Expert boiler installation for gas, oil, steam, and hot water systems in Nassau County.
Gas, oil, steam & hot water boilers from $4,500. Free estimates, financing available, and all permits handled.
Whether you're replacing an aging boiler or installing a new heating system, our certified technicians deliver expert boiler installation throughout Nassau County, NY. We install gas, oil, steam, and hot water boilers from top brands including Weil-McLain, Burnham, Navien, and Buderus. Every installation includes proper sizing, permit handling, and full manufacturer warranty registration.
Nassau County homes have a long history with boiler heating, from the original steam radiator systems in Garden City's 1920s Tudors to the hot water baseboard systems in Levittown's post-war Cape Cods. Choosing the right replacement boiler requires understanding your existing distribution system—radiators, baseboard, or radiant floor—and matching it with the proper boiler type and capacity. Our installation team has completed hundreds of boiler projects throughout Nassau County, giving us unmatched local expertise in sizing, piping, and venting for every type of home.
The right boiler depends on your existing distribution system, fuel availability, and efficiency goals
Cast iron radiators
80–85% AFUE
Advantages
Considerations
Price Range: $6,000–$12,000
Homes with existing steam radiators (Garden City Tudors, pre-war colonials)
Baseboard / radiant floor
85–95%+ AFUE
Advantages
Considerations
Price Range: $4,500–$10,000
Most Nassau County homes — Levittown Cape Cods, split-levels, ranches
Baseboard / radiant / fan coil
95–98% AFUE
Advantages
Considerations
Price Range: $7,000–$12,000+
Energy-conscious homeowners looking for maximum savings & rebates
Choose the best fuel for your Nassau County boiler installation
Most of Nassau County
Efficiency: Up to 98% AFUE
Annual Cost: $800–$1,400/yr
Most common and cost-effective. Available on most Nassau County streets.
Areas without gas lines
Efficiency: Up to 87% AFUE
Annual Cost: $1,800–$3,000/yr
Higher fuel cost. Consider oil-to-gas conversion for long-term savings.
Rural areas, no gas/oil
Efficiency: Up to 96% AFUE
Annual Cost: $1,200–$2,200/yr
Good alternative where natural gas isn't available.
Proper sizing is critical — an oversized boiler wastes fuel, an undersized one can't keep up
| Home Size | BTU Output | Typical Home Type |
|---|---|---|
| 800–1,200 sq ft | 40,000–60,000 BTU | Small Cape Cod / Ranch |
| 1,200–1,800 sq ft | 60,000–90,000 BTU | Standard Colonial / Split-Level |
| 1,800–2,500 sq ft | 90,000–120,000 BTU | Large Colonial / Expanded Cape |
| 2,500–3,500+ sq ft | 120,000–175,000 BTU | Large Custom / Multi-Zone |
These are estimates. We perform a Manual J load calculation on every installation to ensure proper sizing for your specific home.
Up to $2,000
Federal credit for qualifying high-efficiency condensing boilers
Up to $1,000
Utility rebates for ENERGY STAR® certified boilers in Nassau County
Factory-trained technicians for all major HVAC manufacturers









Don't see your brand? We service all major manufacturers! Call us to confirm.
We assess your home's heating needs and existing system
We recommend the best boiler type, size, and brand
Our certified team installs your new boiler to code
We test, calibrate, and ensure safe operation
"Replaced our 1950s steam boiler with a modern gas unit. They knew exactly how to work with Levitt home piping. Outstanding job!"
"Installed a high-efficiency Weil-McLain boiler in our Tudor. Respectful of our historic home and the heat is incredible."
"Oil-to-gas conversion done in 2 days. Clean work, handled all permits, and our heating bills dropped 40%."
Expert boiler installation in 30+ communities
5-min from our office
High-efficiency systems
Same-day service
Local HVAC experts
Same-day appointments
All brands serviced
Premium service
Fast local service
Fast local service
Quick response zone
All systems serviced
Residential specialists
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Local experts
Historic home specialists
Post-war home experts
Affordable service
Reliable local service
All brands serviced
Same-day appointments
Fast response
Local HVAC service
Premium HVAC service
Premium service
Expert technicians
Fast local service
Residential service
Coastal HVAC service
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Free in-home estimates · Gas, oil, steam & hot water · 10-year warranty