# MRCOOL Olympus 27,000 BTU multi-zone outdoor unit

> MRCOOL Olympus 27,000 BTU multi-zone outdoor unit (MULTI4-27HP230C-O) is a 27,000 BTU multi-zone outdoor unit from MRCOOL Olympus. It runs on 208/230V, runs up to 4 indoor units, is rated 25 SEER2, has an HSPF2 of 9.5, uses R-454B refrigerant, and carries a 7-year compressor warranty.

- Line: [MRCOOL Olympus](https://minisplitfacts.com/lines/mrcool-olympus/)
- Category: [Multi-zone outdoor units](https://minisplitfacts.com/compare/multi-zone-outdoor/)
- Size tier within its line: 27k
- 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-olympus-27k-multi-zone-outdoor/

## Specifications

| Spec | Value | Source |
|---|---|---|
| Model number | MULTI4-27HP230C-O | [doxrepo.mrcool.com](https://doxrepo.mrcool.com/mc-cat-en-01.pdf) (brand, pdf, 2026-10-14) |
| Size | 27,000 BTU/h | [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) |
| Indoor units it runs | 4 | [doxrepo.mrcool.com](https://doxrepo.mrcool.com/mc-cat-en-01.pdf) (brand, pdf, 2026-10-14) |
| SEER2 (cooling efficiency) | 25 | [doxrepo.mrcool.com](https://doxrepo.mrcool.com/mc-cat-en-01.pdf) (brand, pdf, 2026-10-14) |
| EER2 (efficiency at 95 °F) | 13 | [doxrepo.mrcool.com](https://doxrepo.mrcool.com/mc-cat-en-01.pdf) (brand, pdf, 2026-10-14) |
| HSPF2 (heating efficiency) | 9.5 | [doxrepo.mrcool.com](https://doxrepo.mrcool.com/mc-cat-en-01.pdf) (brand, pdf, 2026-10-14) |
| Rated cooling capacity | not published |  |
| Heating capacity at 47 °F | not published |  |
| Heating capacity at 17 °F | not published |  |
| Heating capacity at 5 °F | not published |  |
| COP at 5 °F | 2 | [energystar.gov](https://www.energystar.gov/productfinder/product/certified-heat-pumps/details/4016551) (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/4016551) (certification, feed, 2026-10-14) |
| ENERGY STAR certified | yes | [energystar.gov](https://www.energystar.gov/productfinder/product/certified-heat-pumps/details/4016551) (certification, feed, 2026-10-14) |
| ENERGY STAR cold climate | yes | [energystar.gov](https://www.energystar.gov/productfinder/product/certified-heat-pumps/details/4016551) (certification, feed, 2026-10-14) |
| Line connection | Flare | [doxrepo.mrcool.com](https://doxrepo.mrcool.com/mc-cat-en-01.pdf) (brand, pdf, 2026-10-14) |
| Wi-Fi control | not published |  |
| Outdoor sound level | not published |  |
| Compressor warranty | 7 years | [doxrepo.mrcool.com](https://doxrepo.mrcool.com/mc-oly-4g-sz-mz-wr-en-01.pdf) (brand, pdf, 2026-10-14) |
| Parts warranty | 5 years | [doxrepo.mrcool.com](https://doxrepo.mrcool.com/mc-oly-4g-sz-mz-wr-en-01.pdf) (brand, pdf, 2026-10-14) |
| Warranty if you install it yourself | Kept | [doxrepo.mrcool.com](https://doxrepo.mrcool.com/mc-oly-4g-sz-mz-wr-en-01.pdf) (brand, pdf, 2026-10-14) |



## The equivalent in other lines

Same category, same size tier (27k), different line:

- [MRCOOL DIY 5th Gen 27,000 BTU multi-zone outdoor unit](https://minisplitfacts.com/products/mrcool-diy-5th-gen-27k-multi-zone-outdoor/) — $2,037
- [Pioneer Quantum Ultra 27,000 BTU 3-zone multi-zone outdoor unit (YNL-24)](https://minisplitfacts.com/products/pioneer-quantum-ultra-27k-3-zone-outdoor-ynl-24/) — $1,678


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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.