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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 Draft Pressure Test for Appliance and Boiler Commissioning
A manometer reading of the actual draft in the flue, compared against the specification your appliance requires, documented as a number you can sign off on. Certified inspectors, precise measurement, and a written record for New York City and Long Island.
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OVERVIEW
A Verified Draft Reading for Commissioning and Sign Off
When you are commissioning a boiler, furnace, or water heater, the appliance only performs to its rated specification if the flue delivers the correct draft. A chimney draft pressure test gives you that number. Our certified inspectors place a manometer in the flue, read the actual draft under firing conditions, and compare it against the required specification.
This service is a numeric measurement, not a general assessment. We tell you exactly what the flue is pulling in inches of water column or Pascals, and whether that value falls inside the range the appliance calls for. Mechanics, installers, and building engineers use the reading to confirm a job is complete or to document that a flue meets code and equipment requirements.
THE MEASUREMENT
What the Test Records
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Operating draft at the appliance
We take a manometer reading at the breech or draft hood while the appliance is firing, capturing the pull the equipment actually sees during normal operation.
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Static draft in the flue
We record the baseline draft before firing, so the operating value can be read against a known starting point.
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Reading at the stack
We measure the draft higher in the flue to see how the pull holds along the full run to the outside.
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Comparison against specification
We check each reading against the range your appliance and flue require, stated in inches of water column or Pascals, and note whether it passes.
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Valid test conditions
We confirm combustion air supply and firing status before recording, so the number reflects real operation rather than a false reading.
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The documented value
We log every reading with the conditions it was taken under, giving you a defensible record for commissioning or code files.
OUR PROCESS
How We Run the Measurement
01
Setup and Requirement Review
We confirm the appliance type, the flue serving it, and the draft specification the equipment requires, then prepare test ports for the manometer.
02
Baseline Reading
We take the static draft in the flue before the appliance fires to establish a reference value.
03
Operating Measurement
We fire the appliance, let it reach normal operation, and read the draft at the breech and stack with the manometer.
04
Comparison to Spec
We place each reading against the required range and record whether the flue is within, below, or above specification.
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Documented Result
We write up the readings, the conditions, and the pass or fail conclusion, and hand you a record you can act on or file.
COMPLIANCE
A Reading You Can Defend on Paper
MEASURED
Manometer Reading
The actual draft value at the appliance and stack, captured under firing conditions.
COMPARED
Against Specification
Each reading checked against the required range for the appliance and flue.
DOCUMENTED
Written Record
A signed report stating the values, the conditions, and the pass or fail result.
WHY US
Why Trades and Engineers Call Us for the Number
Certified Inspectors
Trained technicians who measure and read draft correctly.
Instrument Accuracy
We use a calibrated manometer so the value you record is reliable.
Spec Aware
We test against the range your appliance and code actually require.
Fast Scheduling
Same day appointments across New York City and Long Island.
Clean Documentation
Written readings you can attach to a commissioning or code file.
Licensed and Insured
Fully licensed and fully insured for your protection.
WHO WE SERVE
Who Relies on a Verified Draft Reading
This test serves the trades and the people responsible for equipment that has to vent correctly. Mechanics and HVAC installers use it to close out a new appliance, boiler, or water heater installation with a documented number. Building engineers and property managers use it to prove a flue meets its required draft during inspections, code reviews, or a property sale. Building owners rely on it whenever a venting value has to be confirmed and put on record rather than assumed.
- Single family homes
- Townhouses and condos
- Brownstones
- Historic homes
- Multi family buildings
- Commercial and office buildings
- Restaurants and kitchens
- Hotels and hospitality
Schedule an Inspection
Serving Brooklyn, Manhattan, the Bronx, Queens, Staten Island, and Long Island.
OUR WORK
Recent Draft Pressure Tests
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Custom Fireplace Construction with Class A Chimney and Offset Flue
A new masonry fireplace built to the project plans, with a custom firebrick firebox, smoke chamber and an offset connection into a Class A insulated chimney.
- Fireplace and Firebox
Brownstone Fireplace Reconstruction and Restoration
A decommissioned fireplace in a historic brownstone brought back to life with a new firebrick firebox, rebuilt masonry and a reinstalled stainless steel liner.
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
Draft Pressure Test Questions
It measures the actual draft inside the flue with a manometer, stated in inches of water column or Pascals, and compares that value against the specification your appliance requires.
A general inspection assesses overall condition. This service produces one thing: a verified draft number under firing conditions, suitable for commissioning or code documentation.
Common times are during appliance or boiler commissioning, after a flue change, before a code review, and whenever a required draft value has to be confirmed on paper.
Yes. We take a baseline static reading first, then read the operating draft while the appliance is firing, since the operating value is what the equipment actually depends on.
Most tests take about 45 to 90 minutes, depending on the appliance, the flue run, and access to test ports.
A written record with the measured values, the conditions they were taken under, and a clear pass or fail against the required range.
Cost depends on the appliance, the number of readings needed, and access. We provide a free estimate before any work, so you know the price up front.
We document the value as it stands, and our draft correction service brings the flue back into range if a correction is needed.
Get a Verified Draft Number You Can Sign Off On
Book a chimney draft pressure test with our certified inspectors and get a precise, documented flue draft measurement for commissioning or code.