Or Call Now: 646-401-3121 - Venting and Exhaust Fans
Oil-Fired Generator Chimney Installation
A dedicated stainless steel chimney for an oil-fired generator, routed up the exterior wall and terminated above the roofline.
Commercial Chimney Draft Correction for NYC and Long Island Buildings
When a boiler stack, kitchen exhaust, or building flue will not draft, we find the true cause, engineer the correction, and verify the result under normal operating conditions. One team from the first pressure test to the certified, code documented fix.
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Certified and Licensed
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Lifetime Warranty
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48 hr Proposal Turnaround
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Emergency Service 24/7
OVERVIEW
Restoring Reliable Venting Across Your Portfolio
Commercial draft problems rarely resolve on their own. Stack effect in tall buildings, competing exhaust systems, undersized or oversized flues, and aging boiler stacks pull venting out of balance, and the result is backventing into occupied spaces, appliance shutdowns, and failed inspections. As a commercial chimney contractor, we correct the underlying cause rather than treating the symptom, using pressure testing under normal operating conditions to confirm exactly where and why the system fails.
Draft correction is a diagnostic discipline before it is a repair. We measure how the stack, flue, and connected appliances behave together, then engineer a scope that brings the venting back into balance, whether that calls for resizing, resealing, rerouting, extending the stack, or adding mechanical draft with a chimney fan. Property managers, building owners, and general contractors get one accountable team from the diagnosis through the documented result.
- 20+ Years in Business
- 1,000+ Projects Completed
- 48 hr Proposal Turnaround
- 24/7 Emergency Service
WHEN YOU NEED IT
Signs of a Commercial Draft Problem
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Smoke or fumes backventing into occupied spaces
Combustion byproducts pushing back into tenant units, corridors, or common areas point to a draft that has reversed and needs correction before it becomes a carbon monoxide and liability issue.
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A boiler or appliance that will not draft
A commercial boiler that struggles to fire, cycles short, or shuts down on safety usually signals a venting fault in the stack or flue that draft correction resolves.
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Restaurant kitchen exhaust that does not pull
When a kitchen hood or exhaust stack fails to move air, grease, heat, and odor stay in the space, and mechanical interference from surrounding systems is often the cause.
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Downdraft from surrounding taller buildings
New or existing high rise neighbors change wind pressure at the roofline and force air back down the flue, a pattern common across dense NYC blocks.
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Soot and staining at the appliance
Visible soot, discoloration, or condensate near a boiler or appliance indicates incomplete venting and combustion gases that are not clearing the system.
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A failed draft or ventilation inspection
A venting failure noted by an inspector or engineer requires documented correction, and we deliver the engineered fix along with the paperwork that closes it out.
OUR PROCESS
From Diagnosis to Certified Correction
01
Site Assessment and Diagnosis
We inspect the stack, flue, appliances, and surrounding exhaust systems, then run a stack effect analysis to identify the true source of the draft problem.
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Smoke and Draft Testing
We pressure test the system under normal operating conditions to measure performance, locate leakage, and confirm the corrective approach with data rather than assumption.
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Engineered Proposal
Within 48 hours we deliver a scoped proposal with engineered drawings where design and permit filing are required, plus lead times and pricing.
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Correction and Installation
We install the corrective components, whether resizing, resealing, rerouting, extending the stack, or adding a chimney fan, with a protocol built for occupied buildings and minimal downtime.
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Verification and Documentation
We retest until the system passes, then issue a certificate of functionality with photographic documentation for your records.
COMPLIANCE
Paperwork That Protects the Owner
CERTIFICATION
Written to Code
Written certification that the corrected system meets applicable NYC Mechanical Code chimney and vent provisions.
FILING
Drawn and Supported
Engineered drawings and permitting support for corrections that require filing and sign off.
EVIDENCE
Tested and Photographed
A detailed draft testing report with photographic documentation and a certificate of functionality for owner and insurer records.
WHY US
Built for Commercial Venting Work
Data Driven Diagnosis
Pressure testing under normal operating conditions and stack effect analysis identify the real cause instead of the obvious symptom.
Occupied Building Protocol
We phase and schedule corrections around tenants and continuous operations to keep boilers and kitchens running with minimal downtime.
Boiler and Stack Expertise
We correct venting on commercial boiler stacks and flues where short cycling and safety shutdowns trace back to a draft fault.
Single Point of Accountability
One team owns the diagnosis, engineering, correction, installation, and warranty registration from quote through sign off.
24/7 Emergency Response
Venting failures and boiler shutdowns get a fast response so heat and safety are restored quickly.
Documentation That Stands Up
Every correction closes with code paperwork, photographic reporting, and a certificate of functionality.
WHO WE SERVE
Commercial Clients Across the Five Boroughs and Long Island
We correct draft problems for property managers, building owners, general contractors, mechanical contractors, and facility engineers, and we subcontract cleanly for GCs and mechanical teams that need a specialist for the venting scope.
- Multi family buildings
- Commercial and office buildings
- Restaurants and kitchens
- Hotels and hospitality
- Industrial buildings
- Hospitals and institutions
- Houses of worship
- Retail and mixed use
Schedule a Free Consultation
Serving Brooklyn, Manhattan, the Bronx, Queens, Staten Island, and Long Island.
OUR WORK
Draft Corrections in the Field
- Chimney Rebuild
Complete Chimney Stack Rebuild and Masonry Restoration
A severely deteriorated rooftop chimney stack was dismantled to a sound base and rebuilt in new red brick, with a new crown and a stainless steel cap.
- Chimney Rebuild
Complete Chimney Rebuild, Before and After
A failing chimney with crumbling mortar, damaged brick and a broken crown, fully dismantled and rebuilt with a new concrete crown, cap and weather-sealed base.
REVIEWS
What Our Clients Say
Mike S.
Chimney Professionals did a terrific job cleaning my two wood burning fireplaces in a Manhattan brownstone. They came within one day. Their equipment is state of the art, and it was all done in less than 30 minutes. Everything kept spotless. The price was right too.
1 Mar 2026
M. J.
Not only did they answer right away, they had Rod at my door first thing Monday morning and sourced a hard to find part same day when others could not. They beat every other quote I got and had our system back up and running in under an hour.
27 Oct 2025
Bruce S.
The chimney in my 115 year old brick rowhouse had a badly deteriorated terra cotta lining. Michael gave me a fair price, was punctual, and while spending more time than he expected, stuck to the original price. Kudos to Michael for getting a tricky job done.
2 Nov 2025
Jim S.
Mike and his team are phenomenal. Very quick to respond and schedule and then more importantly, absolute professionals. Deep cleaned the chimney and made sure they cleaned any residual dust around the area.
13 Nov 2025
Ryan L.
Our building needed three new liners for each apartment. They did a great job with the removal and new installation. Mike was very easy to work with, and very responsive with any follow ups.
10 Aug 2025
Donna L.
Chimney Professionals were prompt, professional and neat. We would recommend them to anyone looking to get their fireplaces cleaned. A pleasure to work with.
3 Dec 2025
Alan H.
We asked them to inspect our roof and chimney before an upcoming home inspection. They explained every detail clearly, helped us understand what needed fixing, and even assisted with budgeting.
10 Dec 2025
Baktiar M.
Same day service, quick and efficient. Used drones to check the chimney and provided a report. Definitely recommend.
25 Feb 2025
Kara T.
They were able to come out next day and fix our gas fireplace issue. They listened to all of our concerns and addressed any questions we had while thoroughly explaining the work that needed to be done. The price was fair and upfront.
15 Nov 2024
Brandon G.
Mike set up an appointment for the next day to clean our dryer vent. He maintained good communication the whole time. The technician who arrived was professional and did a thorough job. The price was reasonable too.
23 Aug 2025
FAQ
Commercial Draft Correction Questions
The common causes are stack effect in tall buildings, competing exhaust systems such as HVAC, kitchen hoods, and dryer vents, undersized or oversized flues, and aging boiler stacks. We test to confirm which factors are at work before proposing a correction.
We run a stack effect analysis and pressure test the system under normal operating conditions, which measures actual performance and locates leakage rather than relying on assumptions.
Yes. We phase and schedule the correction around tenants and continuous operation so boilers, kitchens, and common areas stay usable with minimal downtime.
Yes. For corrections that require design and filing we work with a registered design professional, and every project closes with written certification, a report, and photographic documentation.
When mechanical draft is the correct engineered solution we handle chimney fan installation and repair as part of the correction.
Yes. We provide 24/7 emergency service for boiler shutdowns and venting failures to restore heat and safety quickly.
Yes. We work as the venting specialist on projects led by GCs and mechanical contractors, delivering diagnosis, drawings, correction, and documentation to spec.
Solve the Draft Problem at the Source
Get a diagnosis, an engineered plan, and a corrected venting system from one accountable team. Proposals in 48 hours, emergency service around the clock.
MANUFACTURING
We Make the Parts That Fix the Draft
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Stainless Steel Pipes
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Chimney Liners
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Custom Caps
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Chase Covers
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Tees, Wyes, and Elbows
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Adapters and Reducers
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Flue Pipes
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Custom Fabrication
Diagnosis and hardware under one team
Most contractors diagnose a draft problem and then wait on a distributor for the parts that solve it. Because we manufacture our own UL Listed stainless steel components, we can produce the exact liner, extension, reroute, damper, or custom cap a correction needs, sized to the stack and the building. That keeps lead times short and puts the design and the hardware under one accountable team.
What that means for your project
- Custom made liners, extensions, reroutes, and caps engineered to the specific draft correction
- Heavy duty, commercial grade stainless steel built for continuous operation and high combustion volumes
- Chimney fan installation and repair where mechanical draft is the right engineered solution
- Lifetime warranty on the UL Listed components we make and install as part of the correction
