How Much Does Furnace or Boiler Replacement Cost on Long Island?
Last updated Reviewed by Waseem Shahzad, Lead Technician
On Long Island, K2 Cooling & Heating's planning range for replacing a gas furnace is $3,500 to $8,500, and for replacing a gas boiler it is $7,500 to $16,000. All-new systems cost more. Your quote depends on the system type, the fuel, venting and any piping or ductwork changes the house needs.
What does it cost?
| Job | Low end | High end | What moves the price |
|---|---|---|---|
| Gas furnace replacement | $3,500 | $8,500 | Furnace size and efficiency, venting, ductwork connections |
| All-new gas furnace system | $8,500 | $12,000 | New ductwork, gas piping, venting |
| Gas boiler replacement | $7,500 | $16,000 | Boiler type, near-boiler piping, venting or chimney liner, number of zones |
| All-new gas boiler system | $11,000 | $25,000 | New piping and radiation, zoning, venting |
These are the planning ranges from our online Cost Estimator. They are estimates only and not binding; your price depends on site conditions, code requirements, electrical or gas upgrades and the equipment you choose. You get a written estimate before any work starts.
What moves the price?
- System type and fuel: furnace or boiler, natural gas or oil.
- Venting: a new chimney liner or a different vent path adds cost.
- Piping and ductwork changes, plus the number of heating zones.
- For oil-to-gas conversions: whether the existing boiler can take a conversion burner, and removing or abandoning the oil tank, which is priced separately.
Frequently Asked Questions
How much does it cost to replace a gas furnace on Long Island?
K2's planning range for a gas furnace replacement is $3,500 to $8,500. The size and efficiency of the new furnace, the venting and how it connects to your existing ductwork set where the price lands. An all-new furnace system with new ductwork runs $8,500 to $12,000.
How much does a new boiler cost on Long Island?
K2's planning range for replacing a gas boiler is $7,500 to $16,000. Boilers cost more than furnaces because of the near-boiler piping, the venting or chimney liner, and the zone controls. An all-new boiler system with new piping and radiation runs $11,000 to $25,000.
What does an oil-to-gas conversion cost?
It depends on the equipment. A conversion burner on a sound cast-iron boiler costs much less than a new boiler, while a worn boiler is usually replaced with a gas unit. Removing or abandoning the oil tank is priced separately, and a buried tank costs more. We quote each part in writing.
Do I need a permit to replace my furnace or boiler?
Many Long Island towns and villages require a permit for new heating equipment and gas work. K2 does not file town permits, so check the requirements with your building department before the installation is scheduled. We install every system to meet local code.
How do I get an exact price for my home?
Call (631) 414-7141 or send the form. A technician looks at the existing equipment, the space, the ductwork or piping and the electrical panel, then gives you a written estimate before any work starts. The ranges on this page are for planning only and are not a quote.
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