Kearny, NJ: the heat pump payback math
In Kearny, a heat pump would cost more to run each year than what you have now. Swap a failed furnace and AC for a heat pump rather than buying like-for-like, and the extra cost here runs $3,500 after a $2,000 federal tax credit. The heat pump would cost about $1 more a year to run than the furnace it replaces — a premium with no payback. That's Kearny's own climate and rates talking, not a hedge or a caveat.
Kearny's weather, in the numbers that matter
Kearny has a real but manageable winter — 3881 heating degree days a year against a 65°F base — and summers are hot enough that cooling matters as much as heating, at 1548 cooling degree days. The 99% winter design temperature here — the cold snap equipment must be sized for, not the seasonal average — is 17.1°F, against a record low of 10.9°F. That puts the seasonal coefficient of performance at 3.11 for the recommended cold-climate unit. A cold-climate unit is the right call in Kearny — below 25°F design temperature, a standard heat pump leans hard on electric-resistance backup, which erases most of the savings. Source: NOAA station NEWARK LIBERTY INTERNATIONAL, 5.4 miles from Kearny — the closest one on record.
What it actually costs to run, year to year
Electricity use for heating alone comes out to about 3,160 kWh a year on the 2000-square-foot reference house; folding in cooling puts the electric bill near $1,043 a year. Kearny's gas rate of 14.21 per Mcf, applied to the 40 Mcf a year the furnace burns, puts its running cost near $1,041 a year, against 23.28¢ per kWh for electricity. Priced as a standalone purchase rather than against a like-for-like replacement, equipment payback runs past the 15-year equipment life, for a 15-year net position $3,522 behind.
The other scenario: no gas furnace to begin with
Not every home in Kearny has gas service. Against electric-resistance heat — baseboard or an electric furnace, both 100% efficient but still just resistance — the case for switching gets stronger here. The saving here runs about $1,712 a year, which recovers the extra $8,000 spent going electric in roughly 4.7 years.
Kearny against the rest of the country
Among 3206 cities, Kearny's winter puts it at rank 1595 for severity, while its size puts it at rank 1003 for population — 1 in both cases being the extreme. That's the middle third for winter severity among the cities covered here.
Deciding what's next in Kearny, NJ
Kearny, New Jersey is home to about 40,866 people, and the figures above are the same ones a local HVAC contractor uses to size and quote a system — this site doesn't guess where a real quote would land, it just tells you whether it's worth asking for one. In Kearny, nothing is lost by holding off until the current equipment genuinely fails.
Get quotes from local HVAC contractors before deciding.
Where Kearny's figure comes from
Nothing above is a black box: the methodology guide shows the full arithmetic behind Kearny's 3.11 seasonal COP and payback figure. Kearny's 17.1°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.