Do heat pumps work in New Haven winters?

New Haven sees about 29 nights a year at or below 20°F. A cold-climate certified model keeps the house warm without leaning on backup heat. The average winter low is 25°F, and the heating season adds up to 5,455 heating degree days (NOAA 1991-2020 normals).

How much does it cost to run a heat pump in New Haven?

A typical 3-ton central heat pump (17.0 SEER2, 9.0 HSPF2) uses about $2,482 of electricity a year for heating and $328 for cooling in New Haven, at the Connecticut average of 28.2¢/kWh. The most efficient models cost less - see the rankings above.

Is a heat pump cheaper than a gas furnace in New Haven?

Not on heating alone at today's prices: about $2,482 a year with a typical heat pump versus $1,351 with a 95% gas furnace (Connecticut averages: 28.2¢/kWh, $1.62/therm). A high-HSPF2 model narrows the gap, and a heat pump also replaces the air conditioner. Against propane, oil or electric heat it is usually far cheaper.

What size heat pump do I need for a 2,000 sq ft house in New Haven?

With average insulation, roughly a 4-ton system: the estimated cooling load is 27,600 BTU/h and the heating load 46,000 BTU/h. Use the size calculator for your own house, and ask installers for a Manual J calculation.

Cold winters · Mild summers

Best heat pumps for New Haven, CT

New Haven sees about 29 nights a year at or below 20°F. A cold-climate certified model keeps the house warm without leaning on backup heat.

A typical heat pump costs about $2,482 a year to heat a house here and $328 to cool it. A 95% gas furnace would cost $1,351 for the same heat.

Nights at or below 0°F0.7 a year
Nights at or below 20°F29 a year
Days at or above 90°F6 a year
Average winter low25°F
Average summer high80°F
Electricity28.2¢ per kWh
Natural gas$1.62 per therm

Cheapest to run in New Haven

Ranked by yearly electricity cost in this climate, so the balance of heating and cooling efficiency is the one that matters here. Cold-climate certified models only.

Best 12,000 BTU mini-split

MDV MOX430-12HFN1-MZ60W

12,000 BTU mini-split · MSOP series · cold-climate certified

SEER2: 27.5
HSPF2: 14.5
Per year here: $581

For one large room.

Full specs and running cost

Best 24,000 BTU mini-split

SLIMAIR SHC24VH2AG

24,000 BTU mini-split · SHC Series · cold-climate certified

SEER2: 27.5
HSPF2: 14.5
Per year here: $1,162

For open-plan floor or small home.

Full specs and running cost

Best 3-ton central heat pump

TOSHIBA CARRIER MCY-MUB0368HS2P-UL

3 ton central · cold-climate certified

SEER2: 29.7
HSPF2: 12.2
Per year here: $2,019

For typical whole house.

Full specs and running cost

Running cost calculator for New Haven

Pre-filled with New Haven's climate and Connecticut prices. Pick a model, tell it what you heat with today, and add your quote.

Heat pump $1,841/yrCosts more by $399/yrSee details ↓

1. Where you live

StateCityElectricity ¢ per kWh

Adjust heating and cooling hours

Filled in from your city's climate. Change them if you run the system much more or less than usual.

Cooling hours full-load hours per yearHeating hours full-load hours per year

2. The heat pump pick a model or type its ratings

Find a model (fills in the ratings below)

SEER2 cooling efficiencyHSPF2 heating efficiencyCooling capacity BTU/hHeating capacity BTU/h

3. What it replaces

Current heatingFurnace efficiency (AFUE %)Gas price, $/thermCurrent coolingOld AC rating SEER2 (10 ≈ 15+ years old)

4. Price replace the example with your quote

Installed price, $Rebates and incentives, $ utility, state

Heat pump, per year: $1,841
Current system, per year: $1,441
Costs more per year: $399
Payback: No payback
Net after 10 years: -$12,991

Cooling $186Heating $1,654Electricity used: 6,527 kWhSaved vs. a minimum-efficiency heat pump: $405

Estimates use the unit's rated SEER2 and HSPF2, full-load hours derived from NOAA 1991-2020 degree days, average residential electricity prices from the U.S. EIA (12 months to July 2026) and fuel prices from EIA (2025 for natural gas, week of 2026-10-05 for propane and heating oil). Very cold days that need backup heat are not modelled. Federal minimum for comparison: 14.3 SEER2 / 7.5 HSPF2.

More for New Haven

Top 5 12,000 BTU mini-splitsfrom $581/yr

Model	SEER2	HSPF2	Per year
MDV MOX430-12HFN1-MZ60W	27.5	14.5	$581
Goodman MSH123G26MCAA	27.5	14.5	$581
Fujitsu AOUH12KTAP1	31.5	13.7	$603
Fujitsu AOUG12LZAS1	29.4	12.9	$640
Fujitsu AOUH12KZAH1	30.5	12.7	$647

All 12,000 BTU mini-splits

Top 5 24,000 BTU mini-splitsfrom $1,162/yr

Model	SEER2	HSPF2	Per year
SLIMAIR SHC24VH2AG	27.5	14.5	$1,162
MDV MOD30-24HFN10-M1X	22.3	13.5	$1,270
Arcoaire D5CSHAH24AAK	21.2	13.5	$1,279
Comfort-Aire A-VHP24SA-1	21.0	13.5	$1,280
Mainline ML24HP230NEXH-O	22.3	13.3	$1,286

All 24,000 BTU mini-splits

Top 5 3-ton central heat pumpsfrom $2,019/yr

Model	SEER2	HSPF2	Per year
TOSHIBA CARRIER MCY-MUB0368HS2P-UL	29.7	12.2	$2,019
LG KUSXA361A	23.5	10.5	$2,365
Trane 5TWV0X36A1	21.0	10.5	$2,393
Lennox SL22KLV-036-230A	20.5	10.5	$2,399
LG KUSXB361A	22.0	10.3	$2,422

All 3-ton central heat pumps

Heat pump vs. gas, propane and oilgas is cheaper to run

Yearly cost to heat a typical house (36,000 BTU/h of heat, 2,200 full-load hours) at Connecticut prices.

Natural gas furnace, 95% AFUE$1,351/yr
Natural gas furnace, 80% AFUE$1,604/yr
Heat pump (typical, 9.0 HSPF2)$2,482/yr
Propane furnace, 95% AFUE$3,841/yr
Heating oil, 85% AFUE$4,039/yr
Electric baseboard or furnace$6,546/yr

Electricity and natural gas: Connecticut residential averages from the U.S. EIA; propane and heating oil: latest EIA weekly prices.

Month by monthpeak $486 in January

Heating and cooling degree days (NOAA 1991-2020 normals) and what a typical 3-ton heat pump costs in each month at 28.2¢/kWh.

Month	Heating DD	Cooling DD	Cost
January	1,068	0	$486
February	923	0	$420
March	820	0	$373
April	494	1	$225
May	215	15	$104
June	36	121	$68
July	2	277	$120
August	3	246	$107
September	63	93	$69
October	331	10	$155
November	611	0	$278
December	890	0	$405

What size heat pump for a New Haven home?4 ton for 2,000 sq ft

1,000 sq ft house2 ton · heating load 23,000 BTU/h
1,500 sq ft house3 ton · heating load 34,500 BTU/h
2,000 sq ft house4 ton · heating load 46,000 BTU/h
2,500 sq ft house5 ton · heating load 57,500 BTU/h

Average insulation, 8 ft ceilings. Size calculator for your own home

Questions4

Do heat pumps work in New Haven winters?: New Haven sees about 29 nights a year at or below 20°F. A cold-climate certified model keeps the house warm without leaning on backup heat. The average winter low is 25°F, and the heating season adds up to 5,455 heating degree days (NOAA 1991-2020 normals).
How much does it cost to run a heat pump in New Haven?: A typical 3-ton central heat pump (17.0 SEER2, 9.0 HSPF2) uses about $2,482 of electricity a year for heating and $328 for cooling in New Haven, at the Connecticut average of 28.2¢/kWh. The most efficient models cost less - see the rankings above.
Is a heat pump cheaper than a gas furnace in New Haven?: Not on heating alone at today's prices: about $2,482 a year with a typical heat pump versus $1,351 with a 95% gas furnace (Connecticut averages: 28.2¢/kWh, $1.62/therm). A high-HSPF2 model narrows the gap, and a heat pump also replaces the air conditioner. Against propane, oil or electric heat it is usually far cheaper.
What size heat pump do I need for a 2,000 sq ft house in New Haven?: With average insulation, roughly a 4-ton system: the estimated cooling load is 27,600 BTU/h and the heating load 46,000 BTU/h. Use the size calculator for your own house, and ask installers for a Manual J calculation.

Nearby cities

Climate: NOAA 1991-2020 normals, station NEW HAVEN TWEED AP (6 km away).