Lake Grove, NY: the heat pump payback math
Lake Grove is a place where a heat pump genuinely costs more to operate than the alternative. Against a like-for-like gas furnace and AC swap, going electric costs $3,500 more up front here (already netting out a $2,000 tax credit). The heat pump would cost about $128 more a year to run than the furnace it replaces — a premium with no payback. That's Lake Grove's own climate and rates talking, not a hedge or a caveat.
Lake Grove's weather, in the numbers that matter
4509 heating degree days pile up here every year, so Lake Grove has a real but manageable winter; the cooling side runs to 923 cooling degree days, where summers add a moderate cooling load. 17.1°F is the figure equipment gets sized against here — the 99th-percentile cold snap, not an average day — with a record low of 10°F on file. Worked through the model, that's a seasonal COP of 3.11 on the cold-climate unit fit for this climate. Below the 25°F line where a standard machine starts leaning on resistance backup, Lake Grove sits firmly in cold-climate territory, so that's the class of unit priced here. Source: NOAA station LONG ISLAND MAC ARTHUR AIRPOR, 4.5 miles from Lake Grove — the closest one on record.
The month-to-month numbers for Lake Grove
Electricity use for heating alone comes out to about 3,671 kWh a year on the 2000-square-foot reference house; folding in cooling puts the electric bill near $1,303 a year. The gas furnace it replaces burns roughly 47 Mcf a year at 17.58 per Mcf here, for a running cost near $1,175 a year (electricity here runs 29.22¢/kWh). Buy it outright, not incrementally, and payback stretches to beyond the 15-year equipment life; over 15 years the net position sits $5,414 behind.
If your home heats with electric baseboard instead of gas
Gas isn't universal in Lake Grove — 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 $2,383 a year, which recovers the extra $8,000 spent going electric in roughly 3.4 years.
Where Lake Grove ranks in this dataset
Lake Grove lands at position 1194 out of 3206 cities on heating severity (coldest is 1), and 2968 out of 3206 by population size (biggest is 1). That's the middle third for winter severity among the cities covered here.
Deciding what's next in Lake Grove, NY
Lake Grove, New York is home to about 11,109 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 Lake Grove, nothing is lost by holding off until the current equipment genuinely fails.
Get quotes from local HVAC contractors before deciding.
Where Lake Grove's figure comes from
Every constant behind this page — the 3.11 seasonal COP, the degree-day corrections, the equipment costs — is documented in the methodology guide. At a 17.1°F design temperature, Lake Grove sits in cold-climate territory; the guide to that class of unit explains why.