Should Trenton switch to a heat pump?

Here in Trenton, the honest answer is that a heat pump raises your annual running cost. 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. Unfortunately the electric bill outweighs the gas bill it replaces by about $104 a year here, so the extra spend stays unrecovered. That's Trenton's own climate and rates talking, not a hedge or a caveat.

How cold Trenton actually gets

Trenton has a real but manageable winter — 4479 heating degree days a year against a 65°F base — and summers are hot enough that cooling matters as much as heating, at 1128 cooling degree days. Sizing runs off the design temperature, not the average day: 12°F here (record low 5°F), which works out to a seasonal COP of 2.99 for the cold-climate class of unit this climate calls for. Below the 25°F line where a standard machine starts leaning on resistance backup, Trenton sits firmly in cold-climate territory, so that's the class of unit priced here. Source: NOAA station TRENTON MERCER AIRPORT, 4.6 miles from Trenton — the closest one on record.

What it actually costs to run, year to year

Modelled on a typical 2000-square-foot house, the heat pump draws about 3,793 kWh a year to keep it warm, plus cooling, for a combined electric bill near $1,107 a year. That compares with roughly 47 Mcf a year of gas at Trenton's 14.21 per-Mcf rate — about $1,003 a year — against a local electricity rate of 23.28¢/kWh. 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 $5,056 behind.

Electric resistance heat in Trenton, compared

Gas isn't universal in Trenton — many houses run on electric heat already. Compared with baseboard or electric-furnace resistance heat, the numbers shift in the heat pump’s favor. The saving here runs about $1,874 a year, which recovers the extra $8,000 spent going electric in roughly 4.3 years.

Trenton against the rest of the country

Ranked against the other 3206 cities covered, Trenton comes in at 1214 for heating severity — 1 would be the coldest place in the dataset — and 385 by population, where 1 is largest. That's the middle third for winter severity among the cities covered here.

Next step for 91,193 people in Trenton

Trenton, New Jersey is home to about 91,193 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 Trenton, nothing is lost by holding off until the current equipment genuinely fails.

Ask a local HVAC contractor for a quote before committing either way.

Where Trenton's figure comes from

The methodology guide walks through exactly how Trenton's 2.99 seasonal COP and the rest of this page's numbers get built. Trenton's 12°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.