New furnace, boiler, or heat pump installation — plus full system replacements when your aging heater has seen its last winter. All Seasons has installed heating systems across Long Island since 1968. Free estimates, financing available, completed in one day.
Most furnaces last 15–20 years with proper maintenance. If yours is approaching that mark — or if you've had multiple repairs in recent winters — the math often tips toward replacement. A new high-efficiency system can cut your heating bills significantly while eliminating the anxiety of mid-winter breakdowns.
Age is the biggest factor. Furnaces over 15 years old are nearing end of life — efficiency drops every year and replacement parts become scarce.
Older furnaces lose efficiency every year. A new 96% AFUE unit can cut heating fuel costs by 30–40% compared to an older 60–70% AFUE system.
Apply the 50% rule — if a repair costs more than 50% of a new system's price, replacement is almost always the smarter investment.
Some rooms too hot, others too cold — or the system runs constantly without reaching temperature. Signs of a failing or incorrectly sized system.
We install and replace all types of residential heating systems — from high-efficiency gas furnaces to heat pumps and boilers. We recommend the right system for your home's layout, fuel source, and budget.
The most common heating system on Long Island. Modern high-efficiency gas furnaces achieve up to 96% AFUE — delivering more heat for every dollar of fuel. We install single-stage, two-stage, and modulating models depending on your home's needs.
A single system that heats in winter and cools in summer. Cold-climate heat pumps work efficiently down to -13°F — an excellent alternative to oil or gas for Long Island homes looking to reduce fuel dependency and heating costs.
Many older Long Island homes heat with boilers through baseboard radiators or radiant floor systems. We install and replace gas and oil boilers, and can convert oil systems to gas where utility infrastructure allows.
For homes without existing ductwork, Daikin ductless mini splits provide zoned heating and cooling with no major construction. Perfect for older Long Island homes, additions, and finished basements.
Full replacement of your existing furnace — we remove the old unit, properly dispose of it, and install a correctly sized high-efficiency replacement. Most jobs are completed in one day with minimal disruption.
Qualifying heating installations may be eligible for manufacturer rebates and 0% financing options. We walk you through every available incentive during your free estimate — no pressure, just the facts.
From your free estimate to the moment we fire it up — here's exactly what to expect when All Seasons installs your new furnace or heating system on Long Island.
We assess your home, existing system, ductwork, and heating load. You get a full written quote with equipment options — no obligation, no pressure.
We help you choose the right system and efficiency level for your budget. We handle all permits and schedule your installation — typically within days.
Our certified technicians remove your old system, install the new unit, complete all gas, electrical, and flue connections, and test thoroughly for safe operation.
We run the system through all cycles, confirm safe CO levels, register your warranty, and walk you through your new thermostat and controls before we leave.
Furnace installation cost on Long Island varies based on system type, efficiency rating, and your home's existing infrastructure. Here are typical ranges — your free estimate will give you the exact price for your home.
Ranges include equipment and installation labor. Financing available on qualifying systems — ask during your free estimate.
We respond within 1 business hour
"Our 22-year-old furnace finally gave out in January. All Seasons came out the next day, gave us a fair estimate, and had a new high-efficiency unit installed within two days. The new system is quieter, heats faster, and our gas bill dropped immediately."
"Got three estimates. All Seasons was the most thorough — they actually measured the house and calculated the right size. The others just quoted based on what was there before. That attention to detail gave me a lot of confidence. Installation was flawless."
"Used All Seasons to replace my boiler after 27 years. They recommended the right system, handled all the permits, and finished in one day. The technicians were professional and left the basement cleaner than they found it."
Serving Nassau and Suffolk Counties. Don't see your town? Call us — we cover all of Long Island.
All Seasons has been installing heating systems on Long Island for 58 years. Free estimates, financing available, most jobs completed in one day.
