Boiler Contractor in Nassau County, NY
Cast-Iron, Condensing & Steam Boiler Experts
Local boiler contractor serving Nassau County homeowners with expert boiler repair, replacement, and installation. Hydronic, steam, and condensing systems — licensed, insured, and NATE-certified.
Boilers are the backbone of heating in Nassau County's older housing stock — particularly on the North Shore and in pre-war South Shore neighborhoods where hydronic baseboard, cast-iron radiators, and steam systems are still doing their job decades after installation. Our team services and installs every boiler configuration common in Nassau: cast-iron sectional boilers, high-efficiency condensing wall-hung units, combi boilers, and one- and two-pipe steam systems.
Why Nassau County Homeowners Choose Us
Steam & Hydronic Expertise
We service every boiler type common in Nassau — cast-iron, condensing, steam one-pipe and two-pipe.
Near-Boiler Piping Done Right
Every install follows manufacturer spec for near-boiler piping — the #1 cause of premature failure done wrong elsewhere.
Full Permit & Inspection
Mechanical permit filed under our license and inspection coordinated for you.
Boiler Services We Offer in Nassau County
Full-scope boiler contractor services for Nassau County homeowners.
Boiler Repair
Leaks, low pressure, no-hot-water, short-cycling, aquastat and circulator diagnostics.
Learn more about Boiler RepairBoiler Installation
Condensing, cast-iron, steam, and combi boiler installations with proper near-boiler piping.
Learn more about Boiler InstallationSteam Boiler Service
One-pipe and two-pipe steam boiler skimming, main venting, and pressuretrol calibration.
Learn more about Steam Boiler ServiceBoiler Replacement
Same-day-quote replacements with financing available for approved credit.
Learn more about Boiler ReplacementCombi Boiler Installation
Navien and Triangle Tube combi units that eliminate a separate water heater tank.
Learn more about Combi Boiler InstallationEmergency Boiler Service
24/7 no-heat dispatch across Nassau — priority routing during cold snaps.
Learn more about Emergency Boiler ServiceBoiler in Nassau County — What We See in the Field
Boiler configurations in Nassau County vary dramatically by neighborhood age. North Shore villages like Manhasset, Roslyn, Sands Point, and Old Westbury contain 1920s and 1930s homes originally heated with coal-converted-to-oil cast-iron boilers feeding standing radiators — many of these systems are still running, though efficiency is often below 65% and replacement with a modern modulating condensing boiler can cut fuel bills by 30-40%. Central Nassau's post-war housing more commonly uses baseboard hydronic loops. South Shore pre-war neighborhoods — Rockville Centre, Lynbrook, Baldwin — often have one-pipe or two-pipe steam systems where boiler replacement requires careful sizing (steam boilers are sized to EDR of connected radiation, not heat loss) and proper skimming of the new unit. We install Triangle Tube Prestige and Weil-McLain WGO/WM97+ condensing boilers, Peerless and Burnham cast-iron for steam retrofits where condensing isn't viable, and Navien combis where domestic hot water demand justifies eliminating a separate water heater. Every replacement includes near-boiler piping to manufacturer spec — the #1 cause of premature failure in Nassau boiler installs is bad near-boiler piping, not the boiler itself.
Upfront Pricing in Nassau County
Transparent ranges — no surprise fees. Final quote after in-home visit.
| Service | Price Range | Notes |
|---|---|---|
| Diagnostic Visit | $199 | Waived with completed repair |
| Boiler Repair (typical) | $200–$1,200 | |
| Cast-Iron Boiler Install | $7,500–$11,500 | |
| Condensing Boiler Install | $9,500–$14,500 | Financing available |
| Combi Boiler Install | $10,500–$16,000 | |
| Annual Tune-Up | $249 | Includes combustion analysis |
Boiler Contractor Services Throughout Nassau County
Professional service available in your area
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Frequently Asked Questions
Do you service steam boilers in Nassau County?
Yes — steam is common in Nassau's pre-war housing, and it requires specific expertise (skimming, main venting, pressuretrol setup) that many contractors have lost. Our lead installers have decades of steam experience.
Should I replace my cast-iron boiler with a condensing unit?
Usually yes, if your system is baseboard or radiant that can run at low return temps. Condensing boilers only hit their rated efficiency when return water is below 130°F — with old cast-iron radiators sized for 180°F loops, you may not get full efficiency without oversized radiation. We'll assess your system honestly before recommending.
Do I need a permit to replace a boiler in Nassau County?
Yes — every Nassau County town requires a mechanical permit and final inspection for boiler replacement. We file under our license and handle inspection scheduling.
What boiler brands do you install?
For condensing: Triangle Tube Prestige and Weil-McLain WM97+. For cast-iron: Peerless and Burnham. For combi: Navien NCB series. Steam replacements are typically Peerless or Burnham sized to your EDR.
Can you handle oil-to-gas boiler conversion?
Yes — full scope including permit, National Grid coordination, tank abandonment or removal, gas line, boiler install, and inspection sign-off. Common on Nassau's South Shore where many older homes still run oil.
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Same-day appointments available. Upfront pricing, no pressure, and every install backed by our labor warranty.