# ACiQ Extreme 18,000 BTU ceiling cassette system

> ACiQ Extreme 18,000 BTU ceiling cassette system (ACIQ-18ZPL-HP230C / ACIQ-18CC-HH-MC) is a 18,000 BTU system from ACiQ Extreme. It has a ceiling cassette indoor unit, runs on 208/230V, is rated 20 SEER2, has an HSPF2 of 12.3, puts out 17,000 BTU/h of heat at 5 °F, uses R-454B refrigerant, and carries a 12-year compressor warranty. Lowest in-stock price on file: $2,249.99 at HVACDirect (checked Oct 14, 2026).

- Line: [ACiQ Extreme](https://minisplitfacts.com/lines/aciq-extreme/)
- Category: [Single-zone systems](https://minisplitfacts.com/compare/single-zone/)
- Size tier within its line: 18k
- Status: current
- Data confidence: confirmed (last verified 2026-10-14; [what this means](https://minisplitfacts.com/how-we-compare/#confidence))
- Page: https://minisplitfacts.com/products/aciq-extreme-18k-cassette/

## Specifications

| Spec | Value | Source |
|---|---|---|
| Model number | ACIQ-18ZPL-HP230C / ACIQ-18CC-HH-MC | [hvacdirect.com](https://hvacdirect.com/18-000-btu-23-seer-aciq-single-zone-ceiling-cassette-mini-split-system-extreme-series-id198938.html) (retailer, page, 2026-10-14) |
| Size | 18,000 BTU/h | [hvacdirect.com](https://hvacdirect.com/18-000-btu-23-seer-aciq-single-zone-ceiling-cassette-mini-split-system-extreme-series-id198938.html) (retailer, page, 2026-10-14) |
| Indoor unit style | Ceiling cassette | [hvacdirect.com](https://hvacdirect.com/18-000-btu-23-seer-aciq-single-zone-ceiling-cassette-mini-split-system-extreme-series-id198938.html) (retailer, page, 2026-10-14) |
| Voltage | 208/230V | [hvacdirect.com](https://hvacdirect.com/18-000-btu-23-seer-aciq-single-zone-ceiling-cassette-mini-split-system-extreme-series-id198938.html) (retailer, page, 2026-10-14) |
| Outdoor unit model | ACIQ-18ZPL-HP230C | [hvacdirect.com](https://hvacdirect.com/18-000-btu-23-seer-aciq-single-zone-ceiling-cassette-mini-split-system-extreme-series-id198938.html) (retailer, page, 2026-10-14) |
| Indoor unit model | ACIQ-18CC-HH-MC | [hvacdirect.com](https://hvacdirect.com/18-000-btu-23-seer-aciq-single-zone-ceiling-cassette-mini-split-system-extreme-series-id198938.html) (retailer, page, 2026-10-14) |
| SEER2 (cooling efficiency) | 20 | [energystar.gov](https://www.energystar.gov/productfinder/product/certified-heat-pumps/details/3723263) (certification, feed, 2026-10-14) |
| EER2 (efficiency at 95 °F) | 12.5 | [energystar.gov](https://www.energystar.gov/productfinder/product/certified-heat-pumps/details/3723263) (certification, feed, 2026-10-14) |
| HSPF2 (heating efficiency) | 12.3 | [energystar.gov](https://www.energystar.gov/productfinder/product/certified-heat-pumps/details/3723263) (certification, feed, 2026-10-14) |
| Rated cooling capacity | 16,000 BTU/h | [energystar.gov](https://www.energystar.gov/productfinder/product/certified-heat-pumps/details/3723263) (certification, feed, 2026-10-14) |
| Heating capacity at 47 °F | 19,000 BTU/h | [energystar.gov](https://www.energystar.gov/productfinder/product/certified-heat-pumps/details/3723263) (certification, feed, 2026-10-14) |
| Heating capacity at 17 °F | 14,900 BTU/h | [energystar.gov](https://www.energystar.gov/productfinder/product/certified-heat-pumps/details/3723263) (certification, feed, 2026-10-14) |
| Heating capacity at 5 °F | 17,000 BTU/h | [energystar.gov](https://www.energystar.gov/productfinder/product/certified-heat-pumps/details/3723263) (certification, feed, 2026-10-14) |
| COP at 5 °F | 1.9 | [energystar.gov](https://www.energystar.gov/productfinder/product/certified-heat-pumps/details/3723263) (certification, feed, 2026-10-14) |
| Heats down to | not published |  |
| Refrigerant | R-454B | [energystar.gov](https://www.energystar.gov/productfinder/product/certified-heat-pumps/details/3723263) (certification, feed, 2026-10-14) |
| ENERGY STAR certified | yes | [energystar.gov](https://www.energystar.gov/productfinder/product/certified-heat-pumps/details/3723263) (certification, feed, 2026-10-14) |
| ENERGY STAR cold climate | yes | [energystar.gov](https://www.energystar.gov/productfinder/product/certified-heat-pumps/details/3723263) (certification, feed, 2026-10-14) |
| Line connection | not published |  |
| Wi-Fi control | not published |  |
| Indoor sound level (quietest) | not published |  |
| Outdoor sound level | 59 dB(A) | [hvacdirect.com](https://hvacdirect.com/18-000-btu-23-seer-aciq-single-zone-ceiling-cassette-mini-split-system-extreme-series-id198938.html) (retailer, page, 2026-10-14) |
| Compressor warranty | 12 years | [aciq.com](https://aciq.com/wp-content/uploads/2025/04/Standard-and-Extreme-Mini-Splits-Warranty.pdf) (brand, pdf, 2026-10-14) |
| Parts warranty | 7 years | [aciq.com](https://aciq.com/wp-content/uploads/2025/04/Standard-and-Extreme-Mini-Splits-Warranty.pdf) (brand, pdf, 2026-10-14) |
| Warranty if you install it yourself | Licensed installer required | [aciq.com](https://aciq.com/wp-content/uploads/2025/04/Standard-and-Extreme-Mini-Splits-Warranty.pdf) (brand, pdf, 2026-10-14) |
| Outdoor unit size (W×D×H) | 35.04 × 13.46 × 26.5 in | [hvacdirect.com](https://hvacdirect.com/18-000-btu-23-seer-aciq-single-zone-ceiling-cassette-mini-split-system-extreme-series-id198938.html) (retailer, page, 2026-10-14) |
| Indoor unit size (W×D×H) | 22.44 × 22.44 × 9.65 in | [hvacdirect.com](https://hvacdirect.com/18-000-btu-23-seer-aciq-single-zone-ceiling-cassette-mini-split-system-extreme-series-id198938.html) (retailer, page, 2026-10-14) |

## Where to buy

| Store | Price (USD) | Availability | Checked | Link |
|---|---|---|---|---|
| HVACDirect | $2,249.99 | in stock | 2026-10-14 | [View at HVACDirect](https://hvacdirect.com/18-000-btu-23-seer-aciq-single-zone-ceiling-cassette-mini-split-system-extreme-series-id198938.html) |

Prices are re-checked weekly; a date more than a month old means the store could not be re-read.

## The equivalent in other lines

Same category, same size tier (18k), different line:

- [ACiQ Standard 18,000 BTU ceiling cassette system](https://minisplitfacts.com/products/aciq-standard-18k-cassette/) — $1,944.99
- [ACiQ Standard 18,000 BTU slim ceiling cassette system](https://minisplitfacts.com/products/aciq-standard-18k-cassette-slim/) — $2,124.99
- [ACiQ Standard 18,000 BTU floor console system](https://minisplitfacts.com/products/aciq-standard-18k-console/) — $2,088.99
- [ACiQ Standard 18,000 BTU concealed duct system](https://minisplitfacts.com/products/aciq-standard-18k-duct/) — $2,044.99
- [ACiQ Standard 18,000 BTU wall mount system](https://minisplitfacts.com/products/aciq-standard-18k-wall/) — $1,399.99
- [Daikin Atmosphera 18,000 BTU wall mount system](https://minisplitfacts.com/products/daikin-atmosphera-18k-wall/) — $2,980
- [Daikin Aurora 18,000 BTU wall mount system](https://minisplitfacts.com/products/daikin-aurora-18k-wall/) — $2,759
- [Daikin Entra 18,000 BTU wall mount system](https://minisplitfacts.com/products/daikin-entra-18k-wall/) — $1,457.99


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MiniSplit Facts lists modular tool storage from every brand side by side, with a source for every spec. [How we compare](https://minisplitfacts.com/how-we-compare/). Data as of 2026-10-14.