How Much to Run a Mini Split in Connecticut? $1,459/Winter
Running ductless mini-split in Connecticut costs about $0.57 an hour and roughly $1,459 for the winter — 2,000 W for 14.2 hours a day at 28.26¢/kWh.
· Source: EIA Electric Power Monthly Table 5.6.A (July 2026 data) · next EIA update ~Oct 23
On this page: CalculatorTableHow we calculatedSources
Jump to calculator ↓Slider nudges the Connecticut rate; the URL keeps it.
- Per hour
- $0.57 at 28.26¢/kWh
- Per winter
- $1,459 (182 days)
- Hours per day
- 14.2 (NOAA state heating degree-days-scaled)
- Degree-days used
- 5,282 (NOAA CPC state, population-weighted)
- Wattage
- 2,000 W (typical 400–3,500)
- Connecticut rate
- 28.26¢ (October 2025–March 2026 average)
- Rank of 20 cold states
- 6 (6th most expensive)
Why this number
Connecticut runs ductless mini-split longer than the national baseline in October–March — 14.2 hours a day on the NOAA state degree-day scaling used here, against 9.4 nationally — and pays 28.26¢/kWh for it. Those two numbers, times 2,000 W, are the whole $1,459.
Ductless mini-split cost in Connecticut by hours per day — per day / per winter
| Hours per day | Connecticut avg 28.26¢ | Connecticut Light & Po 25.3¢ | United Illuminating Co 31.1¢ | Constellation NewEnerg 12.7¢ |
|---|---|---|---|---|
| 1 h | $0.57 / $103 | $0.51 / $92 | $0.62 / $113 | $0.25 / $46 |
| 2 h | $1.13 / $206 | $1.01 / $184 | $1.24 / $226 | $0.51 / $92 |
| 4 h | $2.26 / $411 | $2.02 / $368 | $2.49 / $453 | $1.02 / $185 |
| 6 h | $3.39 / $617 | $3.04 / $553 | $3.73 / $679 | $1.52 / $277 |
| 8 h | $4.52 / $823 | $4.05 / $737 | $4.98 / $906 | $2.03 / $370 |
| 12 h | $6.78 / $1,234 | $6.07 / $1,105 | $7.46 / $1,358 | $3.05 / $555 |
What Connecticut’s utilities charge for it
| Utility | Residential customers | ¢/kWh (EIA-861 2024) | Per hour | Per winter at 14.2 h/day |
|---|---|---|---|---|
| Connecticut Light & Power Co | 1,174,420 | 25.3¢ | $0.51 | $1,306 |
| United Illuminating Co | 312,291 | 31.1¢ | $0.62 | $1,606 |
| Constellation NewEnergy, Inc | 125,376 | 12.7¢ | $0.25 | $656 |
What the numbers say about ductless mini-split in Connecticut
Connecticut logged 5,282 population-weighted heating degree-days over October–March (NOAA CPC state series), 151% of the CONUS figure of 3,500, which is why this page runs ductless mini-split 14.2 hours a day against the national 9.4 — 4.8 hours more. At Connecticut’s October 2025–March 2026 average rate of 28.26¢/kWh that makes it the 6th most expensive of the 20 cold states for ductless mini-split: $1,459 for the 182-day winter, against Nebraska’s $552 and Maine’s $1,886. Connecticut Light & Power Co, Connecticut’s largest utility with 1,174,420 residential customers, averages 25.3¢ — $1,306 for the same hours — while Constellation NewEnergy, Inc at 12.7¢ comes to $656, a $651 spread on identical use. Per million Btu delivered, this unit at the NEEP median COP of 2.17 costs $38.17 against $17.68 for natural gas at Connecticut’s winter average of $1.68/therm, which is the whole-house comparison the Connecticut heating page works through. Connecticut’s winter-average rate (28.26¢) sits 4.10¢ above its July 2026 reading of 24.16¢; the season figure uses the winter average because that is when ductless mini-split runs.
Frequently asked questions
How much does it cost to run ductless mini-split per hour in Connecticut?
$0.57 an hour for a 2,000 W unit at Connecticut’s October 2025–March 2026 average average of 28.26¢/kWh (2,000 ÷ 1,000 × 0.2826); at Connecticut Light & Power Co’s 25.3¢ it is $0.51.
How much does ductless mini-split cost for the whole winter in Connecticut?
About $1,459: 2,000 W × 14.2 hours a day × 182 days (October–March) × 28.26¢. The hours are the national 9.4 h/day scaled by NOAA CPC state population-weighted HDD, October 2025–March 2026 (5,282 against the CONUS 3,500); enter your own hours above for your own figure.
Is ductless mini-split expensive to run in Connecticut compared with other cold states?
Connecticut is the 6th most expensive of the 20 cold states on this site at $1,459 a winter; the range runs from Nebraska ($552) to Maine ($1,886), driven almost entirely by the electricity rate.
How we calculated this
Worked for ductless mini-split in Connecticut: 2,000 W ÷ 1,000 × 0.2826 $/kWh = $0.57 per hour; hours per day = 9.4 × (5,282 ÷ 3,500) = 14.2; 2,000 ÷ 1,000 × 14.2 × 182 × 0.2826 = $1,459 for the winter. Rate: EIA Electric Power Monthly 5.6.A (October 2025–March 2026 average); degree-days: NOAA CPC state population-weighted HDD, October 2025–March 2026, against the CONUS total; utility prices: EIA-861 2024.Sources: U.S. Energy Information Administration (EIA) electricity rates · DSIRE incentive records · public IRS/OBBBA guidance. Figures are modeled estimates, not quotes or tax advice. See our methodology.
Where to go next
- Cost to run ductless mini-split (national page) — The 2,000 W and 9.4 h/day baseline this page scales for Connecticut, with the sourced benchmark.
- Cost to heat a home in Connecticut — Gas, propane, oil, heat pump and resistance per MMBtu at Connecticut’s own prices — the whole-house picture.
- Find your electricity rate by ZIP — Connecticut averages 28.26¢ but its utilities span the table above — send your own rate into this calculator.
- Solar panel cost in Connecticut — Connecticut’s 24.16¢ July rate, utilities and rate history on the solar side.
- Cost to run space heater in Connecticut — Same Connecticut rates and degree-days applied to a 1,500 W space heater.
- Cost to run heat pump in Connecticut — Same Connecticut rates and degree-days applied to a 3,500 W heat pump.
- Cost to run ductless mini-split in New York — $1,485 for the winter at 27.96¢ and 14.6 h/day — the nearest cold-state comparison.
- Cost to run ductless mini-split in Vermont — $1,557 for the winter at 23.81¢ and 18.0 h/day — the nearest cold-state comparison.