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).
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We will prepare your order within 24 hours if it’s received on a weekday (before noon). Orders are shipped in one to two business days. Transit time is between 3 to 6 business days, although exceptions apply. We email tracking information once your purchase is shipped.
Delivery Map
IMPORTANT DELIVERY INFORMATION: Please be kindly informed that this air conditioner, due to its weight and shipping restrictions, is shipped palletized with an arranged freight service and requires an appointment for delivery. To AVOID delays, please check if the provided phone number in the order details is a current number where you can be reached. You can also contact the carrier directly and refer to your tracking number to set up a date and time for your appointment. It is your responsibility to ensure a safe and secure environment for delivery. Please note that we cannot be held liable for any packages that are stolen or lost after delivery has been confirmed. PLEASE verify your shipping address, as changes to the address after freight has shipped can result in an additional 15% or higher fee depending on freight weight and dimensions.
SMALLWARES INFORMATION: Please be informed that for smaller items, such as Installation Kits, Smart Connectivity Dongles, and TTW Sleeves, when these items are ordered individually, they may be shipped via FedEx without a signature requirement. It is your responsibility to ensure a safe and secure environment for delivery. Please note that we cannot be held liable for any packages that are stolen or lost after delivery has been confirmed. Thank you for your understanding and cooperation.
INSPECT YOUR MERCHANDISE BEFORE SIGNING: Please inspect your boxes thoroughly when you receive them. They should arrive shrink-wrapped and on a pallet. If you notice any damages or imperfections (e.g. crushed box or forklift hole), please write comments on the receipt before signing for delivery, no matter how small damages seem. Contact us immediately to assist you.
Shipping & Delivery
We will prepare your order within 24–48 hours if it’s received on a weekday (before noon). Orders are shipped in one to two business days. Transit time is between 3 to 6 business days, although exceptions apply. We email tracking information once your purchase is shipped.
Delivery Map
IMPORTANT DELIVERY INFORMATION
Please be informed that this air conditioner, due to its weight and shipping restrictions, is shipped palletized with an arranged freight service and requires an appointment for delivery.
To AVOID delays, please make sure the phone number in your order details is accurate and one where you can be reached. You may also contact the carrier directly using your tracking number to schedule your delivery.
It is your responsibility to ensure a safe and secure delivery environment. We are not liable for any packages that are stolen or lost after delivery is confirmed.
Please verify your shipping address carefully. Changes to your shipping address after the freight has been shipped may result in additional fees of 15% or more, depending on freight weight and dimensions.
SMALLWARES INFORMATION
Smaller items such as Installation Kits, Smart Connectivity Dongles, and TTW Sleeves may be shipped via FedEx without a signature requirement if ordered individually.
It is your responsibility to ensure a safe delivery location. We are not liable for packages lost or stolen after delivery confirmation. Thank you for your understanding and cooperation.
INSPECT YOUR MERCHANDISE BEFORE SIGNING
Please inspect your boxes carefully upon delivery. Shipments should arrive shrink-wrapped and on a pallet. If you notice any damage or signs of mishandling (such as a crushed box or forklift puncture), write comments on the delivery receipt before signing, even if the damage appears minor.
Contact us immediately if any issues arise so we can assist you promptly.
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