Oahu split AC cost: typical ranges + your written quote
Answer a few quick questions. See typical Oahu market ranges for split AC, the Hawaii Energy rebate rules that apply, and request a free written quote for your home.
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What does a split AC cost on Oahu?
The straight answer before you take the quiz: typical island-wide prices for a complete split AC install, and the Hawaii Energy instant rebates that come off them. Your written price comes after a free in-home visit.
Typical fully installed split AC prices on Oahu
Market ranges for a complete installation, not a quote for your home. A complete price includes equipment, line set, electrical, permit where required, mounting, wall work, removal of the old unit, start-up and GET.
| System | Installed price |
|---|---|
| Single-zone (one indoor head) | $3,500–$7,500 |
| 2 zones | $7,000–$11,000 |
| 3-4 zones | $10,000–$15,000 |
| 5+ zones | $15,000–$22,000 or more |
Oahu market ranges as of October 2026. Rebates below come off these figures.
Hawaii Energy instant rebates, program year through 30 June 2027
Taken off your invoice, not claimed later. First-come, first-served while program funds last. Requires a Hawaiian Electric account, so Kauai (KIUC) is not eligible, and the work must be done by a Hawaii Energy Clean Energy Ally except where noted.
| What qualifies | Rebate | Counted |
|---|---|---|
| Split AC / mini-splitSet by the outdoor unit's size and SEER2 rating: $450 from 8,000 to under 20,000 BTU at 17.2+ SEER2, which covers 9,000 and 12,000 BTU units (they earn nothing below 17.2); $550 starts at 30,000 BTU. Counted per condenser, so three single-zone systems earn three rebates while one multi-zone earns one. Newly constructed homes do not qualify; newly purchased homes do. | $400-$550 | per outdoor unit (condenser) |
| Central AC retrofitOld outdoor unit must be 13.0 SEER or lower and the new one 15.2 SEER2 or better. Pre-approval from Hawaii Energy is required before the work starts. | $1,250 | per system |
| AC tune-upCentral or split. Must be a multi-point tune-up performed by a Clean Energy Ally. | $75 | per condenser, up to 2 a year |
| ENERGY STAR window ACInstant at participating retailers; no contractor needed. The higher amount is for dual-inverter models. | $25-$45 | per unit |
Amounts verified October 2026 against Hawaii Energy's published residential cooling rebates. Program funds are limited, so confirm before you buy.