.
BeforeAfterDryer Vent Cleaning in Waltham
Dryer vent cleaning in Waltham matters more here than in most Massachusetts towns because the housing stock fought the installation. A triple-decker off Moody Street will often have a flex duct running eighteen or twenty feet from the dryer to an exterior wall, through a ceiling chase or down a wall cavity that was never meant to carry exhaust. In river-valley humidity, that long run accumulates lint faster, compacts it harder, and holds the moisture that turns a slow dryer into a fire risk. This is the service where Dryer Vent Cleaning done wrong just makes noise; done right, it removes a documented hazard. We photograph the full vent run before and after, every time.
Dryer Vent Inspection
Signs you need it
Clothes take two cycles to dry, the dryer feels hot on top, or you smell must when the machine runs; all three are signs the vent run is narrowed by packed lint or crushed flex.
What it costs in Waltham
An inspection-only visit in Waltham runs $79 to $140, and we credit that amount toward cleaning if you book within 30 days.
How we do it
We feed a camera down the full vent path from the dryer connection to the exterior termination, measuring the restriction and photographing the inside before any cleaning begins.
Lint Removal
Signs you need it
The visible lint screen is clean but the dryer still bakes, or you can see lint piled at the exterior vent hood and the flap doesn’t open fully.
What it costs in Waltham
Full lint removal on a standard single-family Waltham home runs $120 to $260; long runs over 20 feet in triple-deckers can push to $220 to $340.
How we do it
We run a Rotobrush or Nikro rotary whip through the entire run under negative pressure, pulling loosened lint back to our HEPA-filtered collector, not into the house or the wall cavity.
Vent Rerouting
Signs you need it
The vent goes into a crawlspace, attic, or interior wall cavity rather than terminating outside, or the run exceeds 25 feet with multiple elbows and can’t be effectively cleaned.
What it costs in Waltham
Rerouting a dryer vent in Waltham typically costs $280 to $520 depending on exterior wall type and run length, with the written quote fixed before any work starts.
How we do it
We run rigid metal duct where building code allows, replace flex where it’s kinked or sagging, and terminate the vent through an exterior wall with a proper backdraft damper and bird guard.
Bird Guard Installation
Signs you need it
Birds, squirrels, or bees are entering the exterior vent hood, or you find nesting debris at the dryer connection where the exhaust exits the machine.
What it costs in Waltham
Bird guard installation in Waltham runs $70 to $140 including the part and labor when done with any other dryer vent service.
How we do it
We install a louvered or mesh guard over the exterior termination that fully closes when the dryer isn’t running, keeping wildlife out without restricting airflow.
What Dryer Vent Cleaning Costs in Waltham
| Item | Typical range in Waltham |
|---|---|
| Dryer vent inspection (credited) | $79 – $140 |
| Full lint removal, standard run | $120 – $260 |
| Long/multi-elbow run or triple-decker | $220 – $340 |
| Vent rerouting (rigid metal) | $280 – $520 |
| Bird guard installation | $70 – $140 |
How often should dryer vents be cleaned in Waltham?
Every 12 months for most Waltham homes. The river-valley humidity and long retrofit runs in older triple-deckers mean lint compacts and holds moisture faster than in purpose-built newer construction. If your dryer takes two cycles, don’t wait for the annual mark. Call (806) 606-6902 and we’ll quote it in writing.
Why does my Waltham dryer vent clog so fast?
Long flex runs through old wall cavities collect more lint because the interior surface is ribbed and the run sags. Add river humidity and the lint packs solid instead of blowing through. We can tell you the exact run length and condition from the inspection photo.
Duct Repair & Sealing in Waltham
In Waltham’s triple-deckers and mill conversions, duct repairs usually mean one thing: flex duct that has detached, torn, or collapsed inside a ceiling or wall cavity it was never designed to occupy. The tell is a room that never reaches the same temperature as the rest of the unit, or a utility bill that climbs every year with no change in usage. This is exactly what Duct Repair & Sealing addresses, and we won’t quote a repair range without photographing the damage first.
Duct Sealing
Signs you need it
Rooms at the end of the longest run stay cold in winter, hot in summer, and you can feel air moving around closed registers or hear a whistle at the seams.
What it costs in Waltham
Duct sealing in Waltham averages $85 to $220 per access point, with most homes needing 3 to 5 points sealed; the written quote lists every one before work starts.
How we do it
We locate the leaks with a smoke pencil or pressure test, then apply mastic sealant and foil tape to every accessible seam, joint, and boot-to-register connection.
Flex Duct Repair
Signs you need it
One room gets weak airflow no matter the season, or a visual inspection shows sagging, kinked, pulled-loose, or rodent-chewed flex runs in a crawlspace or attic.
What it costs in Waltham
Flex duct repair or replacement in Waltham runs $150 to $420 per run depending on length, diameter, and how much of the run is accessible from existing panels.
How we do it
We remove the damaged section, install new flex with proper support every four feet, and photograph the finished run before closing any access panel.
Duct Insulation
Signs you need it
Duct surfaces sweat and drip in summer, especially in uninsulated mill-conversion cavities along the Charles River, and you see water staining or mold on the ceiling below.
What it costs in Waltham
Duct insulation in Waltham runs $8 to $15 per linear foot for most residential runs, plus access work if a soffit or ceiling panel must be opened.
How we do it
We wrap the accessible duct with the R-value appropriate to the space, seal the seams, and add a vapor barrier so river-valley humidity can’t condense on the metal.
What Duct Repair & Sealing Costs in Waltham
| Item | Typical range in Waltham |
|---|---|
| Duct sealing (per access point) | $85 – $220 |
| Flex duct repair / replacement | $150 – $420 per run |
| Duct insulation (per linear foot) | $8 – $15 |
| Mastic sealant application | $120 – $280 per room zone |
Can you actually seal ducts I can’t see?
Partially. We seal what’s accessible from existing panels and photograph every point. Where runs are buried and can’t be reached without invasive access, we tell you in writing what was sealed and what wasn’t, with the reasons. Call (806) 606-6902 for a written scope.
Why do Waltham retrofit ducts leak so much?
Because they were installed fast, through spaces not built for ductwork, with long runs and more seams than a purpose-built system. Every seam and joint is a potential leak, and old flex fails at the connection points first. Our photo record shows you each one.
Air Quality & Sanitizing in Waltham
Air quality work in Waltham nearly always starts at the Charles River. Lower-elevation streets close to the water hold more ambient humidity, and that humidity finds its way into ductwork that was retrofitted without proper insulation in the older housing stock. The result is mold and biofilm on ducts, registers, and coils, and musty air that no amount of scented anything fixes. Air Quality & Sanitizing treats the surface where the problem lives, and we document every treatment with before and after photos.
Mold Treatment
Signs you need it
You smell must whenever the system runs, see dark spotting on register covers or interior duct surfaces, or have confirmed mold from a lab test or our visual inspection.
What it costs in Waltham
Surface mold treatment in Waltham runs $350 to $900 for a full accessible residential duct system, depending on how many runs and whether the coil is involved.
How we do it
We apply an EPA-registered antimicrobial to all accessible interior duct surfaces, registers, plenums, and coils, then photograph the full treated area as part of the standard job record.
Odor Removal
Signs you need it
Cooking, pet, smoke, or previous-occupant odors persist in the home and intensify when the HVAC blower cycles on, blowing the smell into every room.
What it costs in Waltham
Odor removal in Waltham typically runs $250 to $600 depending on home size and the number of duct runs; we include the treatment in a written quote before any work.
How we do it
We clean the accessible duct surfaces first, then fog a deodorizing treatment through the duct system and evaporator coil to neutralize the odor source rather than mask it.
UV Light Installation
Signs you need it
Recurring mold or mildew on the evaporator coil, even after routine cleaning, or a household member with a respiratory condition aggravated by airborne biologic growth.
What it costs in Waltham
UV light installation in Waltham runs $450 to $900 including the unit, mounting, and wiring, with the exact price in writing based on your air handler configuration.
How we do it
We mount a UV-C lamp in the supply plenum or at the evaporator coil, oriented so the light hits the coil surface directly, and wire it to run continuously when the blower is on.
What Air Quality & Sanitizing Costs in Waltham
| Item | Typical range in Waltham |
|---|---|
| Mold treatment (full accessible system) | $350 – $900 |
| Odor removal (full system) | $250 – $600 |
| Bacteria sanitizing (duct surfaces and coil) | $300 – $800 |
| UV light installation | $450 – $900 |
Does mold in Waltham ducts always require replacement?
No. Surface growth on metal duct or plastic flex that hasn’t penetrated the material can be treated with an EPA-registered antimicrobial. We’ll show you the photograph and tell you in writing whether treatment or replacement makes sense. Get a written answer at (806) 606-6902.
Why do Waltham mill condos get musty ducts faster?
The brick walls hold no insulating value and the duct runs sit inside the uninsulated cavity. River air condenses on the metal, water beads up, and mold follows. It’s the most common air quality call we handle near the Charles River. The fix starts with insulation and ends with sanitizing.
Brands We Service in Waltham
Our Waltham crews carry Guardsman, Rotobrush, Nikro, and Honeywell equipment, and stock common replacement parts for the system components we clean and repair. Our brands page lists the full roster. Most single-run repairs are completed the same visit, since we keep the most-failed fittings on the truck instead of ordering from a distributor.
Pricing for Air Duct Cleaning in Waltham, MA
| Service | Typical range in Waltham |
|---|---|
| Dryer vent inspection (credited) | $79 – $140 |
| Full lint removal, standard run | $120 – $260 |
| Long/multi-elbow run or triple-decker | $220 – $340 |
| Vent rerouting (rigid metal) | $280 – $520 |
| Bird guard installation | $70 – $140 |
| Duct sealing (per access point) | $85 – $220 |
| Flex duct repair / replacement | $150 – $420 per run |
| Duct insulation (per linear foot) | $8 – $15 |
| Mold treatment (full accessible system) | $350 – $900 |
| Odor removal (full system) | $250 – $600 |
| UV light installation | $450 – $900 |
In Waltham, prices push toward the high end when duct runs are long, buried behind plaster and lath, or need access panels cut into old mill timber or triple-decker framing. Every quote is written and fixed before any work begins, per Haven Standard Clause 1. No call-for-a-quote, no bait price.
Neighborhoods We Serve in Waltham
We work across Waltham regularly, from the South Side triple-deckers to the Warrendale capes to the mill lofts along the Charles.
- Moody Street corridor
- South Side
- Warrendale
- Cedarwood
- Charles River mill conversions
Response for Waltham is typically next-day, with same-week scheduling available for most non-emergency calls. Dispatch is coordinated from our Boston office, and our crews live in the area.
Service Area - Cities Near Waltham
CleanRun serves Waltham and the surrounding metro-west towns, including Belmont, MA, Watertown, MA, Lexington, MA, and Newton, MA. If your home sits a block over the line, call (806) 606-6902 and we’ll confirm coverage in writing before scheduling.
Serving Waltham, MA - Our Local Coverage Area
We’re based in the Waltham 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 About Air Duct Cleaning in Waltham
For cleaning and repair of existing vent and duct runs, no permit is needed. If we are rerouting a vent or adding a new exterior termination, Waltham building code may require a permit. We’ll tell you in writing whether your specific job needs one, and handle the paperwork if it does.
Yes. We clean and repair duct runs in multi-family buildings, but if the duct system is shared between units, we require coordination with the building owner or HOA first. In mill-conversion condos, some runs pass through common walls, and access often requires building management approval. Ask us before we arrive at (806) 606-6902.
Every Waltham job gets a Documented Photo Record showing the inside of every duct run before and after, a written scope of work, and the written 365-Day Done Right Promise. Your price stays the price you approved, and you keep all of it as a permanent record. That’s the H.A.V.E.N. Standard.
Call (806) 606-6902 for a written, fixed-price estimate on any duct, vent, or air quality work in Waltham. No bait pricing, no pressure. Just a number in writing, and photos to prove the work when it’s done.
What happens when you call
- 1A real person answersNo phone trees - talk to a local air duct cleaning pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Waltham Customers Say
"On time, professional, and explained what the readings meant without talking down to me."
- Warren E."The before and after photographs of each run are the reason I used them. You cannot argue with what came out of the return."
- Marguerite O."Flat price agreed up front, no per-vent add-ons at the end. That was the whole reason I did not call the coupon company."
- Suzanne B.