MRCOOL — Olympus 4th Gen (Ceiling Cassette Single-Zone)
MRCOOL® Olympus 18,000 BTU (1.5 Ton) Ceiling Cassette Mini Split Heat Pump — O-ES-18-HP-C-230C-O1 + CASSETTE18HP-230C-P-O
Overview
18,000 BTU Cooling 18,000 BTU Heating Up to 21.4 SEER2 Up to 12.5 EER2 HSPF2-4 11 1.5 Ton R-454B Ceiling Cassette 5 Speeds (Variable) DC Inverter ENERGY STAR® AHRI Certified Remote Included Pro Install Required
The MRCOOL® Olympus 18K Ceiling Cassette is a ceiling-flush comfort solution for mid-sized spaces. It pairs a ceiling cassette (with panel) with an inverter-driven outdoor unit for efficient, reliable heating and cooling using R-454B refrigerant.
Highlights
- Flush ceiling look: Cassette design blends into the ceiling for a sleek, modern finish.
- Coverage: Designed for areas up to 800 sq ft.
- Quiet comfort: Indoor sound levels down to 23.5 dB(A) with a high rating of 48 dB(A).
- Downflow delivery: Downflow airflow with oscillation for better room mixing.
- Installer-friendly hookups: Flare fittings with 1/4" liquid and 1/2" suction.
- Efficient performance: High efficiency ratings with inverter-driven outdoor performance.
Coverage
Up to 800 sq ft*
Up to 800 sq ft*
Cooling / Heating
18,000 / 18,000 BTU
18,000 / 18,000 BTU
Efficiency
Up to 21.4 SEER2
Up to 21.4 SEER2
Sound
Indoor 23.5–48 dB(A)
Indoor 23.5–48 dB(A)
*Coverage varies by climate, insulation, layout, and load.
What’s Included
- Outdoor Condenser: O-ES-18-HP-C-230C-O1
- Ceiling Cassette (with Panel): CASSETTE18HP-230C-P-O
- Remote Control
- Installation / user documentation (see Documents & Downloads)
Indoor Specs
Model: CASSETTE18HP-230C-P-O (Ceiling Cassette with Panel)
| System Type | Single-Zone Ductless Mini Split (Ceiling Cassette) |
| Tonnage | 1.5 Ton |
| Max Coverage Area | Up to 800 sq ft |
| Airflow Direction | Downflow |
| Indoor Noise (dB[A]) | 48 / 44.5 / 41 / 27.5 / 23.5 |
| Number of Speeds | 5 (Variable) |
| Oscillation | Yes |
| WiFi / App | No / No |
| Remote Control Included | Yes |
| Electrical | 208/230V • 1-Phase • 60 Hz |
| Max Fuse / Breaker | 15A |
| Min Circuit Ampacity | 3A |
| Line Set Fitting Type | Flare |
| Liquid / Suction Line | 1/4" / 1/2" |
| Blower Motor Speeds | 447.3 / 338.5 / 317.8 / 194.2 / 147.2 |
| Blower Motor RPM | 800 / 750 / 700 |
| Filter Type | Reusable |
| Fan Only / Sleep / Auto Cool | Yes / Yes / Yes |
| Color / Mount Type | White / Ceiling |
| Dimensions (W×D×H) | 22.44" × 22.44" × 9.65" |
| Net Weight | 35.27 lb |
| UPC / GTIN | UPC 840255588003 • GTIN 00840255588003 |
| Restricted States | GU, PR, VI |
| Proposition 65 Warning | Yes |
| Works With | O-ES-18-HP-C-230C-O1 • MULTI4-27HP230C-O • MULTI5-36HP230C-O • MULTI6-48HP230C-O |
Outdoor Specs
Model: O-ES-18-HP-C-230C-O1 (Single-Zone Condenser)
| System Type | Single-Zone Ductless Mini Split Heat Pump |
| Tonnage | 1.5 Ton |
| Cooling / Heating Capacity | 18,000 BTU / 18,000 BTU |
| Max Coverage Area | Up to 800 sq ft |
| SEER2 / EER2 | Up to 21.4 / Up to 12.5 |
| HSPF2-4 / HSPF2-5 | 11 / 8.5 |
| Outdoor Noise | 59 dB(A) |
| Electrical | 208/230V • 1-Phase • 60 Hz |
| MCA / Max Breaker | 19A / 20A |
| Refrigerant | R-454B • 55.38 oz factory charge |
| Inverter | DC |
| Compressor Motor Type | Rotary |
| Metering Device | EXV + Throttle Valve |
| Condenser Fan Motor RPM | 780 / 700 / 550 |
| Line Set | Flared fittings • Liquid 1/4" • Suction 1/2" |
| Max Line Set Length | 98.4 ft |
| Dimensions (W×D×H) | 35.04" × 13.46" × 26.5" |
| Net Weight | 99.87 lb |
| Energy Star Certified | Yes |
| AHRI Certified | Yes |
| UPC / GTIN | UPC 840255587648 • GTIN 00840255587648 |
| Restricted States | GU, PR, VI |
| Proposition 65 Warning | Yes |
| Works With | O-18-HP-WMAH-230C-O • DUCT-18HP-230B-O • CASSETTE18HP-230C-O |
Documents & Downloads
Important
- Professional installation: Installation by a licensed HVAC professional required where applicable.
- Electrical circuit: Size the circuit from the outdoor unit: 19A MCA with a 20A max breaker.
- Refrigerant & line length: Factory charge supports standard runs; longer runs may require additional refrigerant.
- Proposition 65: Warning applies (see product documentation).
FAQs
Does this cassette include WiFi / app control?
No. This cassette model is listed as no WiFi and no app compatibility. Remote control is included.
What line set sizes does it use?
Flare connections: 1/4" liquid and 1/2" suction.
What electrical circuit is required?
208/230V, 1-phase, 60 Hz. The outdoor unit specifies 19A MCA and a 20A max breaker.
What warranty comes with it?
Base warranty includes 5-year parts and 7-year compressor coverage (see the warranty document for full terms).
