Fast, Reliable HVAC Cleaning Across Exeter
Professional HVAC cleaning in Exeter, NH typically runs $280-$650 for a full system service, and most jobs are completed in a single visit. We answer calls from Exeter homeowners around the clock, with same-day scheduling when the calendar allows.
We’ve been driving to Exeter since 1984, long before the bypass smoothed out Route 101. Our technicians know the difference between a quick turnaround on Portsmouth Avenue and navigating the tight one-way streets around the historic downtown core. Exeter’s not a town you learn from a map. You learn it by showing up at Federal-era homes where the basement headroom barely clears six feet, where the ductwork was threaded through original timber framing sometime in the 1970s, and where the stone foundation has been wicking moisture from the Squamscott River for two centuries. That’s the work we do. If you’re in Exeter and your system needs attention, call us at (844) 685-6342. A live person answers, 24 hours a day.
Why Bellows Air Duct & Vent Co. Is Exeter’s Preferred HVAC Cleaning Company
Exeter homeowners don’t call us for flash. They call because their neighbor on Lincoln Street did, or because their contractor mentioned our name after seeing us work a job near the Phillips Exeter Academy grounds. After 42 years, our reputation in the Seacoast region is built on showing up when we say and standing behind the work. Our HVAC Cleaning team doesn’t leave until the camera inspection confirms the job is done.
We don’t publish star ratings or review counts. We publish our phone number, and we answer it. Calls to our office are picked up by a live person, never a voicemail tree, never an app. That matters in Exeter, where many of our customers have owned the same home for twenty-plus years and remember when a handshake meant something.
Response time to Exeter is typically same-day or next-morning, depending on when you call and what’s already scheduled. We don’t overbook. If we say we’ll be there, we’ll be there.
Ray Castillo, who leads this company, set the standard early: no bait coupons, no price changes at the door, no paperwork required if something needs fixing. The 90-Day Done Right Promise is stamped on every job. If it’s not right, we make it right. No arguing.
Our HVAC Cleaning Services in Exeter
Evaporator Coil Cleaning
The evaporator coil is where your system pulls humidity from the air, and in Exeter, that humidity runs higher than the ZIP code 03833 would suggest. The Squamscott River’s tidal reach keeps ambient moisture elevated through summer months, and that moisture condenses on coils that may already be coated with dust and biofilm. We clean coils with pressurized foaming agents and low-pressure rinse, then verify with camera inspection. Skipping this step in a humid Exeter basement means recontamination within weeks. We’ve seen it.
Coil Treatment
After cleaning, we apply a coil treatment that inhibits mold and bacterial regrowth. This is particularly important in Exeter’s stone-foundation homes, where the basement air feeding your return ducts carries a persistent microbial load from damp masonry. The treatment we use is safe for occupied homes and leaves no residual odor. It’s not a coating that traps debris. It’s a surface treatment that buys you time between services, especially valuable in riverfront properties near Water Street where foundation moisture is a constant.
Heat Exchanger Cleaning
Exeter’s heating season runs long and hard. A heat exchanger caked with soot or scale can’t transfer efficiently, which means higher fuel bills and uneven warmth in those tall-ceilinged rooms common to colonial and Federal-era construction. We inspect heat exchangers with borescope cameras, clean with brushes sized to the unit, and check for cracks or corrosion that could vent combustion gases into your living space. This is safety-critical work. We don’t rush it.
Blower Cleaning
The blower motor and wheel move every cubic foot of air your home breathes. In Exeter’s older homes with retrofit ductwork, blowers often run harder than designed because of restricted airflow through irregular rectangular ducts. That extra load cakes the blower wheel with debris. We remove and clean the assembly, balance the wheel, and verify amp draw against manufacturer spec. A clean blower runs cooler, quieter, and draws less current.
Condenser Cleaning
Outdoor condensers in Exeter take a beating from road salt on Portsmouth Avenue and Route 108, plus cottonwood fluff in late spring and the fine silt that blows off the Squamscott mudflats at low tide. We fin-comb damaged coils, clean with foaming degreaser, and check refrigerant pressures. A dirty condenser in July humidity is a system that can’t catch up.
Air Handler Cleaning
The air handler cabinet houses your blower, coil, and often your filter rack. In Exeter’s cramped basement installations, air handlers are sometimes squeezed into corners where no technician has fully cleaned in years. We disassemble access panels, clean all interior surfaces, and seal everything properly on reassembly. Failing to seal access panels in tight crawlspaces lets tidal groundwater vapor re-enter the airstream. We’ve corrected that exact problem in homes near the riverfront.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Exeter
We carry professional-grade equipment from Nikro, Honeywell, and Aprilaire, the same brands serious HVAC contractors specify for commercial and institutional work. For Exeter customers, this means we don’t order parts from a warehouse three states away. We stock common consumables and can source manufacturer-specific components for same-day or next-day turnaround. Our Rotobrush air whip systems and Abatement Technologies HEPA vacuums are maintained to factory spec, not run until they fail. When you call about a Honeywell electronic air cleaner or an Aprilaire humidifier mounted on a retrofit plenum in a Water Street colonial, we know the unit. We’ve likely serviced its twin before.
Common HVAC Cleaning Problems We See in Exeter Homes
- Mold-laden ducts from tidal humidity. The Squamscott River’s influence raises basement humidity beyond what inland NH towns experience, accelerating mold colonization inside ductwork routed through damp stone foundations. We find this even in homes with modern mechanical equipment, because the foundation itself is the moisture source.
- Debris trapped in irregular retrofit ductwork. Exeter’s pre-WWII housing stock was never designed for forced air. Ducts threaded through original framing have sharp turns, sagging sections, and corners that standard single-speed vacuums can’t clean. Our variable-speed agitation tools and camera verification catch what others miss.
- Biofilm recontamination after incomplete coil cleaning. In humid Exeter basements, a coil that’s only surface-cleaned regrows slime within weeks. We clean deep into the fin pack and follow with treatment, or the ducts downstream simply re-foul.
- Unsealed access panels in crawlspace installations. Tight crawlspaces with dirt or stone floors are common in Exeter’s older neighborhoods. A panel left loose or gasketed poorly pulls groundwater vapor directly into the supply air. We check every seal before we leave.
Pricing for HVAC Cleaning in Exeter, NH
Here’s what Exeter homeowners can expect:
| Service | Typical Range in Exeter |
|---|---|
| Blower cleaning only | $180-$280 |
| Evaporator coil cleaning | $220-$340 |
| Condenser cleaning | $160-$250 |
| Full air handler cleaning (blower + coil + cabinet) | $380-$520 |
| Heat exchanger cleaning with inspection | $240-$360 |
| Complete HVAC system cleaning (all components) | $480-$650 |
| Coil treatment application | $85-$140 (when added to cleaning) |
What moves the number: accessibility of your mechanical room, condition of the system, whether duct cleaning is bundled, and if we find conditions requiring additional attention. We disclose the full price before lifting a single tool. The number on the phone is the number on the invoice. No bait coupons, no surprises.
Standing offers for Exeter customers: $50 off any repair over $250, free second opinion on any written estimate, $89 seasonal tune-up, and a permanent 5% senior and veteran discount. Call (844) 685-6342 for a free estimate.
We Also Serve Cities Near Exeter
Our service radius covers the full Seacoast region. We regularly work in Exeter and the surrounding towns: Kingston to the northwest, Seabrook to the southeast along the coast, Amesbury just across the Massachusetts line, and Merrimac to the southwest. Same standards, same live-answer phone, same 90-Day Done Right Promise.
Serving Exeter, NH - Our Local Coverage Area
We’re based in the Exeter 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 Exeter
Yes. The tidal reach of the Squamscott River elevates ambient humidity in Exeter beyond what inland New Hampshire towns at similar latitude experience. That moisture wicks through stone foundations and infiltrates basement air handlers, accelerating mold and biofilm growth inside ductwork. We’ve documented this pattern repeatedly in homes near Water Street and the downtown riverfront. Call (844) 685-6342 if you’re noticing musty odors from your vents.
Pre-WWII homes in Exeter were retrofitted with forced-air ductwork decades after original construction, resulting in irregular rectangular ducts routed through tight original framing, uninsulated attic chases, and moisture-prone basements. Standard round-duct cleaning tools often can’t navigate these runs. We use Rotobrush air whips and variable-speed agitation sized to rectangular profiles, with camera verification at every turn. For a free assessment of your system, call (844) 685-6342.
Yes. Our coil treatment is formulated for occupied residential spaces and leaves no residual vapor or odor. It’s particularly appropriate for Exeter’s stone-foundation homes, where basement air quality is already compromised by masonry moisture. The treatment inhibits regrowth without creating a sticky surface that traps new debris. Ask about adding coil treatment when you call (844) 685-6342 for your estimate.
We deploy Abatement Technologies HEPA vacuums with certified 99.97% efficiency at 0.3 microns, paired with Nikro and Rotobrush agitation tools. This matters in Exeter’s humid environment, where disturbed mold spores and dust-mite allergens are a genuine respiratory concern. We don’t exhaust into your living space. We capture at source. Call (844) 685-6342 to schedule.
Federal-style homes on Water Street typically need full HVAC cleaning every 18 to 24 months, with coil inspection annually. The combination of tidal humidity, stone foundation moisture, and retrofit ductwork creates faster debris accumulation than in newer construction. If you smell mildew when the system first kicks on, you’re already overdue. Call (844) 685-6342 for a free inspection and honest timeline.
At a Federal-style home near Water Street, our crew found the interior of the ductwork coated in a biofilm with a distinct mildewy odor, traced to moisture wicking through the stone foundation walls. We deployed a Rotobrush air whip to dislodge debris from irregular rectangular ducts routed through the original framing, followed by an Abatement Technologies HEPA vacuum to capture allergens before they infiltrated the living space.
Exeter sits at the head of tide on the Squamscott River, giving the town a persistently elevated humidity profile unusual for an inland NH community. This tidal-riverfront moisture, combined with Exeter’s high concentration of 18th- and 19th-century homes that were retrofitted with forced-air ductwork decades after original construction, creates a recurring pattern of mold-laden ducts routed through damp stone-foundation basements and unvented crawlspaces - a combination that neighboring towns without tidal influence don’t face to the same degree. Our equipment and techniques are built for this exact environment. Standard cleaners overlook it.
Ready to schedule? Call (844) 685-6342 for a free estimate. A live person will answer, and we’ll give you one honest price before any work begins.
Written by Ray Castillo, Owner at Bellows Air Duct & Vent Co., serving Exeter and the Seacoast region since 1984.