MRCOOL® Olympus E Star® 4th Gen 12,000 BTU (1 Ton) Ductless Mini Split Heat Pump — O-ES-12-HP-C-230C-O1 + O-12-HP-WMAH-230C-O
Overview
The MRCOOL® Olympus E Star® 4th Gen 12k is a single-zone ductless mini split heat pump engineered for professional HVAC installation. It combines strong efficiency with quiet, steady inverter performance and includes a SmartHVAC WiFi control module for app control, scheduling, and monitoring. Voice control support with Amazon Alexa and Google Assistant is also available. The outdoor unit features Gold Fin® corrosion protection and the system uses R-454B refrigerant.
Highlights
- High efficiency: Up to 25.4 SEER2 with inverter-driven comfort.
- Wide operating range: Outdoor operation listed down to -22°F (heating and cooling).
- Gold Fin® condenser: Built to resist long-term corrosion (great for coastal applications).
- Smart control included: WiFi module + SmartHVAC app, plus Alexa/Google Assistant support.
- Comfort features: Sleep mode, louver position memory, and auto-restart.
- Installer-focused design: Compact outdoor unit and durable, enclosed condenser fan motor.
351–500 sq ft*
12,000 / 12,000 BTU
Up to 25.4 SEER2
Indoor 22–36.5 dB(A)
*Other provided notes indicate this 12k size is used for “up to 550 sq ft.” Real coverage varies by climate, insulation, and load.
What’s Included
- Outdoor Condenser: O-ES-12-HP-C-230C-O1
- Wall-Mounted Air Handler: O-12-HP-WMAH-230C-O
- SmartHVAC WiFi Control Module
- Remote Control
- Installation / service documentation (see Documents & Downloads)
Indoor Specs
Model: O-12-HP-WMAH-230C-O (Wall-Mounted Air Handler)
| System Type | Single-Zone Ductless Mini Split |
| Zone Capacity | 1 |
| Cooling / Heating Capacity | 12,000 BTU / 12,000 BTU |
| Coverage Area | 351–500 sq ft (see note in Highlights) |
| Indoor Noise (Hi/Mi/Lo) | 36.5 / 32.5 / 22 dB(A) |
| WiFi / App | Yes / Yes (SmartHVAC) |
| Voice Control | Amazon Alexa / Google Assistant |
| Electrical | 208–230V • 1-Phase • 60 Hz |
| Dimensions (W×D×H) | 33.74" × 9.09" × 11.81" |
| Weight | 22.93 lb |
Outdoor Specs
Model: O-ES-12-HP-C-230C-O1 (Single-Zone Condenser)
| System Type | Single-Zone Ductless Mini Split Heat Pump |
| Cooling / Heating Capacity | 12,000 BTU / 12,000 BTU |
| Outdoor Temp Range (Cooling) | -22°F to 122°F |
| Outdoor Temp Range (Heating) | -22°F to 75°F |
| SEER2 / EER2 | Up to 25.4 / 13.4 |
| HSPF2-4 / HSPF2-5 | 10.5 / 8 |
| Outdoor Noise | 56 dB(A) |
| Electrical | 208–230V • 1-Phase • 60 Hz |
| MCA / Max Breaker | 15A / 15A |
| Refrigerant | R-454B • 35.27 oz factory charge |
| Line Set | Flared fittings • Liquid 1/4" • Suction 3/8" |
| Max Line Set Length | 82 ft |
| Dimensions (W×D×H) | 31.69" × 12.99" × 21.81" |
| Weight | 72.75 lb |
Documents & Downloads
Important
- HVAC technician required: This model is intended for installation by a licensed professional.
- Vacuum required: A licensed HVAC technician must pull a vacuum on the line set prior to commissioning.
- Refrigerant charge & line length: Factory charge supports line set; longer runs might require additional refrigerant.
- Coastal durability: Gold Fin® condenser helps resist corrosion.
FAQs
Does this system require professional installation?
Yes. Installation by a licensed HVAC technician is required for proper setup and performance.
Is WiFi control included?
Yes. A SmartHVAC WiFi control module is included, with app control plus Amazon Alexa and Google Assistant support.
How cold can it run?
Provided operating ranges list outdoor operation down to -22°F for both cooling and heating.
What electrical circuit is required?
208–230V, 1-phase, 60 Hz with a 15A max fuse/breaker and 15A minimum circuit ampacity.
What warranty comes with it?
5-year parts and 7-year compressor warranty (extendable to a limited lifetime warranty upon registration, as provided).
