Olympus 18,000 BTU 1.5 Ton Ductless Mini-Split Wall Mounted Air Handler - 230V/60Hz
Component — Not a Complete System
This is the indoor unit only. To run, you also need a matching outdoor condenser and a refrigerant line set. Looking for the complete system instead? Browse complete 18,000 BTU systems.
SKU O-MULTI18HP-WMAH-230
Customize it — compatible add-ons only
Any Olympus multi-zone condenser runs this head — size the total system to your rooms.
Copper pair in 1/4″ × 1/2″ — the diameter this unit's spec sheet calls for. Installed and charged by your HVAC tech.
Clean channel for the lines running down your exterior wall.
Universally compatible tools and care items — maintenance kit, coil cleaner, install tools.
Sizing Help
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Resources
Brochures & Manuals
Description
Olympus 18,000 BTU 1.5 Ton Ductless Mini-Split Wall Mounted Air Handler - 230V/60Hz
What's in the Box
Here's what you'll receive with your order
Wall-Mount Air Handler
Indoor ductless mini-split unit
Wireless Remote Control
Handheld remote with temperature control
Mounting Plate & Hardware
Wall mounting bracket and screws
Owner Manual
Installation and operation guide
Key Specifications
18000BTU
Cooling Capacity
1500sq ft
Coverage Area
208-230V
Voltage
30.5-46.6dBA
Noise Level
1
Zone Capacity
Olympus 18,000 BTU 1.5 Ton Ductless Mini-Split Wall Mounted Air Handler - 230V/60Hz — Model Details
What this specific model is sized for, how it installs, how it performs, and what it costs to run.
Room & Space Coverage — 18,000 BTU
The Olympus 18,000 BTU 1.5 Ton Ductless Mini-Split Wall Mounted Air Handler - 230V/60Hz delivers 18,000 BTU of cooling and heating capacity (1.5-ton class), sized for spaces up to 1,500 sq ft in standard 8-ft ceiling rooms with average insulation. At this capacity the unit handles medium primary rooms, master suites with attached bath, converted garages, and workshops. If your space includes a sunny west-facing wall or a finished bonus room above it, lean toward the upper end of the coverage range.
Efficiency & Operating Cost
This unit is rated at 22.5 SEER. SEER2 measures seasonal cooling efficiency — higher is better — and 22.5 puts this in the premium efficiency tier. For heating performance it carries a 10.2 HSPF rating, which translates to roughly 300–350% heating efficiency versus resistance electric — one kilowatt-hour of electricity moves three kWh of heat into the space at mild outdoor temperatures. Running the unit 8 hours a day at full load draws roughly 192 kWh/month — about $31/month at the US average $0.16/kWh residential rate. Real-world draw is usually 30–50% lower because inverter compressors modulate down most of the time. ENERGY STAR certification makes this SKU eligible for federal tax credits (25C in 2026, up to 30% / $2,000 for qualifying heat pumps) and most state/utility rebate programs — check your state page for specific amounts.
Power & Electrical Requirements
Power requirement: 208-230V 1-phase 60Hz (standard US residential 240V service). Minimum circuit ampacity is 18A with a maximum overcurrent protection of 25A. Wire the outdoor unit with 10 AWG copper on a dedicated 25A double-pole breaker (or single-pole at 120V), with a disconnect within sight of the condenser per NEC 440.14.
Install Difficulty — Professional Install
This is a professionally-installed condenser that requires a licensed HVAC technician with EPA 608 certification. The tech will pull a vacuum on the line set to 500 microns, pressure-test with nitrogen, release the factory charge, and commission per MrCool's startup procedure. Budget 1 full day for install on a single-zone system. Ships with R-410A refrigerant. R-410A is a mature, widely-serviced refrigerant; service technicians and parts are available at any HVAC supply house.
Sound Level & Comfort Features
Operating sound level ranges from 30.5 dB(A) on low to 46.6 dB(A) on high — the low end is whisper-quiet, below a normal conversation (60 dB) and comparable to a library reading room. The indoor blower offers 4 fan speeds plus auto mode, letting you trade airflow for quiet operation in bedrooms while running louder in living areas. Quiet mode caps fan speed and compressor rpm for an extra 2–3 dB drop in sound output.
Warranty & Certifications
When you register your unit within 60 days of purchase you get 5-year on parts and 7-year on the compressor through MrCool's registered warranty program. Unregistered coverage drops to None / None — registration takes 3 minutes at mrcool.com and is the highest-ROI post-purchase step you can take. AHRI certified and UL/ETL listed for North American electrical safety — required for most utility rebate and tax credit programs.
What's in the Box & Compatibility
Ships as a Mini Split with remote control included.
Product Details
This system is meant to be installed by a HVAC technician. The MRCOOL Olympus is THE whole house mini-split solution. Up to 5 zones, the Olympus offers aesthetically pleasing wall mounted, and ceiling cassette units. If you don't like saving money this system is not for you, otherwise please enjoy keeping more money in your pocket every month with efficiency ratings up to 23 SEER and 10.3 HSPF. This 1.5 ton 18,000 BTU wall mounted air handler can be matched with any Olympus condenser to condition rooms that are approximately 750 sq ft.
Specifications
| Cooling Capacity | 18,000 BTU |
| Heating Capacity | 18,000 BTU |
| Voltage | 208-230 V |
| Refrigerant | R-410A |
| Noise Level | 30.5-46.6 dBA |
| Coverage Area | 1500 sq ft |
| Zone Capacity | 1 zones |
| SEER Rating | Up to 22.5 |
| HSPF | 10.2 |
| Tonnage | 1.5 Ton |
| Airflow | 595/460/355 CFM |
| Phase | 1 |
| Refrigerant Type | R-410A |
| Liquid Line Size | 1/4 |
| Suction Line Size | 1/2 |
| Country of Origin | China |
Features
- Installation by a licensed professional required where applicable
- 7-Year Compressor, 5-Year Parts and 1-Year Remote warranty when registered and when installed by a licensed professional
- One House, One Solution. Multi-zone technology gives you flexibility and control whenever and wherever you want it.
- R-410A environmentally friendly refrigerant
- Sleep mode, louver position memory, Gold Fin® anti-corrosion and auto restart functions
- High efficient 22.5 SEER 10.20 HSPF performance
- Energy Star certified: estimated national average annual operating cooling cost is 203 dollars based on AHRI certificate #8977709
Frequently Asked Questions
Everything you need to know about this product
What size room will the Olympus 18,000 BTU 1.5 Ton Ductless Mini-Split Wall Mounted Air Handler - 230V/60Hz cool?
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What warranty do I get?
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What if it arrives damaged or I change my mind?
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