Furnace Installation in Lindenhurst, NY
A new furnace here will run from October through May every year. Tell us about the house, and a licensed contractor who covers Suffolk County will get in touch.
Tell us about the job
It takes about a minute.
Lindenhurst asks a lot of a furnace
Homes here need heat from October through May, 8 months a year. Winter nights average 26°F from December through February, and the furnace has to hold a house warm through all of it. 44% of homes here heat with fuel oil, so a lot of what's installed already runs that way.
The area has also logged 82 winter storms and 434 damaging wind events over the past ten years, and storms like that can knock out power. Across New York, 11% of households lost power for at least 24 hours in 2024. Any gas furnace built since November 2015 has to hit a federal minimum of 80.0 percent AFUE, so that floor is already built into what gets installed.
- 8 months
- October through May, your furnace is on duty
- 26°F
- the average winter night it heats against
- 80% AFUE
- the federal minimum any new unit must meet
NOAA nClimDiv, 1991–2020 normals
- What size furnace does my house need?
- A contractor has to work this out with a load calculation, not a chart based on square footage. That calculation looks at how much insulation your house has, how many windows it has and where they face, your ceiling height, and how much air leaks in and out. A furnace that is too big will short cycle and wear out faster. One that is too small will run constantly through a Lindenhurst winter and still not keep up when the temperature drops toward 26 degrees. There is no shortcut that replaces having someone measure your house.
- How do I know it's time to replace my furnace?
- The clearest sign is your furnace struggling to keep the house warm on the coldest nights, since that means it can no longer meet the load it was sized for. Rising repair costs are another sign, especially if you are calling for service more than once a season. Watch for yellow burner flames instead of blue, soot near the unit, or a furnace that turns on and off more often than it used to. Homes here need heat from October through May, so a furnace that is failing has eight months a year to make itself known, and most homeowners feel it well before it quits for good.
- Is a high-efficiency furnace worth it?
- It depends on how long you plan to run it, since a high-efficiency furnace costs more up front but burns less fuel to make the same heat. In a place where the heating season runs eight months and winter nights average 26°F, that furnace is working hard for most of the year, which gives it more chances to make up the difference. Any non-weatherized gas furnace sold new today has to hit at least 80 percent AFUE, so the real comparison is between that minimum and the higher-efficiency models above it. A contractor can walk through the specific models and what each one would mean for your house.