The short answer
Gramercy homeowners and building owners should have chimneys, fireplaces and vents inspected once a year, as the NFPA 211 standard calls for. A Level 2 inspection is the right choice after a fuel switch, a new appliance or a home sale. Boiler flues are best checked before heat season starts on October 1.
Nexora Chimney Services inspects chimneys, fireplaces and flues for homes and buildings in Gramercy from our office at 304 E 20th St. Many chimneys in this part of Manhattan serve brownstones, rowhouses and pre-war apartment buildings that have been renovated, re-fueled or re-piped over many decades. An inspection tells you what condition the flue is actually in, whether it suits the appliance connected to it, and what needs attention before you light a fire or the heat comes on for the season.
What a Chimney Inspection Covers
A standard inspection looks at every part of the system that can be reached without opening walls or the chimney itself. Our certified technicians check the flue from the firebox or appliance connection and, where safe access exists, from the roof.
Older brownstones and rowhouses often have unlined brick flues, or liners that were added in sections over the years. Those details determine what the chimney can safely serve. We note what we find in writing, with photos where they help, so you can see the issue for yourself.
- Firebox, damper and smoke chamber condition on wood-burning fireplaces
- Flue liner condition, including cracks, gaps, missing sections or heavy creosote buildup
- Connections from boilers, furnaces or water heaters into the chimney
- Crown, cap and exterior masonry visible from the roof
- Signs of water entry, animal nests or debris blocking the flue
- Clearances between the chimney and nearby wood framing where visible

Choosing the Right Inspection Level
The NFPA 211 standard calls for chimneys, fireplaces and vents to be inspected once a year. Chimney professionals use three levels. Level 1 applies when nothing about the system has changed. Level 2 applies when the system changes, such as a new appliance or a switch of fuel, or when the home is sold. Level 3 is used when a hidden hazard can only be reached by opening part of the chimney or building.
Level 2 comes up often in older Manhattan buildings. A new boiler, a change of fuel, a renovation that reworked a fireplace, or the sale of a brownstone or co-op unit with a working fireplace all call for it. A Level 2 inspection typically includes a camera scan of the flue interior, which shows liner damage that can't be seen from either end.
Level 3 is less common. It may be needed when smoke shows up in a room or a wall next to the chimney is stained, and the only way to confirm the cause is to open the chimney or the surrounding structure. If we recommend it, we'll explain why first.
Oil-to-Gas Conversions in Gramercy Buildings
Many pre-war apartment buildings and larger rowhouses in the neighborhood were built to burn oil. When a New York City building converts its boiler from oil to gas, the chimney has to be evaluated as part of the work. A new liner is often needed because gas exhaust produces acidic condensate that can corrode a masonry flue that held up fine under oil.
Your building may be planning a conversion, or it may have finished one without anyone confirming the flue was assessed. In either case, an inspection gives the owner, board or contractor a clear picture of the flue's condition and the liner work the new appliance needs, if any.
Time for your annual chimney check?
Timing Your Inspection Around Heat Season
New York City's heat season runs from October 1 through May 31. During that period, building owners must keep apartments heated to the city's minimum temperatures. A boiler flue problem found in January is much harder to fix without interrupting heat for residents.
That makes late spring and summer practical times to inspect boiler chimneys in Gramercy buildings. The same timing works for fireplace owners. An inspection before the first cold snap leaves time to schedule cleaning or repairs before you want to use the fireplace.
Serving Gramercy and Nearby Neighborhoods
Our office is on East 20th Street, so homes in Gramercy's 10010 ZIP code are close by. We also inspect chimneys in Stuyvesant Town, Peter Cooper Village, Midtown South, Flatiron and Union Square.
In these neighborhoods, roof access usually goes through building management, a super or a co-op board. We can coordinate with whoever controls access so the inspection covers the full flue, not just the bottom of it.
More services in Gramercy
- Chimney Sweep in Gramercy
- Chimney Repair in Gramercy
- Air Duct Cleaning in Gramercy
- Chimney Liner Installation in Gramercy

