Suffolk Chimney Liner
suffolkchimneyliner.com is the leading resource for chimney liners in Suffolk County. Installed by DME Maintenance, Suffolk Lic. #H-43223. Since 2001.
What We Install
We install stainless steel chimney liners for every fuel and appliance type on Long Island. Not a generalist chimney company — a chimney liner specialist.
- Gas Boiler & Water Heater Chimney Liners
- Oil Boiler Chimney Liners
- Wood-Burning Fireplace Liners
- Wood Stove & Insert Liners
- Pellet Stove Vent Liners
- Prefabricated Class-A Chimney Relining
- Video Camera Chimney Inspection
Authority Topics
Because a chimney liner is a life-safety installation, we've written the definitive Long Island reference on each of the topics that matter:
- Heating System Venting — how atmospheric vs condensing boilers vent, and why the difference matters.
- Fireplace Liners — when your masonry fireplace needs relining and what 316L stainless actually means.
- Wood & Pellet Stove Liners — full-length reline standards for EPA Phase III stoves.
- Oil-to-Gas Conversion — why the 2005 NY code makes a liner mandatory.
- Code Compliance — NFPA 211, 316L stainless, and the NY Fuel Gas Code.
- Materials Guide — 2-ply smoothwall vs single-wall flex vs clay tile.
Transparent Pricing
| Configuration | Installed Price |
|---|---|
| 20 ft, 6" 2-ply smoothwall 316L stainless | $1,750 |
| 25 ft, 6" 2-ply smoothwall 316L stainless | $1,975 |
| 30 ft, 6" 2-ply smoothwall 316L stainless | $2,295 |
| 35 ft, 6" 2-ply smoothwall 316L stainless | $2,625 |
Where We Work
We serve every town and hamlet in Suffolk County — 149 in total.
Frequently Asked Questions
Why do I need a chimney liner?
A chimney liner protects the masonry from corrosive combustion byproducts, contains the flue path in a code-compliant channel, and ensures proper draft. Modern gas and oil appliances produce condensate that eats through unlined mortar. NFPA 211 requires listed liners for most appliance venting.
I'm converting from oil to gas — do I really need a new liner?
Yes. Since 2005, New York fuel gas code requires a properly sized stainless steel liner when converting a chimney from oil to gas service. Gas produces cooler exhaust than oil; without a correctly sized liner, water vapor condenses inside the flue and destroys the masonry — plus you risk carbon monoxide spillage into the home.
I have a high-efficiency (condensing) boiler — do I need a stainless steel liner?
No — and if someone quoted you a stainless liner for a condensing appliance, they are wrong. Condensing units (90%+ AFUE, side-wall PVC visible outside) vent through PVC, CPVC, or polypropylene per UL-1738. Stainless steel is not rated for the acidic condensate these units produce. Ask about your boiler's AFUE rating before agreeing to any liner work.
How long does a stainless steel liner last?
A properly installed 2-ply smoothwall 316L stainless steel liner carries a lifetime manufacturer warranty when installed by an authorized dealer and used with the correct fuel. Real-world lifespan on Long Island installs runs 25 to 40+ years.
What's the difference between smoothwall and flex liner?
2-ply smoothwall has a smooth interior surface that resists creosote buildup, drafts better, and cleans easier. Single-wall corrugated flex is cheaper but fails inspection in many jurisdictions, catches creosote, and is not appropriate for wood or oil. We install 2-ply smoothwall as standard.
Why choose DME Maintenance for my liner installation?
We've been installing stainless steel liners on Long Island since 2001. We hold Nassau H-license #H0101570000 and Suffolk H-license #H-43223. Zero Consumer Affairs complaints on file with either county. We're factory-authorized for the liner systems we install. And chimney work is what we do — not a side job.