SplitAtlas

Regional cost guide

Delaware mini-split cost guide

Much of Delaware is climate zone 4A. Electricity here runs 19.29 cents per kilowatt-hour, so a typical 12,000 BTU system costs about $575 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.

Operating costInstalled cost
Residential rate
19.29 c/kWh
Rate source
EIA, June 2026

Climate Profile

State-level range

Much of Delaware is climate zone 4A.

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

$575per year

Example: 12k BTU/h system at 20 SEER2 / 10 HSPF2 using default annual operating hours.

Cooling

$31 monthly / 1,955.4 kWh yearly

Heating

$16 monthly / 1,024.8 kWh yearly

Capacity
12,000 BTU/h
Efficiency
SEER2 20 / HSPF2 10
Rate
19.29 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.

Installed-cost ranges by capacity
SizeEquipmentDIY installedPro installedSource
9k BTU/h$900 to $1,900$1,670 to $5,015$3,174 to $8,692National ranges, with labor adjusted to this state
12k BTU/h$1,000 to $2,400$1,820 to $5,665$3,529 to $9,750National ranges, with labor adjusted to this state
18k BTU/h$1,400 to $3,200$2,320 to $6,715$4,335 to $11,617National ranges, with labor adjusted to this state
24k BTU/h$1,800 to $4,200$2,870 to $8,015$5,191 to $13,734National ranges, with labor adjusted to this state

Incentives

UTILITY_REBATE

Delaware Electric Cooperative 2026 High Efficiency Air Source Heat Pump Grant

Applications open

The official 2026 application accepts completed submissions on a rolling, first-received basis until the calendar-year allocation is awarded.

Covers mini-splits

The 2026 application expressly lists Ductless Mini-Split and Multi-Zone as eligible system types.

Class A: $500/ton at 18 SEER2 capped at $1,500; $750/ton at 20 SEER2 capped at $2,250; or $1,000/ton at 22 SEER2 capped at $3,000. Class B: $500/$750/$1,000 per ton at 16/18/20 IEER2, capped at $5,000/$7,500/$10,000 respectively.

Equipment
Qualifying high-efficiency ducted split, ductless mini-split, multi-zone, or packaged air-source heat pump installed in Delaware on an active DEC distribution-delivery and energy-supply account for the member-owner's energy requirements.
Income
None published.
Efficiency
Class A residential/light-commercial equipment must be at least 18 SEER2; higher tiers begin at 20 and 22 SEER2. Class B commercial equipment must be at least 16 IEER2, with higher tiers at 18 and 20. Equipment must satisfy applicable AHRI, ENERGY STAR, DOE, and third-party certification standards.
Install
Submit the signed application and paid itemized invoice with system, labor, permit, and warranty details; provide Manual J or equivalent sizing and required energy-savings calculations. A five-year parts and labor warranty is required for professional installation. Compliant member self-installation is allowed with a five-year self-warranty and product warranties. Local codes apply.
Delaware Electric Cooperative: 2026 High Efficiency Air Source Heat Pump Grant Program ApplicationSourced Sep 2026

STATE_REBATE

Energize Delaware Home Performance with ENERGY STAR Heat-Pump Incentives

Applications open

The current 2026 program page provides assessment, participating-contractor, approval, and current-amount routes; incentives require a confirmed reservation and remain subject to change.

Covers mini-splits

The current incentive sheet expressly publishes Mini-Split HP tiers and additional indoor-unit amounts.

Income tiers affect amount

Standard Home Performance has no published income ceiling. Assisted Home Performance is available to income-qualified owners and renters through their landlord; the current public page does not expose a numeric ceiling. Military and active-duty first responders have no income requirement, and a separate Downtown Development District eligibility route is published.

Ducted heat pump: $800 standard / $1,200 assisted for tier 1, or $1,600 / $2,200 for tier 2. Mini-split: $550 / $1,000 for tier 1 plus $350 / $600 per additional indoor unit, or $1,100 / $1,700 for tier 2 plus $550 / $900 per additional indoor unit. Mini-split total cap: $4,000 standard or $5,500 assisted.

Equipment
Qualifying ducted air-source or mini-split heat pump installed in a participating Delaware residence after the program's Home Performance assessment and rebate-reservation process.
Efficiency
Ducted tiers are at least 16 SEER2, 11.5 EER2, and 7.8 HSPF2 for tier 1 or 17 SEER2, 12.0 EER2, and 8.2 HSPF2 for tier 2, with separate 4/5-ton thresholds. Mini-split tiers are at least 17 SEER2, 11.7 EER2, and 8.2 HSPF2 for tier 1 or 20 SEER2, 12.0 EER2, and 8.6 HSPF2 for tier 2.
Install
Complete the Home Performance assessment, review the assessment with a program-participating contractor, use that contractor for qualifying work, and obtain the program's rebate reservation. Standard HVAC incentives are capped at the listed amount or 50% of installed cost; assisted incentives are capped at the listed amount or 75%.
Delaware Sustainable Energy Utility, doing business as Energize Delaware: Home Performance with ENERGY STAR - Current Incentive AmountsSourced Sep 2026

Federal credit timing and state-program caveats are covered in the mini-split rebates and tax credits guide.

Code Notes

  • Wilmington requires a permit before work starts. Its current building application lists $12 per $1,000 of construction cost, $20 per trade used (including electric, air conditioning, heating, and mechanical ventilation), and $50 for a Certificate of Compliance. The local authority must determine which trades, inspections, and other fees apply. This is a Wilmington planning data point, not a statewide Delaware fee.

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Sources