MRCOOL® Olympus 18,000 BTU (1.5 Ton) Ductless Mini Split Wall-Mounted Air Handler 230V/60Hz | O-18-HP-WMAH-230C-O
Olympus = Best. The MRCOOL® Olympus 18,000 BTU (1.5 Ton) Ductless Wall-Mounted Air Handler delivers premium, whisper-quiet comfort and smart control for spaces up to 800 sq. ft. Featuring SEER2 23.5, EER2 12.7, and HSPF2-4 10.8, this ESTAR® 18k model combines high efficiency with modern convenience—Wi-Fi app control, voice compatibility, and low 49 dB operation.
Professional Install Required: Olympus indoor units are part of a traditional (non-DIY) mini split system. Lines must be nitrogen-evacuated and vacuumed before releasing charge from the outdoor condenser to ensure performance and warranty coverage.
Key Benefits
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Compact & Powerful: Ideal for bedrooms, offices, and garages up to 800 sq. ft.
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High Efficiency: SEER2 23.5, EER2 12.7, HSPF2-4 10.8 for year-round savings.
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Smart Control: Built-in Wi-Fi with the MRCOOL® Smart HVAC app for remote access.
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Voice Ready: Works with Amazon Alexa and Google Assistant.
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Quiet Comfort: Operates at just 49 dB to minimize distractions.
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Eco-Conscious: Uses next-gen R-454B refrigerant.
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Flexible Control: Includes a handy remote control for quick adjustments.
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Warranty: Backed by a 5-year parts warranty.
Who Is This For?
Homeowners who want best-tier wall-mounted comfort with premium efficiency, plus the convenience of Wi-Fi and voice control. Great for single rooms, additions, studios, and light commercial offices.
Technical Specifications
| Model |
Capacity |
Voltage/Frequency |
Coverage |
Efficiency (SEER2 / EER2 / HSPF2-4) |
Sound Level |
Refrigerant |
Controls |
Warranty |
| O-18-HP-WMAH-230C-O |
18,000 BTU (1.5 Ton) |
230V / 60Hz |
Up to ~800 sq. ft. |
23.5 / 12.7 / 10.8 |
49 dB (low) |
R-454B |
Wi-Fi App + Remote; Alexa & Google |
5-Year Parts |
Coverage varies by insulation, climate, ceiling height, windows, and layout.
Professional Installation Required
As a traditional (non-DIY) Olympus system, this indoor unit must be installed by a licensed HVAC technician. The line set must be nitrogen pressure-tested and vacuumed before releasing refrigerant from the outdoor condenser. Proper commissioning ensures efficiency, reliability, and warranty validity.
Reminder: Olympus = Best tier performance and pro installation.
What’s Included
- MRCOOL® Olympus 18k Wall-Mounted Air Handler
- Remote control
- Wi-Fi capability for MRCOOL® Smart HVAC app
- Owner’s manual & quick start guide
Popular Add-Ons
- Matching Olympus outdoor condenser (properly sized/paired)
- Line set & communication wire (installer supplied/spec’d)
- Wall sleeve, condensate accessories, surge protection
Nationwide Shipping from the USA’s Most Trusted MRCOOL® Dealer
Order from MRCOOLDIYDirect.com for fast nationwide shipping, genuine MRCOOL® products, and expert support.
SKU: O-18-HP-WMAH-230C-O
Series: Olympus (ESTAR® 18k) — Best Tier
Type: Ductless Mini Split Wall-Mounted Air Handler
Brand: MRCOOL®
Availability: Ships Nationwide from MRCOOLDIYDirect.com
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