Description
MRCOOL Olympus 12K BTU 1 Ton Wall-Mount Air Handler ONLY — O-12-HP-WMAH-230C-O
Professional-Grade Ductless Mini Split Indoor Unit for Precision Zone Control
The MRCOOL Olympus 12K BTU 1 Ton Wall-Mount Air Handler (O-12-HP-WMAH-230C-O) is a premium ductless indoor unit engineered for professional HVAC installations. As part of the Olympus series — MRCOOL's highest-tier ductless line — this air handler delivers superior comfort, whisper-quiet operation at just 38 dB, and smart connectivity via the MRCOOL Smart HVAC app. Designed for spaces up to 550 square feet, it pairs with compatible Olympus single-zone or multi-zone condensers to create a complete, high-efficiency mini split system.
Factory pre-charged with R-454B refrigerant — a next-generation, low-GWP alternative to R-410A — this unit meets current environmental standards while delivering outstanding performance. With a 27.4 SEER2 efficiency rating, the Olympus series dramatically reduces energy costs compared to conventional HVAC systems. Smart home integration with Amazon Alexa and Google Assistant provides hands-free control from anywhere.
Technical Specifications
| Specification | Value |
|---|---|
| Model / SKU | O-12-HP-WMAH-230C-O |
| Series | Olympus 4th Gen Air Handler |
| Type | Air Handler ONLY — Wall-Mount Ductless |
| Capacity | 12,000 BTU |
| Tonnage | 1 Ton |
| Coverage Area | 351–550 sq ft |
| SEER2 Rating | 27.4 |
| EER2 Rating | 15.4 |
| HSPF2 Rating | 12.5 |
| Refrigerant | R-454B |
| Voltage | 208-230V / 60Hz |
| Max Breaker | 15A |
| Min Circuit Ampacity | 3A |
| Sound Level | 38 dB |
| Dimensions | 36.61" W x 9.09" D x 11.81" H |
| Net Weight | 26.0 lbs (11.8 kg) |
| Liquid Line | 1/4" |
| Suction Line | 3/8" |
| WiFi / App | Yes — MRCOOL Smart HVAC App |
| Smart Home | Amazon Alexa, Google Assistant |
| Remote Control | Included |
| Certifications | UL Listed, ETL Listed, AHRI Certified |
| Warranty | 5-Year Parts |
Product Tips
- Air Handler ONLY: This listing is for the indoor air handler unit only. A compatible Olympus condenser (sold separately) is required to complete the system.
- Professional Installation Required: The Olympus series requires licensed HVAC installation. Proper vacuum, nitrogen testing, and refrigerant charging must be performed by a certified technician.
- Multi-Zone Compatible: This air handler is compatible with Olympus multi-zone condensers for up to 6-zone installations.
- R-454B Refrigerant: Uses next-generation R-454B refrigerant. Ensure your technician is certified for R-454B handling.
- Smart Control: Download the MRCOOL Smart HVAC app for remote control, scheduling, and energy monitoring from your smartphone.
Frequently Asked Questions
Compatible Accessories
- MRCOOL Olympus Single-Zone Condenser (O-XX-HP-C series)
- MRCOOL Olympus Multi-Zone Condenser (MULTI series)
- MRCOOL Non-DIY Line Set (MC25-1412 for 9K/12K/18K)
- MRCOOL Smart Wi-Fi Mini Stat (MSTAT01)
- MRCOOL Condenser Wall Mounting Kit
Need help? Contact us at /contact-us/
Warranty Information
The MRCOOL Olympus 4th Gen Air Handler includes a 5-Year Parts Warranty when registered within 30 days of installation by a licensed HVAC contractor.
Extra Information
Warranty Information
Parts: 5-year (unregistered)
Register your product within 30 days of installation to activate full warranty coverage. Visit mrcool.com/warranty-registration.
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