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Commercial Duct Cleaning & IAQ Inspection Across the NYC Metro
Years of dust, construction debris, microbial growth, and shed fiberglass accumulate inside commercial supply, return, and exhaust ductwork — and your tenants breathe whatever the system pushes downstream. Com+ Mechanical performs NADCA-method source-removal cleaning and documented inspection of duct, coils, and air-handling equipment for office, retail, healthcare, and mixed-use buildings, restoring indoor air quality and airflow without shutting your building down.
Indoor Air Quality Problems We Diagnose & Resolve
Dust streaking and black staining around supply diffusers
Contaminant buildup blowing out of dirty supply duct deposits on ceiling tile and grille faces. We source-remove the debris from the trunk and branch runs so the staining stops recurring — surface cleaning the grille alone never fixes it.
Tenant complaints of stale, musty, or 'sick building' odors
Odors usually trace to microbial growth on wet cooling coils, standing water in a clogged condensate pan, or organic debris in return plenums. We inspect those points, clean the source, and treat confirmed growth rather than masking it with deodorizer.
Rising dust, allergy, and respiratory complaints across a floor
Settled particulate in shared return and supply duct re-entrains every time the system cycles, circulating it to every tenant. HEPA-captured source removal plus a filter upgrade cuts the recirculating load the whole floor breathes.
Reduced airflow and longer run times after years of service
A fouled cooling coil and debris-loaded blower wheel restrict airflow and force RTUs and AHUs to run longer for the same setpoint. Coil and blower cleaning frequently recovers static-pressure capacity the system lost.
Post-renovation drywall dust and construction debris in the system
Tenant fit-outs and demolition pull gypsum dust, sawdust, and debris into open return and supply duct. A post-construction cleaning clears the system before that load coats coils and circulates to occupants.
Visible mold, moisture, or fiberglass shedding inside duct
Saturated internal liner, failed vapor barrier, or deteriorating fiberglass duct board sheds particles and harbors growth. We document the condition on camera and clean, treat, or flag sections for liner repair or replacement.
Duct Cleaning Built for Commercial Buildings, Not Houses
In a commercial building, the duct system is a shared lung — the same air loops past every tenant, conference room, and lobby on the floor. When supply trunks fill with settled dust, return plenums pull in carpet fiber and debris, and cooling coils grow biofilm in NYC's humid summers, the result is visible grilles staining, rising particulate complaints, and an HVAC system working harder to push air through restricted passages. Com+ Mechanical cleans and inspects commercial duct systems to the NADCA ACR (Assessment, Cleaning & Restoration) standard across the five boroughs, Nassau, Westchester, northern New Jersey, and Stamford. We put the system under negative pressure with HEPA-filtered collection, mechanically agitate contaminants off interior duct walls, clean the coils and blower section where the real airflow and IAQ losses live, and document the before-and-after with photo and (where specified) particle-count verification. We work around occupancy, freight-elevator and roof access, and after-hours windows so the work happens without disrupting tenants or tripping life-safety systems.
What Our Duct Cleaning & Inspection Service Includes
Why Commercial Duct Cleaning Pays Off
Our Simple Process
From call to comfort in 4 easy steps
Assessment & Camera Inspection
We survey the system, open or add access points, and inspect duct interiors, coils, and the blower section with borescope and camera to document baseline condition and scope the real contamination — not a one-size estimate.
Containment & HEPA Negative Air
We isolate work zones, protect occupied space and finishes, and put the system under continuous negative pressure with HEPA-filtered collection so every dislodged contaminant is captured rather than circulated to tenants.
Source Removal & Coil Cleaning
Crews mechanically agitate and extract debris from interior duct walls per NADCA ACR method, then clean coils, drain pans, blower wheels, grilles, and terminal devices — coordinated around your access and after-hours windows.
Verification & Documentation
We re-inspect on camera, apply antimicrobial treatment only where growth was confirmed, replace filters, and hand over before-and-after photos and an inspection report for your records and tenant communications.
Types of Systems We Install
Supply, Return & Exhaust Ductwork
The trunk and branch runs that distribute and recirculate air to every tenant — where settled dust, debris, and shed liner accumulate and recirculate.
- •NADCA mechanical source removal
- •Borescope interior inspection
- •Access-door installation and sealing
Coils, Drain Pans & Air-Handler Interiors
The cooling coils, condensate pans, and blower sections inside RTUs and AHUs where biofilm, moisture, and debris cause the biggest IAQ and airflow losses.
- •Evaporator/cooling-coil cleaning
- •Drain-pan and blower-wheel cleaning
- •Antimicrobial treatment where warranted
Grilles, Diffusers & Terminal Devices
Registers, diffusers, and accessible VAV/terminal boxes at the point of delivery — the visible surfaces tenants notice when the system is fouled.
- •Register and diffuser cleaning
- •Accessible terminal-box cleaning
- •Filter replacement to building MERV spec
Why Choose Com+ Mechanical for Duct Cleaning & IAQ
NADCA-method source removal
We clean to the NADCA ACR standard with HEPA-filtered negative air and mechanical agitation — true source removal, not a vacuum-the-vent service that leaves the trunk lines and coils untouched.
We clean the coils, not just the duct
Most real IAQ and airflow losses live on the cooling coil, in the drain pan, and on the blower wheel. As a full commercial HVAC contractor, we service those components correctly — many duct-only cleaners can't.
Built around occupied buildings
We contain dust, protect finishes, and schedule around tenants, freight access, and after-hours windows so cleaning doesn't disrupt operations or trip life-safety devices.
Documentation property managers can use
Borescope photos, inspection findings, and verification give you a defensible record of system condition for tenants, ownership, and due-diligence requests across a portfolio.
Transparent Pricing
No fees. No surprises. Just honest service.
Duct & IAQ Assessment
Camera-based inspection and indoor-air-quality evaluation for facility teams scoping a cleaning before committing to a full project.
- Borescope/camera inspection of supply, return, and exhaust runs
- Coil, drain-pan, and blower-section condition check
- Documented findings with photos and a recommended scope
- Itemized cleaning proposal with verification options
Duct Cleaning & Restoration
Full NADCA-method source-removal cleaning of the duct system and air-handling equipment, scoped to your building.
- HEPA negative-air source removal of all accessible runs
- Coil, drain-pan, blower-wheel, grille, and terminal cleaning
- Antimicrobial treatment where growth is confirmed, plus filter replacement
- Post-cleaning verification and photo documentation
IAQ Maintenance Agreement
Scheduled coil cleaning, filter changes, and periodic duct inspection to hold IAQ and airflow across your portfolio.
- Recurring coil and drain-pan cleaning and inspection
- Filter-change program at a building-appropriate MERV rating
- Periodic camera re-inspection with trend documentation
- Priority scheduling across multi-building portfolios
Pricing shown is a structure, not a quote. Final pricing is confirmed in writing after an on-site assessment and camera inspection of system size, access, and contamination level.
Own a Commercial Property?
Business+ plans start at $499/year — includes 2 rtu tune-ups, 10% off all services, and priority scheduling.
Equipment & Brands We Service
Factory-trained technicians for all major HVAC manufacturers
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Don't see your brand? We service all major manufacturers! Call us to confirm.
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Frequently Asked Questions
Get answers to common questions about our services
Do you offer duct cleaning across multiple buildings or a whole portfolio?
Yes. We support property-management companies and owners with multi-site portfolios, giving you one vendor, consistent inspection documentation, and coordinated scheduling so cleaning rolls out the same way across every building and borough.
How is commercial duct cleaning different from a residential service?
Commercial systems are larger, shared across tenants, and carry the IAQ load for entire floors. We clean to the NADCA ACR standard with HEPA-filtered negative air and mechanical source removal — and we also clean the cooling coils, drain pans, and blower sections where most airflow and air-quality losses actually live, which vent-only residential services skip.
Will cleaning disrupt our tenants or trip the fire/life-safety system?
We plan around it. We contain work zones, protect finishes, coordinate any required system or smoke-detector isolation with building staff, and schedule disruptive work for after-hours or low-occupancy windows so daily operations and life-safety coverage are maintained.
How often should a commercial building have its ductwork cleaned?
It depends on occupancy, filtration, and use — a medical or food-service tenant differs from a low-traffic office. Cooling coils and filters are typically serviced on a recurring maintenance interval, while full duct cleaning is driven by inspection findings, recent renovation, or rising IAQ complaints. We recommend a camera inspection to set the right cadence rather than a fixed calendar rule.
Does duct and coil cleaning help with energy efficiency and Local Law 97?
Yes — indirectly but measurably. A fouled cooling coil and debris-loaded blower force RTUs and AHUs to run longer and draw more energy for the same setpoint. Cleaning restores airflow and heat transfer, which trims runtime and energy use — and lower energy consumption supports your building's Local Law 97 emissions targets.
Do you provide 24/7 response if an IAQ or contamination issue is urgent?
Yes. Water intrusion, a contamination event, or an acute tenant air-quality complaint can't wait, so we provide 24/7 commercial response across the NYC metro to assess and contain the issue.
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Tell us the building, the system, and the complaints you're hearing — we'll camera-inspect the duct and coils, document what's really in there, and scope a cleaning that fixes the source. Serving property managers and building owners across the NYC metro.
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