# MRCOOL Advantage 5th Gen 18,000 BTU wall mount system

> MRCOOL Advantage 5th Gen 18,000 BTU wall mount system (A-18-HP-230D-O) is a 18,000 BTU system from MRCOOL Advantage 5th Gen. It has a wall mount indoor unit, runs on 208/230V, is rated 19.2 SEER2, has an HSPF2 of 9.6, and comes with a 16 ft line set. Lowest in-stock price on file: $1,145 at Got Ductless (checked Oct 14, 2026).

- Line: [MRCOOL Advantage 5th Gen](https://minisplitfacts.com/lines/mrcool-advantage/)
- 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/mrcool-advantage-18k-wall/

## Specifications

| Spec | Value | Source |
|---|---|---|
| Model number | A-18-HP-230D-O | [hvacdirect.com](https://hvacdirect.com/18-000-btu-mrcool-advantage-5th-gen-19-2-seer2-single-zone-mini-split-r454b-230v-id198423.html) (retailer, page, 2026-10-14) |
| Size | 18,000 BTU/h | [doxrepo.mrcool.com](https://doxrepo.mrcool.com/mc-cat-en-01.pdf) (brand, pdf, 2026-10-14) |
| Indoor unit style | Wall mount | [doxrepo.mrcool.com](https://doxrepo.mrcool.com/mc-cat-en-01.pdf) (brand, pdf, 2026-10-14) |
| Voltage | 208/230V | [doxrepo.mrcool.com](https://doxrepo.mrcool.com/mc-cat-en-01.pdf) (brand, pdf, 2026-10-14) |
| Outdoor unit model | A-18-HP-C-230D-O | [doxrepo.mrcool.com](https://doxrepo.mrcool.com/mc-cat-en-01.pdf) (brand, pdf, 2026-10-14) |
| Indoor unit model | A-18-HP-WMAH-230D-O | [doxrepo.mrcool.com](https://doxrepo.mrcool.com/mc-cat-en-01.pdf) (brand, pdf, 2026-10-14) |
| SEER2 (cooling efficiency) | 19.2 | [doxrepo.mrcool.com](https://doxrepo.mrcool.com/mc-cat-en-01.pdf) (brand, pdf, 2026-10-14) |
| EER2 (efficiency at 95 °F) | 10.8 | [doxrepo.mrcool.com](https://doxrepo.mrcool.com/mc-cat-en-01.pdf) (brand, pdf, 2026-10-14) |
| HSPF2 (heating efficiency) | 9.6 | [doxrepo.mrcool.com](https://doxrepo.mrcool.com/mc-cat-en-01.pdf) (brand, pdf, 2026-10-14) |
| Rated cooling capacity | 18,000 BTU/h | [doxrepo.mrcool.com](https://doxrepo.mrcool.com/mc-cat-en-01.pdf) (brand, pdf, 2026-10-14) |
| Heating capacity at 47 °F | 18,800 BTU/h | [doxrepo.mrcool.com](https://doxrepo.mrcool.com/mc-cat-en-01.pdf) (brand, pdf, 2026-10-14) |
| Heating capacity at 17 °F | not published |  |
| Heating capacity at 5 °F | not published |  |
| COP at 5 °F | not published |  |
| Heats down to | not published |  |
| Refrigerant | not published |  |
| ENERGY STAR certified | not published |  |
| ENERGY STAR cold climate | not published |  |
| Line connection | not published |  |
| Line set included | 16 ft | [hvacdirect.com](https://hvacdirect.com/18-000-btu-mrcool-advantage-5th-gen-19-2-seer2-single-zone-mini-split-r454b-230v-id198423.html) (retailer, page, 2026-10-14) |
| Wi-Fi control | not published |  |
| Indoor sound level (quietest) | not published |  |
| Outdoor sound level | 56 dB(A) | [doxrepo.mrcool.com](https://doxrepo.mrcool.com/mc-cat-en-01.pdf) (brand, pdf, 2026-10-14) |
| Room size (brand's claim) | 800 sq ft | [doxrepo.mrcool.com](https://doxrepo.mrcool.com/mc-cat-en-01.pdf) (brand, pdf, 2026-10-14) |
| Compressor warranty | not published |  |
| Parts warranty | not published |  |
| Warranty if you install it yourself | not published |  |
| Outdoor unit size (W×D×H) | 31.69 × 12.99 × 21.81 in | [doxrepo.mrcool.com](https://doxrepo.mrcool.com/mc-cat-en-01.pdf) (brand, pdf, 2026-10-14) |
| Indoor unit size (W×D×H) | 37.99 × 8.46 × 12.56 in | [doxrepo.mrcool.com](https://doxrepo.mrcool.com/mc-cat-en-01.pdf) (brand, pdf, 2026-10-14) |
| Outdoor unit weight | 72.31 lb | [doxrepo.mrcool.com](https://doxrepo.mrcool.com/mc-cat-en-01.pdf) (brand, pdf, 2026-10-14) |

## Where to buy

| Store | Price (USD) | Availability | Checked | Link |
|---|---|---|---|---|
| Got Ductless | $1,145 | in stock | 2026-10-14 | [View at Got Ductless](https://gotductless.com/products/mr-cool-a-18-hp-wmah-230d-o-a-18-hp-c-230d-o-18-000-btu-19-2-seer2-air-handler-heat-pump-system-230v-r454b) |
| HVACDirect | $1,180 | in stock | 2026-10-14 | [View at HVACDirect](https://hvacdirect.com/18-000-btu-mrcool-advantage-5th-gen-19-2-seer2-single-zone-mini-split-r454b-230v-id198423.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 Extreme 18,000 BTU ceiling cassette system](https://minisplitfacts.com/products/aciq-extreme-18k-cassette/) — $2,249.99
- [ACiQ Extreme 18,000 BTU slim ceiling cassette system](https://minisplitfacts.com/products/aciq-extreme-18k-cassette-slim/) — $2,429.99
- [ACiQ Extreme 18,000 BTU floor console system](https://minisplitfacts.com/products/aciq-extreme-18k-console/) — $2,393.99
- [ACiQ Extreme 18,000 BTU concealed duct system](https://minisplitfacts.com/products/aciq-extreme-18k-duct/) — $2,349.99
- [ACiQ Extreme 18,000 BTU wall mount system](https://minisplitfacts.com/products/aciq-extreme-18k-wall/) — $1,899.99
- [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


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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.