Regional cost guide
Maine mini-split cost guide
Much of Maine is climate zone 6 / 7. Electricity here runs 28.63 cents per kilowatt-hour, so a typical 12,000 BTU system costs about $853 a year to run. 2 rebate programs below can cut the installed price. Installed prices are mostly national — labor is the part that varies locally.
- Residential rate
- 28.63 c/kWh
- Rate source
- EIA, May 2026
Climate Profile
State-level range
Much of Maine is climate zone 6 / 7.
These are statewide figures. Climate and electricity rates vary a lot inside a state, so check your own ZIP code before sizing a system around them.
Operating-Cost Example
Operating-cost example
$853per year
Example: 12k BTU/h system at 20 SEER2 / 10 HSPF2 using default annual operating hours.
Cooling
$47 monthly / 1,955.4 kWh yearly
Heating
$24 monthly / 1,024.8 kWh yearly
- Capacity
- 12,000 BTU/h
- Efficiency
- SEER2 20 / HSPF2 10
- Rate
- 28.63 c/kWh
Typical Sizes And Installed Cost
Equipment, materials, electrical work and permits are priced the same everywhere. Only the labor line is adjusted to this state, which is why these ranges sit close to the national ones.
| Size | Equipment | DIY installed | Pro installed | Source |
|---|---|---|---|---|
| 9k BTU/h | $900 to $1,900 | $1,670 to $5,015 | $3,156 to $8,644 | National ranges, with labor adjusted to this state |
| 12k BTU/h | $1,000 to $2,400 | $1,820 to $5,665 | $3,508 to $9,697 | National ranges, with labor adjusted to this state |
| 18k BTU/h | $1,400 to $3,200 | $2,320 to $6,715 | $4,310 to $11,554 | National ranges, with labor adjusted to this state |
| 24k BTU/h | $1,800 to $4,200 | $2,870 to $8,015 | $5,163 to $13,660 | National ranges, with labor adjusted to this state |
Matched Cold-Climate Systems
LG
LG ARTCOOL Deluxe R-32 9,000 BTU (230V)
Cooling
Heating
Low ambient
Efficiency
LG
LG ARTCOOL Deluxe R-32 12,000 BTU (230V)
Cooling
Heating
Low ambient
Efficiency
GE Appliances
GE Appliances Endure 9,000 BTU R-454B 208/230V (GS09WP2BEA / 1G09ED2BEA)
Cooling
Heating
Low ambient
Efficiency
Haier
Haier Arctic Series Premium Highwall 9,000 BTU R-454B 208/230V (QS09WP2BEA / 1Q09RT2BEA)
Cooling
Heating
Low ambient
Efficiency
GE Appliances
GE Appliances Endure 12,000 BTU R-454B 208/230V (GS12WP2BEA / 1G12ED2BEA)
Cooling
Heating
Low ambient
Efficiency
Haier
Haier Arctic Series Premium Highwall 12,000 BTU R-454B 208/230V (QS12WP2BEA / 1Q12RT2BEA)
Cooling
Heating
Low ambient
Efficiency
Incentives
STATE_REBATE
Efficiency Maine $3,000 Supplemental Heat Pump Rebate for Low-Income Households
Applications open
Efficiency Maine publishes the supplemental low-income heat pump rebate and requires claim filing within six months, with no closure stated.
Covers mini-splits
Packet eligibility names one rebate-eligible heat pump and an outdoor unit on the rebate-eligible list.
Income-qualified program
Low-income verification through MaineCare, HEAP, SNAP, or TANF.
$3,000 for one rebate-eligible heat pump, counted toward the household lifetime maximum.
- Equipment
- One rebate-eligible heat pump in an owner-occupied principal residence.
- Efficiency
- Outdoor unit on the rebate-eligible list and meeting the design-temperature requirement.
- Install
- Installed by an Efficiency Maine Residential Registered Vendor; claim filed within six months.
STATE_REBATE
Efficiency Maine Whole-Home Heat Pump Rebates
Applications open
Efficiency Maine publishes current whole-home heat pump rebate tiers with no program closure stated.
Covers mini-splits
Packet eligibility names non-ducted systems paid per rebate-eligible outdoor unit.
Income tiers affect amount
Low-income, moderate-income, and any-income tiers have different amounts.
Low income $9,000 ducted or $3,000 per rebate-eligible outdoor unit; moderate income $6,000 ducted or $2,000 per outdoor unit; any income $3,000 ducted or $1,000 per outdoor unit.
- Equipment
- Whole-home heat pump systems, including non-ducted systems paid per rebate-eligible outdoor unit.
- Efficiency
- Rebate-eligible heat pump outdoor units.
- Install
- Heat pumps used as the primary heating system; Efficiency Maine program rules apply.
Federal credit timing and state-program caveats are covered in the mini-split rebates and tax credits guide.
Code Notes
- Maine MUBEC applies statewide, but municipalities with more than 4,000 residents must enforce it while municipalities with 4,000 or fewer residents may choose whether to enforce it.
- Electrical installation work generally needs a permit before installation unless a statutory exception or municipal electrical permit process applies; Maine law caps the combined state electrical permit and inspection service fee at $100, but municipal permit fees vary.
Sources
- SplitAtlas: IECC predominant-zone-by-state mapping - editorial v1Sourced Jul 2026
Covers climate zone.
- SplitAtlas: IECC predominant-zone-by-state mapping - editorial v1Sourced Aug 2026
Covers climate zone.
Covers code note.
Covers electrical permit note.
- U.S. Energy Information Administration: Electric Power Monthly Table 5.6.A, June 2026 residential electricity ratesSourced Jul 2026
Covers electricity rate cents per kwh.
- U.S. Energy Information Administration: Electric Power Monthly Table 5.6.A, June 2026 residential electricity ratesSourced Aug 2026
Covers electricity rate cents per kwh.
Covers labor cost multiplier.
- Operating-cost calculator methodology
Example calculation assumptions.
- Installation-cost calculator methodology
National planning ranges for equipment and installation.