• MRCOOL | MRCOOL Olympus 4th Gen Wall AH 12,000 BTU (1 Ton) – O-12-HP-WMAH-230C-O | CLICK HERE TO CONTACT US FOR CUSTOM QUOTES AND QUESTIONS CLICK TO CALL US 737-738-6329 FOR A
  • MRCOOL | MRCOOL Olympus 4th Gen Wall AH 12,000 BTU (1 Ton) – O-12-HP-WMAH-230C-O | CLICK HERE TO CONTACT US FOR CUSTOM QUOTES AND QUESTIONS CLICK TO CALL US 737-738-6329 FOR A
  • MRCOOL | MRCOOL Olympus 4th Gen Wall AH 12,000 BTU (1 Ton) – O-12-HP-WMAH-230C-O | CLICK HERE TO CONTACT US FOR CUSTOM QUOTES AND QUESTIONS CLICK TO CALL US 737-738-6329 FOR A
1 3

MRCOOL

MRCOOL Olympus 4th Gen Wall AH 12,000 BTU (1 Ton) – O-12-HP-WMAH-230C-O

SKU: O-12-HP-WMAH-230C-O

System highlights
AC Type
Wall Mount
Refrigerant Type
R454B
Brand
MRCOOL
Indoor Unit
12000 BTU (1.0 TON)
Voltage
208-230V
Looking For
Wall Mount
Cooling Area (sq.ft.)
400-550
Series
Olympus 4th Generation
Installation Kit
$401.00 USD
$284.57 USD $401.00 USD
Sale Sold out
Shipping calculated at checkout.
View full details
MRCOOL — Wall Mount

MRCOOL Olympus 4th Gen Wall AH 12,000 BTU (1 Ton) – O-12-HP-WMAH-230C-O

Contact for custom quotes Call 800-543-8933

CLICK HERE TO CONTACT US FOR CUSTOM QUOTES AND QUESTIONS

CLICK TO CALL US 800-543-8933 FOR ANY QUESTIONS

MRCOOL Olympus 4th Gen Wall AH 12,000 BTU (1 Ton) – O-12-HP-WMAH-230C-O

Overview

Tailored for rooms up to 550 sq. ft., the ESTAR® 12K wall unit blends compact styling, quick installation, and quiet comfort down to 19.5 dBA. Control it your way—Wi-Fi app, voice commands, or the included remote. Featuring up to SEER2 25.5 efficiency and R-454B refrigerant, it reduces energy use while maintaining steady, even temperatures in bedrooms, home offices, and similar spaces. Includes limited lifetime, 7-year compressor, and 5-year parts coverage.

Quick Facts

  • Capacity: 12,000 BTU (1 Ton)
  • Coverage: Up to 550 sq. ft.
  • Refrigerant: R-454B
  • Voltage/Phase/Frequency: 208/230V, 1-Phase, 60 Hz
  • Sound: 47 / 36.5 / 32.5 / 22 / 19.5 dBA
  • Fan Speeds: 5 (Variable) with Oscillation
  • Smart Control: Wi-Fi + App + Alexa/Google

Use our sizing calculator (BTU Calculator).

Works With (Outdoor Units)

O-ES-12-HP-C-230C-O1, MULTI3-18HP230C-O, MULTI4-27HP230C-O, MULTI5-36HP230C-O, MULTI6-48HP230C-O

Key Features

  • Compact wall-mount design
  • Quiet down to 19.5 dBA
  • R-454B refrigerant
  • Wi-Fi/app/voice + remote

Technical Specifications

Specification Details
Brand / Series MRCOOL / Olympus 4th Gen Air Handlers
Model O-12-HP-WMAH-230C-O
GTIN / UPC 00840255587716 / 840255587716
Unit Type Mini-Split
Tonnage 1
Voltage / Phase / Cycle 208/230V / 1-Phase / 60 Hz
Max Fuse Breaker 15 A
Min Circuit Ampacity 3 A
Mount Type Wall
Color White
Max Coverage Area Up to 550
Refrigerant Type R-454B
Sound (dBA) 47 / 36.5 / 32.5 / 22 / 19.5
Number of Speeds 5 (Variable)
Oscillation Yes
Lineset Fitting Type Flare
Liquid / Suction Line 1/4" / 3/8"
Blower Motor Speeds (CFM) 441.4 / 323.7 / 229.6 / 176.6 / 147.2
Blower Motor RPM 1100 / 850 / 700
Filter Type Reusable
Aux Heater (Incl/Avail) No / No
Fan Only / Sleep / Auto Cool Yes / Yes / Yes
Wi-Fi / App / iOS / Android Yes / Yes / Yes / Yes
Remote Included Yes
UL / CSA / ETL Listed Yes / Yes / Yes
Prop 65 Yes
Restricted States GU, PR, VI
Net Dimensions (HxWxD) 11.81" × 33.74" × 9.09"
Net / Gross Weight 22.93 lbs / 29.32 lbs
Gross Dimensions (HxWxD) 14.57" × 36.22" × 12.2"

Warranty Information

  • Limited Lifetime (see MRCOOL terms)
  • 7-Year Compressor Coverage
  • 5-Year Parts Warranty

Manuals & Downloads

Please note: Indoor air handler must be matched with a compatible MRCOOL outdoor unit.