Lynbrook, NY: the heat pump payback math
Lynbrook is a place where a heat pump genuinely costs more to operate than the alternative. $3,500 is what Lynbrook would pay extra to go electric rather than replace the furnace and AC with the same again, once the $2,000 federal credit is applied. Running costs here land $72 a year HIGHER than the furnace it replaces, so that premium is never recovered. There's no spin on that: Lynbrook's numbers say wait.
The climate behind Lynbrook's payback figure
4105 heating degree days pile up here every year, so Lynbrook has a real but manageable winter; the cooling side runs to 1134 cooling degree days, where summers are hot enough that cooling matters as much as heating. The 99% winter design temperature here — the cold snap equipment must be sized for, not the seasonal average — is 18°F, against a record low of 12°F. That puts the seasonal coefficient of performance at 3.13 for the recommended cold-climate unit. A cold-climate unit is the right call in Lynbrook — below 25°F design temperature, a standard heat pump leans hard on electric-resistance backup, which erases most of the savings. Climate figures trace to the nearest NOAA station, JOHN F KENNEDY INTERNATIONAL, 4.9 miles from Lynbrook.
What it actually costs to run, year to year
Modelled on a typical 2000-square-foot house, the heat pump draws about 3,321 kWh a year to keep it warm, plus cooling, for a combined electric bill near $1,253 a year. The gas furnace it replaces burns roughly 43 Mcf a year at 17.58 per Mcf here, for a running cost near $1,181 a year (electricity here runs 29.22¢/kWh). Looked at as a full purchase rather than an incremental one, payback here is longer than the 15-year equipment life, leaving the 15-year total $4,578 behind.
The other scenario: no gas furnace to begin with
Gas isn't universal in Lynbrook — many houses run on electric heat already. Compared with baseboard or electric-furnace resistance heat, the numbers shift in the heat pump’s favor. Switching saves about $2,214 a year here — a heat pump moving heat rather than generating it needs far less electricity than resistance coils — so the extra $8,000 spent up front comes back in about 3.6 years.
Where Lynbrook ranks in this dataset
Ranked against the other 3206 cities covered, Lynbrook comes in at 1456 for heating severity — 1 would be the coldest place in the dataset — and 1869 by population, where 1 is largest. That's the middle third for winter severity among the cities covered here.
What to do with this number in Lynbrook
About 20,684 people live in Lynbrook, New York, and every number on this page is what a contractor would actually work from when quoting a system here — the point isn't to replace that quote, it's to tell you whether to bother asking for one. Here, there's no cost penalty to waiting until your current furnace or AC actually needs replacing.
Line up a few local HVAC quotes before you decide.
Reading further on this page's numbers
Nothing above is a black box: the methodology guide shows the full arithmetic behind Lynbrook's 3.13 seasonal COP and payback figure. At a 18°F design temperature, Lynbrook sits in cold-climate territory; the guide to that class of unit explains why.