What You Need to Know Before Buying a New Furnace
If your old furnace is losing efficiency and the repairs are getting more frequent and more expensive, it is probably time to replace it. A new furnace is a major investment, so it pays to understand your options before you buy. Here is what every Long Island homeowner should know.
Signs It Is Time to Replace Your Furnace
- Age. Most furnaces last 15 to 20 years. Past that point, a replacement is usually more economical than ongoing repairs.
- Rising heating bills. A furnace that loses efficiency burns more fuel to produce the same heat.
- Frequent or costly repairs. If a single repair costs a large share of a new system, replacement makes more sense.
- Uneven heat or constant cycling. Some rooms never get warm, or the unit turns on and off too often.
- Soot, odors, or visible corrosion around the unit.
Size and Efficiency Matter More Than Brand
A furnace is not something you simply order online and have installed. The right size depends on far more than your square footage. Room layout, insulation quality, windows and doors, and your household’s habits all affect how much heat you actually need. An oversized furnace wastes money and short-cycles, while an undersized one runs constantly and wears out faster. The best way to get it right is to have a licensed technician perform a Manual J load calculation, which accounts for all of those factors.
Efficiency is measured by AFUE (Annual Fuel Utilization Efficiency), the percentage of fuel converted into usable heat. Modern high-efficiency furnaces reach 90% AFUE or more. New oil furnaces are highly efficient and rival gas and propane units, while oil heat delivers more heat per gallon and equipment that often lasts longer.
Should You Consider a Heat Pump Instead?
A heat pump can both heat and cool your home, but the upfront cost is higher, and standard models lose efficiency on the coldest Long Island days, so many homes still need a furnace as backup. For many oil-heat households, a high-efficiency oil furnace remains the most reliable and cost-effective choice. Our team can walk you through the trade-offs for your specific home.
What a New Furnace Costs
The total cost of a new furnace depends on the size and efficiency of the unit, the complexity of the installation, and any added features like a programmable or smart thermostat. Rather than guess from an online price, the smart move is to get a few quotes from licensed, insured contractors. Domino Fuel provides free, no-obligation estimates, and we offer flexible financing so you can spread the cost into low monthly payments instead of paying all at once.
Choose a Licensed, Local Installer
Always have your furnace installed by a licensed and insured contractor. Proper installation protects your manufacturer warranty, ensures the system runs at its rated efficiency, and keeps your family safe. Skipping that step to save a little upfront usually costs far more later.
Furnace or Boiler: Know What You Have
Before shopping, identify your system. A furnace heats air and distributes it through ducts and vents, while a boiler heats water for radiators or baseboard. The buying considerations are similar, but the equipment and installation differ, so be clear about which one you are replacing when you request quotes. If you have a boiler, see our guide to high-efficiency oil boilers.
Questions to Ask Before You Buy
- Did you perform a Manual J load calculation to size the unit for my home?
- What is the AFUE efficiency rating, and what will it save me versus my current system?
- Are you licensed and insured, and is installation included in the quote?
- What warranty comes with the equipment and the labor?
- Are financing or manufacturer rebates available?
Frequently Asked Questions
How long does a new furnace last?
With proper maintenance, a quality oil furnace can last 20 years or more while staying highly efficient.
Is it worth repairing an old furnace instead?
If your system is near the end of its lifespan and a repair costs a large share of a replacement, putting that money toward a new, efficient unit usually makes more sense.
Thinking about a new furnace? Call Domino Fuel at 631-779-3196 or request a free quote. We have helped Long Island families heat their homes since 1981.