MRCOOL Olympus 18,000 BTU, 1.5 Ton Ductless Mini-Split Wall Mounted Air Handler - 230V/60Hz (O-18-HP-WMAH-230C-O)

MRCOOLSKU: O-18-HP-WMAH-230C-O
47 reviews

Price:
Sale price$526.00 Regular price$699.95SAVE 24%
In Stock
Estimated delivery: Aug 31st-Sep 9th
Free Curbside Delivery — carrier calls to schedule

Free Curbside Delivery

Included on every order
Ships free by freight carrier. Your order leaves the warehouse tracked, on a palletized freight truck.
The carrier calls ahead. You'll schedule a delivery window that works for you before the truck heads out.
Delivered to the curb. The item is placed at the end of your driveway. Moving it inside is your responsibility, so plan to have help on hand for heavy pieces.
Before you sign: inspect the packaging for damage. Signing the delivery receipt confirms it arrived in good condition.
In-Home Protection Plan
Home Outlet Direct + CPS

Add an Extended Protection Plan by CPS and Enjoy Peace of Mind!

Protection Plan Benefits:
  • Covers 100% parts and labor for product defects in materials and workmanship
  • Replacement of product if it cannot be repaired
  • No deductibles
  • Protection from dust, heat and internal humidity damage
  • Damage caused by power surges
  • In-home service
Full Coverage Details
No deductibles
International coverage
Easy claims process

Description

Enjoy peace of mind and reliable comfort with the MRCOOL® OLYMPUS ESTAR® 18k Series air handler, designed to efficiently heat and cool areas up to 800 square feet—making it an ideal choice for large rooms, offices, garages, and more. Thanks to its compact design, installation is fast and straightforward. Control your comfort from anywhere with the MRCOOL® Smart HVAC app, which allows Wi-Fi connectivity for remote access via your smartphone or tablet.

For added convenience, the unit also includes a wireless remote control, giving you flexible options to manage your indoor climate with ease. Engineered for energy efficiency, this system features a SEER2 rating of 23.5, EER2 of 12.7, and HSPF2-4 of 10.8, helping you lower your utility costs while staying comfortable year-round. With multiple fan speed settings and whisper-quiet operation at just 49 dB, it delivers powerful performance with minimal noise. Now using R-454B refrigerant, a more eco-friendly choice, this unit supports environmentally conscious living without sacrificing performance.

Enjoy seamless control options, including the smartHVAC app, wireless remote, and voice control compatibility with Amazon Alexa and Google Assistant, giving you personalized comfort at your fingertips.

Backed by an industry-leading warranty—including a limited lifetime warranty, 7-year compressor warranty, and 5-year parts warranty—the MRCOOL® OLYMPUS ESTAR® 18k Series air handler offers dependable performance, smart technology, and lasting comfort throughout the seasons.

Works With

  • O-ES-18-HP-C-230C-O1
  • MULTI4-27HP230C-O
  • MULTI5-36HP230C-O
  • MULTI6-48HP230C-O
DIMENSIONS & WEIGHT
Net Dimensions (In)
9.69 D x 12.64 H x 40.31 W
Net Weight (Lbs)
27.34
Gross Depth (In)
12.8
Gross Height (In)
15.75
Gross Width (In)
43.11
Gross Weight (Lbs)
36.6
GENERAL INFORMATION
Mount Type
Wall
Color
White
Max Coverage Area
Up to 800
Number Of Speeds
5 (Variable)
Oscillation
Yes
CAPACITY & PERFORMANCE
Tonnage
1.5
Cycle
60
COMPRESSOR & MOTORS
Blower Motor Speeds
635.7/500.3/359/294.3/294.3
Blower Motor Rpm
1190/994/896
NOISE LEVELS
Decibel Rating (Dba)
49.5/45/38/31.5/19.5
Decibel Rating Low (Dba)
19.5
Decibel Rating High (Dba)
49.5
ELECTRICAL REQUIREMENTS
Voltage (V)
208/230
Phase
1
Max Fuse Breaker (A)
15
Min Circuit Ampacity (A)
3
REFRIGERANT & PIPING
Refrigerant Type
R-454B
Lineset Fitting Type
Flare
Liquid Line Size
1/4
Suction Line Size
1/2
FILTER & HEATING
Filter Type
Reusable
Auxiliary Heater Included
No
Auxiliary Heater Available
No
CONTROLS & CONNECTIVITY
Fan Only Option
Yes
Sleep Mode
Yes
Auto Cool
Yes
Wifi Compatibility
Yes
App Compatibility
Yes
Works With Ios
Yes
Works With Android
Yes
Remote Control Included
Yes
SAFETY
UL Listed
Yes
CSA Listed
Yes
ETL Listed
Yes
Has Batteries
Yes
Contains Electronics
Yes
Contains Chemicals
Yes
Contains Compressed Gas
Yes
Proposition 65 Warning
Yes
Restricted States
GU, PR, VI
WARRANTY
Base Warranty
5-Year Parts
Base Parts Warranty
5-Year
Base Remote Warranty
5 Year
Registered Labor Warranty
None
Base Labor Warranty
None

MRCOOL Mini Split BTU Guide

Drawn to scale — 1 square = 2 × 2 ft
36K BTU
24K BTU
18K BTU
12K BTU
9K BTU
6K BTU
6K BTU up to 250 sq ft · Small bedroom, office
9K BTU up to 375 sq ft · Bedroom, home office
12K BTU up to 500 sq ft · Large bedroom, den
18K BTU up to 750 sq ft · Living room, master suite
24K BTU up to 1000 sq ft · Open living area
36K BTU up to 1500 sq ft · Great room, small home
Between sizes? Round up. A slightly larger unit runs efficiently at partial load — an undersized one runs constantly.
Shipping
  • Free Shipping on all orders.
  • Large Appliances: Ship via Curbside Delivery — the carrier delivers to your property but not inside your home.
  • Small Items: Ship via standard ground delivery (FedEx or similar), such as small appliances, range hoods, sinks, faucets, and accessories.
Full shipping policy
Returns
  • 30-Day Return Policy: Return requests must be submitted within 30 days of your delivery date. We cannot process returns after this period.
  • Return Requirements: Products must be unused, uninstalled, and in their original packaging (including box and pallet) to qualify.
  • Restocking Fee: A restocking fee may apply and varies by brand.
Full returns policy
Authorized MRCOOL Dealer
Full manufacturer warranty on every MRCOOL product we sell.

Customer Reviews

Based on 47 reviews
87%
(41)
11%
(5)
2%
(1)
0%
(0)
0%
(0)
J
Jim M. (Los Angeles, CA)
Easy to install and working great.

I needed to replace another unit that a previous contractor didn't do any part of that installation correctly, and the condensation line was leaking inside the house, running down the wall since that installation!! The indoor coil was 1-1/2" out of level, the line set wasn't wrapped, the electrical was tapped into the same circuit as the garage light and outlets...it was a mess.

It took me more time to demo the old unit out than to install the one I bought from you.

Thank you.

B
Bill (Philadelphia, PA)
Very pleased.

Very pleased with the price, delivery, ease of installation, and above all during this heatwave it is working excellently.

N
Natalie N. (San Jose, CA)
Perfect for our needs!

I ordered a 2 zone unit for the bedrooms in our home. It took a few months to arrive (manufacturer issue, nothing to do with HOD, and we were contacted on more than one occasion with an order update which was much appreciated!), but when it did arrive was very easy to install. Both the heat and AC function work perfectly, and our family is very happy!

R
Robert W. (Marietta, GA)
Decent Company

I ordered a HVAC system and it arrived in a timely manner and with no apparent issues. I thought the system was defective once installed but it was the installers fault who wired it wrong. My only issue would be the fee (30% I believe) to return a defective item within the 30 day return policy. If it is defective the customer shouldn't have to pay a fee to return an item that is not operating as designed. Other than that this is a good company.

P
Peter K. (Phoenix, AZ)
Pretty Easy Install and Works Great!

Installed my own central HP system. It was a bit of work but nothing beyond a person with basic mechanical and electrical skills. It took me a while because I had to remove the existing electric forced air furnace from a pretty tight place. Some custom sheet metal work and a bit of custom electrical too. Worked perfectly when powered up and I actually like the thermostat provided, although I wish it was clearer how to set up a temperature set-back schedule. Pre-charged refrigerant piping was something new and I liked that too. The best thing is that my electric utility forked out $4,000 and that paid for the unit!

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